What Is OEM Parts Coverage?

OEM stands for Original Equipment Manufacturer — meaning the parts are made directly by your vehicle's manufacturer to exact factory specifications. OEM parts coverage is an optional endorsement you add to your auto insurance policy that instructs your insurer to use only those factory-original parts when repairing your vehicle after a covered loss.

Without this endorsement, most standard auto insurance policies allow — and often prefer — aftermarket parts. These are components made by independent, third-party companies. While they may be functionally similar, they're not made by your car's manufacturer and can vary significantly in quality, fit, and compatibility. Learn more about how car manufacturer insurance programs factor OEM parts into their coverage models.

OEM vs. Aftermarket Parts: What's the Difference?

Understanding the distinction between these two types of parts is key to deciding whether this endorsement is right for you.

Aftermarket parts aren't inherently bad — many meet CAPA (Certified Automotive Parts Association) or NSF International standards. CAPA independently tests parts for weld integrity, corrosion resistance, paint adhesion, and fitment to ensure they match OEM-level performance. CAPA-certified parts are generally safer and more reliable than non-certified aftermarket options. However, for structural, safety-critical, or tech-heavy components, consistency matters — and that's where OEM has a clear edge.

How Standard Policies Handle Parts — And What Changes With an Endorsement

By default, most auto insurance policies give the insurer the right to use "like kind and quality" parts, which in practice means aftermarket components. Insurers prefer this because aftermarket parts can cost 20–50% less than OEM equivalents — savings they protect, not necessarily you.

When you add an OEM parts endorsement, the dynamic shifts. Your insurer is now contractually obligated to use factory-original parts for covered repairs, as long as those parts are available. If OEM parts aren't available, some insurers will cover the cost difference to source them, while others will fall back to aftermarket.

Coverage Duration Tiers

Some insurers offer tiered OEM coverage based on your vehicle's age:

• Standard OEM Coverage — Typically applies to vehicles within the 3–5 most recent model years
• Extended OEM Coverage — Applies to vehicles up to 10 model years old (e.g., Liberty Mutual covers private passenger autos 10 years old or newer with comprehensive and collision coverage)
• Lifetime OEM Coverage — Applies as long as OEM parts are available, regardless of model year (offered by select insurers like The Hanover)

A Notable Legislative Development

In December 2025, Ohio introduced House Bill 636 — the Auto Insurance Transparency Act — which, if passed, would require auto insurers to clearly offer policyholders an OEM parts coverage option and mandate written disclosures whenever non-OEM parts are used in repair estimates. The bill was introduced on December 23, 2025, by Rep. Mark Johnson and was referred to the Ohio House Insurance Committee. As of April 2026, it remains in the "Introduced" stage with no committee hearings or votes recorded. This signals a growing consumer-driven push for more transparency in how insurers handle parts choices during claims — a trend worth watching nationwide. You can also learn more about car manufacturer insurance programs and how OEM parts policies vary by brand.

Benefits of OEM Parts Coverage and Who Should Get It

For the right driver, OEM parts coverage can be a smart financial decision — not just a premium luxury. Here's who benefits most:

New and late-model vehicles benefit because OEM parts preserve the exact engineering and safety standards the car was built with. Leased vehicles often require OEM repairs under lease agreement terms — using aftermarket parts could result in financial penalties at lease return. Luxury vehicles (think BMW, Mercedes, or Audi) have precision engineering and proprietary technology built into components that generic aftermarket parts simply can't replicate reliably.

Electric vehicles like Tesla models are prime candidates. Tesla OEM parts purchased directly from Tesla carry a 12-month or 12,500-mile Parts, Body & Paint Repair Limited Warranty, with longer terms for specific items like touchscreens. For 2026 model year Teslas, a High-Priced Propulsion-Related Parts ZEV Limited Warranty of 7 years or 70,000 miles covers costly EV components like the Power Conversion System, high-voltage controllers, cooling systems, and related harnesses. EV-specific components involve complex battery systems, high-voltage safety protocols, and software integration — areas where using non-OEM parts doesn't just reduce quality, it can put your warranty coverage at risk. Learn more about Tesla and OEM manufacturer insurance programs to see how these programs intersect with parts coverage.

