A factory warranty is a big perk when you buy a new or certified pre-owned vehicle. It offers peace of mind by covering the cost of repairs for certain parts and systems during a specific time or mileage window. But what many drivers don’t realize is that warranties can be voided—sometimes by simple mistakes that seem harmless at the time.

If you want to keep your warranty intact and avoid paying out-of-pocket for repairs that should be covered, it’s important to know what not to do. Here are five common missteps that can accidentally void your warranty.

1. Skipping Scheduled Maintenance

Your vehicle's warranty depends on you keeping up with basic maintenance. That includes oil changes, fluid flushes, filter replacements, and inspections outlined in your owner's manual. Failing to follow the manufacturer’s maintenance schedule can give them grounds to deny a warranty claim.

It’s not just about doing the maintenance—it’s also about documenting it. If your engine develops a problem and you can’t show proof that the oil was changed regularly, the manufacturer may claim that neglect caused the issue.

At Precision Automotive Service NY, we always provide detailed service records so you’ll have the documentation you need, should a warranty issue arise.

2. Using the Wrong Fluids or Parts

Today’s vehicles are designed to work with very specific types of oil, transmission fluid, coolant, and other components. Using a cheaper or incompatible product might save money in the short term, but it can damage the engine or other systems, and void your warranty.

The same goes for replacement parts. Installing a low-quality aftermarket part that causes a failure may give the manufacturer a reason to deny coverage. If you're unsure whether a fluid or part is approved for your vehicle, check the manual or consult a shop that works with your make and model regularly.

3. Performing Unauthorized Modifications

That aftermarket exhaust, performance tuner, or lift kit might look cool or make your car sound better, but it can also affect your warranty. If a modification is installed improperly or causes added stress on parts the warranty covers, you could be stuck with the repair bill.

Even something as simple as larger wheels or suspension tweaks can lead to warranty concerns, especially if they alter how the vehicle handles or wears.

This doesn’t mean you can’t customize your car, but it’s important to know what’s allowed and how to do it without compromising your coverage. We’ve had customers in Endicott come in after modding their vehicle only to learn the dealer won’t cover related repairs anymore.

4. Ignoring Warning Lights or Symptoms

If a check engine light comes on or your car starts making a strange noise, putting off the repair might seem like no big deal. But delaying service after a warning sign can make the problem worse, and the manufacturer might refuse to cover it if they believe continued driving caused additional damage.

Acting quickly not only protects your car but also shows that you’ve made a good-faith effort to preserve its condition under the terms of the warranty.

5. Getting Repairs From an Unqualified Shop

You don’t have to go to the dealership for service, but you do need to make sure that whoever works on your car knows what they’re doing and uses the correct parts. Poor workmanship or incorrect installation can lead to problems that won’t be covered under your warranty.

At Precision Automotive Service NY, our team follows the right procedures and uses approved parts, so you don’t have to worry about jeopardizing your coverage. We understand what manufacturers expect, and we help our customers stay in compliance with their warranty terms.

Precision Automotive Service NY – Protecting Your Warranty in Endicott, NY

If you're not sure whether a certain repair, upgrade, or service decision could affect your vehicle’s warranty, ask us before you proceed. At Precision Automotive Service NY, we help Endicott drivers avoid costly mistakes and keep their warranties valid for as long as possible. Stop by or give us a call if you have questions—we’re here to keep your car covered and running right.