What is the difference between a bumper-to-bumper warranty and a powertrain warranty?

A bumper-to-bumper warranty (also called a full-coverage or basic warranty) covers most components and systems in the vehicle except normal wear items like tires, brake pads, wiper blades, and light bulbs. It typically lasts 3 years or 36,000 miles, whichever comes first, though some manufacturers offer 4 or 5 years. A powertrain warranty covers only the components that generate and deliver power to the wheels: the engine, transmission, transfer case (on all-wheel-drive vehicles), and driveshaft. It typically lasts 5 years or 60,000 miles, with some manufacturers like Hyundai, Kia, and Genesis offering 10 years or 100,000 miles. The bumper-to-bumper warranty expires first, leaving a gap where your engine and transmission are still covered but electrical, suspension, and other systems are not. Both warranties only cover manufacturing defects and workmanship errors, not damage from accidents, neglect, or normal wear.

Are extended warranties worth buying?

It depends on the vehicle, your financial situation, and how long you plan to keep the car. An extended warranty (more accurately called a vehicle service contract) makes the most financial sense on vehicles with below-average reliability ratings that you plan to keep well past the factory warranty period, and on households that cannot absorb a surprise repair bill of $2,000 to $5,000. It makes less sense on vehicles with strong reliability records, on vehicles you plan to sell before the factory warranty expires, or if you maintain a well-funded vehicle repair reserve. If you do buy one, do not buy it at the dealership on the day of purchase. Dealer prices are typically two to three times higher than the same coverage from independent providers or directly from the manufacturer. Get quotes from at least three providers and compare coverage limits, component lists, deductibles, exclusions, transferability, and the claims process before committing. Read the contract carefully: some contracts are exclusionary (covering everything except a short list), while others are named-component (covering only what is listed), and the difference matters when a $3,000 repair hits.

Is my car collecting data about my driving and sharing it?

If your vehicle was manufactured after roughly 2018 and has a built-in cellular connection (which most new vehicles now do), it is almost certainly collecting data about your driving behavior, including location, speed, braking patterns, acceleration, and trip timing. Whether that data is being shared with third parties depends on the manufacturer and what you consented to when you activated connected services. In January 2025, the FTC reached a settlement with General Motors and OnStar after finding that they collected and shared driving behavior and location data with consumer reporting agencies like LexisNexis and Verisk without adequate consent. That data was then used by insurance companies to adjust premiums. In May 2026, the California Privacy Protection Agency fined GM $12.75 million for the same practices. To limit data collection, review your vehicle's connected services settings, opt out of telematics data sharing programs, and check whether your automaker has a privacy request portal where you can download or delete your data. Be cautious about opting into insurance telematics programs that promise discounts in exchange for driving data, and read the terms carefully before agreeing.

Recalls, Warranties, and Vehicle Privacy: What Every Owner Should Know

Q: How do I check if my vehicle has an open recall?

Go to NHTSA.gov/Recalls and enter either your vehicle's license plate number (select your state first) or the 17-character Vehicle Identification Number (VIN). Your VIN is printed on the lower-left corner of your windshield, on the label inside the driver's side door jamb, and on your vehicle registration and insurance documents. NHTSA's lookup tool will show any open safety recalls for your specific vehicle. You can also download the free NHTSA SaferCar app and enter your VIN to receive automatic alerts when new recalls are issued. NHTSA recommends checking at least twice per year. In 2025 alone, 997 recalls affected more than 29 million vehicles, yet an estimated 25 percent of recalled vehicles are never repaired. All recall repairs are performed free of charge at any authorized dealership for your vehicle's brand, regardless of the vehicle's age, mileage, or where you purchased it.

Q: What qualifies a vehicle as a lemon?