How Much Does OEM Parts Coverage Cost — and Which Insurers Offer It?

OEM parts coverage typically adds $5–$20 per month ($60–$240 per year) to your auto insurance premium. The exact amount depends on your vehicle's make, model, year, and your location. This cost is increasingly worth locking in: tariffs implemented since May 2025 — including a 25% levy on imported vehicles and parts — have already driven OEM retail parts prices up 2.1% from Q1 to Q2 2025, compared to just 1% the prior year. Roughly 44% of OEM collision repair parts are produced outside the U.S., meaning tariff pressure continues to push OEM costs higher. Aftermarket parts prices have remained comparatively flat, but for the vehicles and situations outlined above, quality and warranty protection tip the balance toward OEM coverage.

Insurers That Offer OEM Parts Coverage (2026)

Not every insurer offers this endorsement in every state. Availability may also be restricted to vehicles under a certain age (commonly 5–10 model years). Always confirm with your agent whether the endorsement is available for your specific vehicle.

Is OEM Parts Coverage Worth the Cost?

Here's a simple way to think about it: if your vehicle is worth significantly more than your deductible and you plan to keep it for several more years, the added protection of OEM coverage is likely worth the premium. If you're driving an older, high-mileage vehicle, the math probably doesn't work in your favor.

With tariff-driven parts inflation accelerating into 2026 — OEM parts costs already rising faster than in prior years — locking in OEM coverage now could protect you from even steeper out-of-pocket costs during a future claim. If you've also made aftermarket upgrades to your vehicle, consider pairing OEM coverage with custom parts & equipment (CPE) coverage to protect both factory and custom components.

Frequently Asked Questions

Does standard car insurance cover OEM parts?

No — standard auto insurance policies typically allow insurers to use aftermarket or "like kind and quality" parts when repairing your vehicle. This keeps claim costs lower for the insurer, not for you. To guarantee OEM parts are used, you must add an OEM parts endorsement — also called an OEM rider or original parts replacement coverage — to your policy for an additional premium of $5–$20 per month. Some states, like Ohio, are actively considering legislation (HB 636) to require insurers to offer this option more transparently to consumers.

Will using aftermarket parts void my car's warranty?

Under the federal Magnuson-Moss Warranty Act, a manufacturer cannot void your warranty simply because aftermarket parts were used — they must prove the aftermarket part directly caused the damage. However, this can lead to disputes and delays in warranty claims. For electric vehicles like Tesla, which tie specific extended warranties to OEM parts and Tesla-authorized repairs, using non-OEM parts can directly jeopardize warranty eligibility on propulsion-related components. Using OEM parts eliminates this risk entirely.

Are OEM parts always better than aftermarket parts?

Not always. For critical safety systems, structural components, and high-tech features — especially in EVs and luxury vehicles — OEM parts are strongly recommended. For cosmetic repairs like a bumper cover or side mirror housing, a quality CAPA-certified aftermarket part may perform comparably at a lower cost. CAPA certification involves factory inspections, material testing, and ongoing quality audits, including decertifications when parts fail to meet standards. The key is knowing which components matter most for safety, warranty protection, and long-term vehicle integrity.

Can I request OEM parts even if I don't have the endorsement?

Yes, but you'll likely pay the difference out of pocket. If your insurer approves an aftermarket part at $400 but the OEM equivalent costs $700, you would need to cover the $300 gap yourself. In some states, insurers must disclose which type of parts they plan to use — and Ohio's proposed HB 636 would formalize this requirement statewide, including requiring written repair estimates to identify all non-OEM parts and note OEM availability. Having the endorsement removes the guesswork and the extra expense during what is already a stressful claims process.

Which vehicles benefit the most from OEM parts coverage?

New vehicles (under 5 years old), leased cars, luxury vehicles, and electric vehicles benefit the most from OEM parts coverage. These vehicles rely on precision-engineered components that are difficult to replicate reliably with aftermarket alternatives. EVs in particular — like 2026 Tesla models — have proprietary battery, propulsion, and high-voltage electrical systems that require OEM parts for safe, software-compatible, and warranty-compliant repairs. If your vehicle falls into any of these categories, the endorsement cost of $60–$240 per year is usually well justified given today's rising repair costs driven by tariffs on imported auto components.