When you’re getting collision repair, the choice of parts matters more than people realize. Here’s an honest breakdown of OEM vs aftermarket vs reconditioned parts, and when each is right.
The Three Types of Parts
1. OEM, Original Equipment Manufacturer
OEM parts are made by or for the vehicle’s manufacturer, to the exact specifications of the factory part. A Toyota OEM fender is identical to the fender that was on the car when it left the factory.
Pros:
- Tested to manufacturer crash standards
- Guaranteed fit and finish
- Backed by manufacturer warranty
- Maintain your vehicle’s factory safety engineering
Cons:
- Most expensive option
- Sometimes longer lead time
2. Aftermarket / CAPA-Certified
Aftermarket parts are made by third-party manufacturers to fit a specific vehicle. Quality varies enormously.
CAPA (Certified Automotive Parts Association) is the most-recognized certification, these parts are tested to specific standards. Non-CAPA aftermarket parts can range from “almost as good as OEM” to “barely fits and rusts in 6 months.”
Pros:
- 30–60% less expensive than OEM
- Often available immediately
Cons:
- Fit and finish vary (worse on lower-end aftermarket)
- May not be tested to OEM crash standards
- Different materials (sometimes thinner steel, different plastic formulations)
- May affect ADAS sensor performance (especially bumpers with radar mounting points)
3. LKQ / Recycled / Used OEM
LKQ = Like Kind and Quality. These are used OEM parts pulled from totaled vehicles. The same factory part, just used.
Pros:
- Cheaper than new OEM
- Same factory engineering and crash standards
- Better fit than aftermarket
Cons:
- May have wear, minor damage, or fading
- Color matching requires refinish
- Inspect carefully for hidden damage
Which Parts Need to Be OEM (No Compromise)
Structural Parts
- Frame rails
- Strut towers
- Apron / inner fenders
- Floor pans
- Reinforcements (front, rear, side)
Aftermarket structural parts often use different steel grades or thicknesses. In a future crash, your vehicle’s crumple zones won’t perform the way they were engineered to.
Safety Components
- Airbags and SRS components
- Seatbelts and pretensioners
- Bumper reinforcements (the steel/foam absorbers behind the cover)
- Side-impact beams (in doors)
- ADAS sensors, cameras, and radar
These have safety-critical performance characteristics that aftermarket parts often don’t meet.
Parts That Hold Sensors
- Front bumper covers on vehicles with radar/sensors
- Grilles with adaptive cruise control radar
- Windshields with lane-keep cameras
- Side mirrors with blind-spot radar
The reason: aftermarket bumpers and grilles can have small dimensional differences that affect how the radar “sees” the road. Even a 2mm offset can cause ADAS misfires.
Where Aftermarket Is Usually Fine
- Cosmetic exterior trim
- Door mirror covers (non-radar models)
- Wheel arch moldings
- Some headlight assemblies (CAPA-certified, well-known brands)
- Tail light assemblies (CAPA-certified)
- Hood and trunk emblems
- Step bars and running boards on trucks
Where LKQ (Used OEM) Is a Great Option
- Quarter panels (sectioning is common in major repairs anyway)
- Hoods (often pulled from low-mileage donors)
- Doors and door shells
- Trunk lids
- Wheels (when matching factory wheels matters)
How to Push Back When Insurance Wants Aftermarket
Most insurance companies write initial estimates with aftermarket or LKQ parts to minimize claim cost. For safety and structural components, you can push back:
- Cite the manufacturer’s repair procedure. Most manufacturers publish repair manuals that specify OEM parts for safety components. We document this for the adjuster.
- Reference your policy. Many policies have “OEM parts” coverage for newer vehicles (often 0–3 years old). Check your policy or call your agent.
- Document the safety implications. Aftermarket airbags, structural parts, and ADAS-related parts have well-documented safety differences.
- Escalate to a supervisor. If the front-line adjuster won’t authorize, the supervisor often will.
- California Department of Insurance. For genuine refusals on safety parts, file a complaint at insurance.ca.gov.
We do this work on every repair where it’s needed, at no cost to you. It’s part of what you’re paying for when you choose a shop that works for you, not the insurer.
The Bottom Line
- Always OEM on structural, safety, and ADAS-adjacent components.
- LKQ acceptable for matched body panels (hood, doors, quarter panels) when the donor is clean.
- Aftermarket acceptable for cosmetic trim and some non-safety parts, only well-known CAPA-certified brands.
- Push the insurer for the right parts when they try to default to the cheapest option.
Get a free estimate, we’ll explain the parts strategy for your specific repair.