Under most state lemon laws, a vehicle qualifies as a lemon when it has a substantial defect covered by the manufacturer's warranty that significantly impairs its use, value, or safety, and the defect persists after the manufacturer or dealer has been given a reasonable number of repair attempts. What counts as a reasonable number varies by state but is generally three to four attempts for the same defect, or a cumulative total of 30 days out of service for repairs within the warranty period or within one to two years of purchase. Some states apply a lower threshold for safety-related defects. Most state lemon laws apply to new vehicles purchased or leased for personal use, though some states extend coverage to used vehicles, leased vehicles, or vehicles used for business. If your vehicle qualifies, the manufacturer must either replace it with a comparable vehicle or refund the purchase price minus a mileage deduction. The Magnuson-Moss Warranty Act also provides a federal cause of action. Contact your state attorney general's office or a consumer protection attorney for the specific rules in your state.

Three systems every owner should understand

Your vehicle came with fine print.

Three systems govern your relationship with your vehicle's manufacturer long after you sign the purchase paperwork: the recall system that fixes safety defects at no cost to you, the warranty that covers manufacturing problems for a defined period, and the increasingly complex data collection built into modern connected vehicles.

Most vehicle owners interact with these systems only when something goes wrong, which means they learn the rules under pressure. A recall notice arrives and you are not sure if it is real. A component fails at 40,000 miles and you do not know whether your powertrain warranty or your bumper-to-bumper warranty covers it. Your insurance premium rises and you discover your car was reporting your driving behavior to a data broker.

This guide explains how each system works, what your rights are, and what steps to take. It covers the NHTSA recall process from start to finish, every type of factory warranty, how to evaluate extended warranties and vehicle service contracts, your rights under state lemon laws and the Magnuson-Moss Warranty Act, and the rapidly evolving landscape of connected-car data privacy.

Safety first

The recall system and how it protects you.

A safety recall is issued when a manufacturer or the National Highway Traffic Safety Administration (NHTSA) determines that a vehicle, piece of equipment, car seat, or tire creates an unreasonable safety risk or fails to meet minimum safety standards. In 2025, NHTSA issued 997 recall campaigns affecting more than 29 million vehicles. Yet an estimated one in four recalled vehicles is never repaired.

How recalls work

Recalls begin when either a manufacturer discovers a safety-related defect or when NHTSA opens an investigation based on consumer complaints, crash data, or engineering analysis. Once a recall is decided, the manufacturer must notify NHTSA, develop a remedy, and contact all registered vehicle owners by first-class mail within 60 days. The repair, replacement, or refund must be provided at no cost to the vehicle owner. There is generally no expiration date for safety recalls on motor vehicles.

How to check for recalls on your vehicle

1

Find your VIN

Your 17-character Vehicle Identification Number is printed on the lower-left corner of your windshield, on the label inside your driver's side door jamb, and on your vehicle registration and insurance documents.

2

Search at NHTSA.gov/Recalls

Enter your VIN or your license plate number (select your state first). The tool shows all open safety recalls for your specific vehicle, including a description of the defect, the safety risk, and the available remedy.

3

Schedule the repair

Contact any authorized dealership for your vehicle's brand. You do not need to have purchased the vehicle from that dealer. The repair is free regardless of the vehicle's age or mileage. If the recall remedy is not yet available, the manufacturer may provide interim safety guidance, a loaner vehicle, or other temporary measures.

4

Set up automatic alerts

Download the free NHTSA SaferCar app and enter your VIN to receive push notifications when new recalls are issued for your vehicle. You can also sign up for email alerts at NHTSA.gov/Alerts. NHTSA recommends checking at least twice per year.

Critical recalls: do not drive and fire risk

Some recalls are more urgent than others. NHTSA flags "do not drive" recalls and fire-risk recalls with prominent warnings on their website. If your vehicle has one of these, stop driving it immediately and contact a dealer to arrange the repair or a loaner vehicle. The manufacturer is responsible for providing a remedy even if the vehicle cannot be safely driven to the dealership.

Filing a safety complaint

If you believe your vehicle has a safety defect that has not been recalled, you can file a complaint with NHTSA at NHTSA.gov/Report-a-Safety-Problem. Consumer complaints are a primary way NHTSA identifies potential defects and initiates investigations. Your complaint becomes part of the public record and may contribute to a future recall investigation.

What the manufacturer covers

Understanding your factory warranty.

