OEM vs Aftermarket Parts: What New York Law Says About Your Repair

Somewhere in the middle of a claim, the estimate comes back and a line item has changed. Where it said a genuine manufacturer part, it now says “A/M” or “Qual Repl” or “aftermarket.” Nobody called to discuss it. This is one of the most common points of friction in a collision claim in New York, and most people have no idea they are allowed to push back.

The three kinds of parts

OEM – Original Equipment Manufacturer. The part your car was built with, bought through the dealer network, in the manufacturer’s box. It fits because it is the same part.

Aftermarket – made by a third party to resemble the original. Quality ranges from genuinely good to visibly wrong. Fit, thickness of steel, crumple behavior and corrosion coating can all differ from the original, and none of that is visible once the panel is painted.

Used, recycled or LKQ – a genuine manufacturer part taken from another vehicle. Insurers propose these frequently, and for a genuinely discontinued part they are sometimes the only option that exists.

What New York actually requires

New York’s regulations on claim settlement require that an insurer disclose when non-original parts are being specified. The estimate has to identify them – they cannot simply appear as an unlabeled substitution. That disclosure requirement exists precisely because the difference is not visible in a finished repair.

Separately, and more usefully, New York Insurance Law § 2610 establishes that the insurer cannot require the repair be done at a particular shop. That matters here because the shop writing the repair plan is the one arguing for the parts strategy. A shop chosen by the insurer and a shop chosen by you are not always arguing for the same thing.

What New York does not do is guarantee you OEM parts on every claim. Your policy language governs. Most standard policies allow the insurer to specify parts of “like kind and quality.” The argument, when there is one, is about whether a given aftermarket part genuinely meets that standard for that repair.

When the difference genuinely matters

It is not true that aftermarket is always wrong. It is true that there are specific places where it causes real problems.

Structural and crash-relevant components. Bumper reinforcements, crush cans, radiator supports, rails. These parts are engineered to deform in a particular sequence at a particular load. A part that looks the same and deforms differently changes how the car behaves in the next collision.

Anything a sensor mounts to. Modern cars have radar behind the bumper, cameras in the windshield and mirrors, and ultrasonic sensors in the fascia. If the mounting geometry is a few millimeters off, calibration either fails or, worse, succeeds at the wrong reference. This is the fastest-growing category of aftermarket problem.

Aluminum and mixed-material panels. Bonding and rivet procedures are specified by the manufacturer for a specific substrate. A part of different alloy or thickness is not the part the procedure was written for.

Exterior panels on cars where resale is sensitive to it. On premium and enthusiast vehicles, a documented aftermarket panel is something a future buyer’s inspector will find and price in. That loss is real and it belongs in the diminished value conversation.

Where insurers push hardest: interior trim, brackets, bolt-on components and glass — the items that look inconsequential on an estimate line. Some of them genuinely are. The problem is that the same logic then gets applied to a bumper reinforcement or a sensor bracket, where it is not inconsequential at all, and by then the argument has already been conceded.

How the conversation actually goes

The insurer specifies an aftermarket part. The shop writes a supplement explaining why the factory repair procedure calls for the original part in this application – because a sensor mounts to it, because the bonding procedure specifies that substrate, because the manufacturer’s certification program requires it on that vehicle.

That last point does real work. Where a vehicle is repaired under a manufacturer’s certification program, the procedures that come with it frequently specify genuine parts for structural and safety-related components. That is not the shop’s preference, it is the documented procedure, and documented procedure is what moves adjusters.

Where the insurer holds firm, you have a decision to make and you should make it with the numbers in front of you rather than at the counter on collection day. A shop that documents the procedure gives you that. A shop that fits whatever the estimate says does not.

What to do when you see it on your estimate

1. Read the parts column. Look for A/M, AM, Qual Repl, Opt OEM, Recycled or LKQ. Anything not marked OEM is a substitution.
2. Ask what each substituted part does. Structural? Sensor mounting? Neither?
3. Ask the shop, not the insurer, whether the factory procedure permits it.
4. Get the answer in writing on the supplement. If a claim becomes a dispute later, the documentation is the case.
5. Keep the final parts invoices. They are part of what a diminished value claim rests on, and part of what protects you at resale.

Common questions

Can I insist on OEM parts in New York?

You can insist; whether the insurer must pay depends on your policy language. Some policies include OEM parts endorsements. Where the policy allows substitution, the practical route is a documented argument from the manufacturer’s repair procedure rather than a general preference.

Does using aftermarket parts void my manufacturer warranty?

It does not void the whole warranty, but a manufacturer is not obliged to cover a failure caused by a non-original part. The practical risk sits with the part and whatever it affects.

Are recycled OEM parts a good option?

A part from a donor vehicle is a genuine manufacturer part, and for some components an insurer will propose one. The questions to ask are condition, mileage and whether it has itself been repaired before. For our own repairs we fit new original parts from the dealer.

Will aftermarket parts show up when I sell the car?

The repair will appear on vehicle history services. A thorough pre-purchase inspection will identify non-original panels. On a premium car, assume a serious buyer will find out.

Who decides in the end?

You do, because you own the car and you choose the shop. The insurer decides what it will pay for. Those are different decisions, and the gap between them is yours to close or accept.

This article is general information about how parts are specified in New York collision claims and is not legal advice. Your policy language governs your specific claim.

Where we stand

Enthusiast Auto Works fits new original parts from the manufacturer’s dealer network. Not aftermarket, and not used parts off a donor car. That is a shop policy rather than a position we take case by case, and it is the main reason people bring us cars the insurer wanted sent somewhere else.

We also tell the insurer this before the estimate is written rather than fighting about it afterwards, which is why it rarely becomes a dispute at all. Where a carrier does push back, we write the repair plan from the manufacturer’s published procedure, attach the relevant pages to the supplement and make the case for the original part — which wins far more often than owners expect, because documented procedure moves adjusters and opinion does not. If they still will not pay, our first move is to find a way to make the repair work without you going out of pocket. If we cannot, we call you, explain exactly where the claim stands, and you decide. What does not happen is an aftermarket panel going quietly onto your car.

Certified for auto body with Land Rover, Jaguar, Rivian, Genesis, Infiniti, Nissan, Kia and Stellantis, and equipped for every other premium marque, at 55B Plain Ave, New Rochelle, serving Westchester, the Bronx and lower Fairfield County. Call (914) 630-1668 or send us the details below.