Dealer Service is Not Required to Protect Your New Car Warranty

January 4, 2015

A silver car is driving down a road | Doctor of Motors

What is a warranty?

A warranty is a promise, often made by a manufacturer, to stand behind its product or to fix certain defects or malfunctions over a period of time. The warranty pays for any covered repairs or part replacements during the warranty period.

If you own a car, you know how important it is to keep up with routine maintenance and repairs. But can a dealer refuse to honor the warranty that came with your new car if someone else does the routine maintenance or repairs?

The Federal Trade Commission (FTC), the nation’s consumer protection agency, says no. In fact, it’s illegal for a dealer to deny your warranty coverage simply because you had routine maintenance or repairs performed by someone else. Routine maintenance often includes oil changes, tire rotations, belt replacement, fluid checks and flushes, new brake pads, and inspections. Maintenance schedules vary by vehicle make, model and year; the best source of information about routine scheduled maintenance is your owner’s manual.

Do I have to use the dealer for repairs and maintenance to keep my warranty in effect?

No. An independent mechanic, a retail chain shop, or even you yourself can do routine maintenance and repairs on your vehicle. In fact, the Magnuson-Moss Warranty Act, which is enforced by the FTC, makes it illegal for manufacturers or dealers to claim that your warranty is void or to deny coverage under your warranty simply because someone other than the dealer did the work.

That said, there may be certain situations where a repair may not be covered. For example, if you or your mechanic replaced a belt improperly and your engine is damaged as a result, your manufacturer or dealer may deny responsibility for fixing the engine under the warranty. However, according to the FTC, the manufacturer or dealer must be able to demonstrate that it was the improper belt replacement — rather than some other defect — that caused the damage to your engine. The warranty would still be in effect for other parts of your car.

Will using ‘aftermarket’ or recycled parts void my warranty?

No. An ‘aftermarket’ part is a part made by a company other than the vehicle manufacturer or the original equipment manufacturer. A ‘recycled’ part is a part that was made for and installed in a new vehicle by the manufacturer or the original equipment manufacturer, and later removed from the vehicle and made available for resale or reuse. Simply using an aftermarket or recycled part does not void your warranty.

The Magnuson-Moss Warranty Act makes it illegal for companies to void your warranty or deny coverage under the warranty simply because you used an aftermarket or recycled part. Still, if it turns out that the aftermarket or recycled part was itself defective or wasn’t installed correctly, and it causes damage to another part that is covered under the warranty, the manufacturer or dealer has the right to deny coverage for that part and charge you for any repairs.

The FTC says the manufacturer or dealer must show that the aftermarket or recycled part caused the need for repairs before denying warranty coverage.

Tips To Avoid Warranty Issues

Here’s how to get the most out of your vehicle’s warranty:

  • Read your warranty. Often bundled with your owner’s manual, the warranty gives a general description and specific details about your coverage. If you have misplaced your owner’s manual, look for it online. Check the “Owners” section of your manufacturer’s website.
  • Be aware of your warranty period. If problems arise that are covered under the warranty, get them checked out before the warranty expires.
  • Service your car at regular intervals. This is a good idea in any case. But for the sake of keeping your warranty intact, follow the manufacturer’s recommended service schedule. Details are in your owner’s manual.
  • Keep all service records and receipts, regardless of who performs the service. This includes oil changes, tire rotations, belt replacement, new brake pads, and inspections. Create a file to keep track of repairs; it will come in handy if you have to use your warranty. If you ever have a warranty claim and it appears that you did not maintain your vehicle, your claim could be denied.
Why Your Car’s Power Windows Are Sluggish in Cold Weather | Doctor of Motors
December 19, 2025
Doctor of Motors in Chico, CA, explains why power windows can become sluggish in cold weather and what that means for the system.
5 Car Damages That Can Occur After Running Out of Gas | Doctor of Motors
December 15, 2025
Doctor of Motors in Chico, CA, explains five ways your vehicle can be damaged if you run it out of fuel.
What Happens When Your Car's Engine Mounts Are Worn Out | Doctor of Motors
December 14, 2025
Doctor of Motors in Chico, CA, explains what happens when your car’s engine mounts wear out and the signs you shouldn’t ignore.
What That Knocking Noise From the Engine Means | Doctor of Motors
December 13, 2025
Doctor of Motors in Chico, CA, explains the causes of engine knocking noises and what they mean for your car’s health.
What Is a Coolant Flush and Why Does My Car Need One? | Doctor of Motors
December 12, 2025
Doctor of Motors in Chico, CA, explains the importance of coolant flushes and how they protect your engine from damage.
What Does the Alternator Do in My Car? | Doctor of Motors
December 11, 2025
Doctor of Motors in Chico, CA, explains the vital role your alternator plays in keeping your vehicle’s electrical system running.
A man is kneeling down holding a tire in a garage | Doctor of Motors
June 27, 2025
Doctor of Motors in Chico, CA, outlines four major benefits of regular tire rotation and why it should be part of your routine maintenance.
A black car with a diagram of the engine on the hood | Doctor of Motors
May 23, 2025
Doctor of Motors in Chico, CA, explains why your car may shake during acceleration and what could be causing it.
A close up of a car engine with the hood up | Doctor of Motors
December 13, 2017
Radiator and Coolant Host: Okay, Robert, let’s talk about radiators, radiator flushing. I’ve always wondered about that. Flushing the ...
A man is standing next to a jeep on the side of a road | Doctor of Motors
December 13, 2017
Comprehensive Auto Insurance and Mechanical Damage Host: Robert, I think what you were saying is a lot of people don’t realize that if ...