Every new vehicle comes with a factory warranty included in the purchase price. The warranty covers manufacturing defects and workmanship errors for a defined period. It does not cover damage from accidents, neglect, modifications, or normal wear and tear. Understanding what is covered, for how long, and what can void it protects you from both unexpected repair bills and misleading claims from service advisors.

Types of factory warranty coverage

Bumper-to-bumper (full-coverage) warranty

Typical coverage: 3 years / 36,000 miles (whichever comes first)

Covers most components and systems in the vehicle, from electrical and suspension to climate control and infotainment. Excludes normal wear items: tires, brake pads, wiper blades, light bulbs, fuses, and clutch linings. Some manufacturers offer longer full-coverage terms. Always check your specific vehicle's warranty booklet for exact terms.

Powertrain warranty

Typical coverage: 5 years / 60,000 miles

Covers the components that generate and deliver power to the wheels: engine, transmission, transfer case (on AWD/4WD vehicles), and driveshaft. Most mainstream brands (Ford, Chevrolet, Honda, Toyota) offer 5 years or 60,000 miles. Hyundai, Kia, Genesis, and Mitsubishi offer 10 years or 100,000 miles. Luxury brands vary: BMW and Mercedes-Benz typically match their bumper-to-bumper at 4 years/50,000 miles, while Acura, Cadillac, and Lincoln extend to 6 years/70,000 miles.

Corrosion (perforation) warranty

Typical coverage: 5-12 years / unlimited mileage

Covers rust-through (perforation) on body panels. Does not cover surface rust or cosmetic corrosion. Important in salt-belt states where road treatments accelerate corrosion. Coverage length varies significantly by manufacturer.

Emissions warranty

Federal minimum: 8 years / 80,000 miles on major components

Required by federal law. Covers the catalytic converter, electronic emissions control unit, and onboard diagnostic device for 8 years or 80,000 miles. Other emissions components are covered for 2 years or 24,000 miles. California and states that follow California emissions standards (CARB states) may extend emissions coverage further.

EV/hybrid battery warranty

Federal minimum: 8 years / 100,000 miles

Federal law requires manufacturers to warrant EV and hybrid high-voltage battery packs for at least 8 years or 100,000 miles. California and CARB states require 10 years or 150,000 miles. Many manufacturers exceed these minimums. This warranty typically covers defects in the battery pack and related high-voltage components but may not cover gradual capacity loss unless it falls below a specified threshold (often 70 percent of original capacity).

Certified Pre-Owned (CPO) warranty

Typical coverage: Varies by manufacturer

CPO programs are offered by manufacturers through their franchised dealerships on qualifying used vehicles that pass a multi-point inspection and meet age and mileage requirements. CPO warranties typically combine elements of powertrain and bumper-to-bumper coverage and are backed by the manufacturer, not the dealer. This is a significant advantage over third-party used car warranties, which are backed only by the issuing company. CPO vehicles cost more than non-certified used vehicles, but the factory-backed warranty and inspection provide a level of assurance that independent used car warranties generally cannot match. Each manufacturer sets its own CPO standards, inspection procedures, and warranty terms.

The warranty gap and how to manage it

When your bumper-to-bumper warranty expires at 3 years or 36,000 miles, your powertrain warranty continues, but everything else is no longer covered. Electrical components, climate control, suspension, sensors, and infotainment systems that fail after the bumper-to-bumper expires are your responsibility. This gap is where most unexpected repair bills land, because these are exactly the types of components that tend to fail in the 4- to 8-year-old window.

You have three options for managing this gap. First, you can self-insure by maintaining a dedicated vehicle repair fund, adding $50 to $100 per month so that when a $1,500 repair lands, the money is already set aside. Second, you can purchase an extended warranty or wrap warranty that covers non-powertrain components during the gap period. Third, you can accept the risk and pay out of pocket when something fails. Which approach makes sense depends on your vehicle's reliability history, your financial cushion, and your risk tolerance.

What does not void your warranty

Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your warranty solely because you used an independent repair shop, aftermarket parts, or performed your own maintenance. If a dealer tells you that changing your own oil or having brake pads installed at an independent shop voids your warranty, that statement violates federal law. The FTC has issued guidance under 16 CFR Part 700 specifically clarifying this point, and in 2022 sent warning letters to multiple manufacturers whose warranty language appeared to violate it.

What can affect warranty coverage is a failure to perform required maintenance at the specified intervals, or a modification that directly causes the failure being claimed. If you install an aftermarket turbo kit and the engine fails, the manufacturer can deny the engine claim because the modification caused the failure. But they cannot deny a warranty claim on your window regulator because you installed aftermarket brake pads.

Beyond the factory

Evaluating extended warranties and service contracts.

An extended warranty, more accurately called a vehicle service contract (VSC), covers repair costs for specific components after the factory warranty expires. They are optional, they cost money, and whether they make financial sense depends entirely on your vehicle, your financial situation, and the specific contract terms.

Types of coverage

Exclusionary (full-coverage) plans

Cover everything except a specific list of excluded items. These provide the broadest coverage and are the closest to a bumper-to-bumper factory warranty. More expensive, but fewer surprises when you file a claim.

Named-component (listed) plans

Cover only the specific components listed in the contract. Everything not named is excluded. These are less expensive but leave more gaps. If a component fails and it is not on the list, you pay the full cost.

Powertrain-only plans

Cover only engine, transmission, and drivetrain components. The least expensive option but also the narrowest. These make sense primarily on vehicles where the powertrain is the most likely expensive failure, and where everything else is either inexpensive to repair or unlikely to fail.

Wrap warranties

Designed to fill the gap between your expired bumper-to-bumper warranty and your still-active powertrain warranty. They cover non-powertrain components like electronics, climate control, and suspension without duplicating the powertrain coverage you already have. A cost-effective option for newer vehicles with long remaining powertrain coverage.

When a service contract makes sense

Your vehicle has below-average reliability ratings for its make and model
You plan to keep the vehicle well past the factory warranty period
Your household cannot absorb a surprise repair bill of $2,000 to $5,000
Your vehicle has known weaknesses in expensive systems (transmissions, turbos, infotainment)

When it probably does not

Your vehicle has strong reliability ratings (Toyota Camry, Honda Civic, Mazda CX-5)
You plan to sell or trade before the factory warranty expires
You have a dedicated vehicle repair fund that can cover major unexpected repairs
The contract cost exceeds the statistical likelihood of needing covered repairs

Do not buy at the dealership

The finance and insurance office at a dealership is the single most expensive place to buy a vehicle service contract. Dealer prices are typically two to three times higher than the same or better coverage from independent providers, manufacturer direct programs, or programs through organizations like AAA or Costco Auto. If you decide you want coverage, decline it at the dealership, go home, research your options, get quotes from at least three providers, and compare coverage, deductibles, exclusions, claims processes, and transferability. You can purchase coverage any time before the factory warranty expires.

What to look for in any contract

Read the actual contract, not just the marketing summary. Check the component list (or exclusion list) line by line. Confirm whether the deductible applies per visit or per repair. Verify whether you can use any licensed repair facility or only specific ones. Check whether the contract is transferable if you sell the vehicle (transferable contracts add resale value). Confirm the claims process: does the provider pay the shop directly, or do you pay out of pocket and file for reimbursement? And look for the cancellation policy: most reputable contracts offer a prorated refund if you cancel.

When the vehicle is the problem

Lemon laws and your options.

Every state has enacted some form of lemon law to protect consumers who purchase a vehicle with a substantial defect that the manufacturer cannot fix after a reasonable number of attempts. An estimated 1 percent of new vehicles, roughly 150,000 per year, are lemons. If yours is one of them, the law provides a path to a replacement or refund.

What qualifies as a lemon

While specifics vary by state, most lemon laws require three conditions:

1

A substantial defect

The problem must significantly impair the vehicle's use, value, or safety. Minor issues like a rattle, radio static, or a squeaky seat do not qualify. A transmission that slips out of gear, an electrical system that intermittently shuts down, or brakes that pull hard to one side do.

2

Covered by warranty

The defect must be one that falls within the manufacturer's warranty coverage and must have arisen within the warranty period or within a specified time/mileage window after purchase (typically 12 to 24 months or 12,000 to 24,000 miles).

3

Not fixed after reasonable repair attempts

You must give the manufacturer or dealer a reasonable opportunity to repair the defect. What counts as reasonable varies by state but is generally three to four repair attempts for the same problem, or a cumulative total of 30 days out of service for repairs. Some states apply a lower threshold for safety-related defects.

What you can get

If your vehicle qualifies as a lemon, the manufacturer must either replace it with a comparable vehicle (same make, model, and features) or refund the full purchase price minus a mileage deduction for the period you used the vehicle before the defect first appeared. Some states also allow you to recover incidental costs such as rental cars, towing, and in some cases attorney's fees.

Protect yourself: document everything

If you suspect your vehicle may be a lemon, documentation is your strongest protection. Keep every repair order. Note the date you reported each problem and the date the vehicle was returned. Record the mileage at each visit. Keep written communication with the dealer and manufacturer. If the dealer describes the problem differently on different repair orders, note the inconsistency. Your documentation is the evidence that establishes whether you meet your state's threshold for a lemon law claim.

The federal backup: Magnuson-Moss Warranty Act

In addition to your state's lemon law, the federal Magnuson-Moss Warranty Act provides a cause of action when a manufacturer or seller fails to honor the terms of a written warranty on any consumer product, including vehicles. This federal law can be particularly useful when a state lemon law does not cover your situation (for example, if you are slightly outside the state's time or mileage window). Contact your state attorney general's consumer protection division or a consumer protection attorney for guidance specific to your situation.

Your car is watching

Connected-car data and your privacy.

If your vehicle was manufactured after approximately 2018 and has a built-in cellular connection, it is collecting data about how you drive. Location, speed, braking patterns, acceleration, trip timing, and in some cases even voice commands to the in-car assistant. Most new vehicles sold today ship with microphones, cameras, GPS modules, and a permanent internet connection.

Some of this data serves legitimate purposes: diagnostics, over-the-air software updates, crash notification, and stolen vehicle recovery. But manufacturer privacy policies are written broadly, and broad language creates room for secondary uses that most vehicle owners never consented to knowingly.

What your vehicle collects

Modern connected vehicles can collect more than 100 different data points. The specific data varies by manufacturer and model, but commonly includes precise GPS location (sometimes recorded as frequently as every three seconds), vehicle speed and acceleration patterns, braking force and frequency, steering wheel angle and cornering behavior, trip start and end times, trip distance and duration, engine and transmission operating data, tire pressure readings, seatbelt status, fuel level and consumption patterns, and in vehicles with interior cameras or microphones, voice commands and in some cases cabin images.

Much of this data flows through the manufacturer's telematics system, which maintains a persistent cellular connection even when you are not using any connected services. The vehicle does not need you to pair a phone or activate an app. If it has a built-in cellular modem, it is transmitting data. The privacy policy you agreed to when you activated your vehicle's connected services, or in some cases when you purchased the vehicle, governs what happens with that data.

What happened with General Motors and OnStar

In January 2025, the Federal Trade Commission reached a settlement with General Motors and its OnStar subsidiary after finding that they collected and shared precise geolocation and driving behavior data with consumer reporting agencies, including LexisNexis and Verisk, without adequate consumer consent. That data was then packaged and sold to insurance companies, which used it to adjust premiums. Drivers saw their insurance rates rise based on telematics reports they never knew existed. The FTC's settlement required GM to stop selling driver data to consumer reporting agencies, obtain separate affirmative consent before sharing telematics with any third party, and delete data already collected from drivers who had not given express consent.

In May 2026, the California Privacy Protection Agency assessed GM a $12.75 million penalty for the same practices, the largest penalty ever issued under the California Consumer Privacy Act. Honda, Hyundai, Ford, and other manufacturers have faced similar scrutiny and litigation over connected-car data sharing.

Insurance telematics: the discount trade-off

Insurance telematics programs cover more than 21 million U.S. policyholders as of 2024 and have grown at roughly 28 percent annually since 2018. The premise is simple: share your driving data, earn a discount. But the terms of that trade deserve careful reading before you opt in.

Telematics data can be collected through a phone app, a plug-in device for your OBD-II port, or your vehicle's built-in connected-car system. The data typically includes mileage, time of day driven, braking, acceleration, cornering, speed patterns, and often location. Some programs can identify phone use while driving.

Before opting into a telematics program

Read the full terms, not just the discount offer. Can the data result in a surcharge or non-renewal, not just a discount?
Ask whether the data is shared with third parties beyond your insurance company
Check whether the data persists after you cancel the program or switch insurers
Understand what the program actually measures. A program that penalizes late-night driving may not work for shift workers
Compare the potential discount against the data you are trading. A 5 to 15 percent discount may not justify continuous location tracking

The OBD-II port

The On-Board Diagnostics (OBD-II) port, typically located under the dashboard near the steering column, provides direct access to your vehicle's computer systems. It is used by mechanics for diagnostics, by emissions testing stations for inspections, and by some insurance telematics devices. Any device plugged into your OBD-II port can potentially read vehicle speed, engine RPM, diagnostic trouble codes, fuel system data, and other operating parameters. Be aware of what is plugged into your OBD-II port and who has access to the data it provides.

Steps to protect your vehicle data

1

Review your connected services settings

Most vehicles with connected services have a settings menu where you can control what data is collected and shared. Look in your infotainment system under Privacy, Data Sharing, or Connected Services. Disable any sharing you are not comfortable with.

2

Check your manufacturer's privacy portal

Most major automakers now have a privacy request portal where you can view what data has been collected, request a copy of your data, or request deletion. Search for "[your car brand] privacy request" to find the relevant page.

3

Be selective about telematics opt-ins

Do not accept telematics programs automatically. Read the terms, understand what data is collected, how it is used, who sees it, and whether it can affect your insurance negatively as well as positively.

4

Know your OBD-II port

Be aware of any device plugged into your OBD-II port that you did not install. If a loaner device from an insurance program or fleet management company is still plugged in, remove it when the program ends.

5

When selling, factory-reset your vehicle

Before selling or trading your vehicle, perform a factory reset on the infotainment system to remove your personal data, including paired phones, saved addresses, garage door codes, and any stored account credentials. Remove the vehicle from your manufacturer's connected services account.

The regulatory landscape is changing

Multiple states introduced telematics-specific privacy legislation during the 2025-2026 sessions. The National Association of Insurance Commissioners (NAIC) is drafting model law amendments covering consumer consent, data minimization, and limits on selling driving data. Federal legislation has been proposed but not yet enacted. This is one of the fastest-moving areas of consumer privacy law, and the protections available to you will depend on your state and the year. Your state attorney general's office is the best resource for current rules in your jurisdiction.

Access to your own vehicle

Right to repair and independent access.

As vehicles become more software-dependent, the question of who can access the data and diagnostic tools needed to repair them has become a consumer rights issue. The right-to-repair movement aims to ensure that vehicle owners and independent repair shops retain meaningful access to the tools and information needed to service modern vehicles.

The access problem

A 2024 industry survey found that 51 percent of independent repair shops reported sending up to five vehicles per month to dealerships due to data restrictions. Sixty-three percent of shops surveyed experienced restrictions on repair data daily or weekly. These restrictions cost independent repair shops an estimated $3.1 billion per year and reduce consumer choice by funneling repair work to dealership service departments.

Federal and state action

In 2021, the FTC voted unanimously to prioritize enforcement against illegal repair restrictions, and the agency has pursued actions against manufacturers that conditioned warranties on using authorized service providers. Massachusetts's right-to-repair law, broadened through a ballot initiative in 2020, requires automakers to provide independent shops with wireless access to vehicle telematics data. Federal legislation (the REPAIR Act) has been proposed to extend similar requirements nationwide.

For vehicle owners, the practical takeaway is this: you have the legal right to choose where your vehicle is repaired. No manufacturer can require you to use their dealership for routine maintenance or common repairs. Your warranty cannot be voided solely because you chose an independent shop. And if you are told otherwise, that claim is worth questioning and, if necessary, reporting to the FTC or your state attorney general.

Related guides

Keep building.

Vehicle Ownership