Said It Here

Are parts interchangeable across different car makes and models?

Finding out if a component from a donor vehicle can be swapped directly into a different make or model usually requires comparing part numbers or cross-referencing platforms by hand. Without a clear compatibility guide, it is difficult to know if parts like wiper motors or drivetrain components will bolt on without modification.

Overview
People affected3 accounts across 1 forum
Workarounds found6 items attempted
Community agreement3 total upvotes

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

Found another way around this?

Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.

  1. 1
    Searching junkyard parts or trying to cross-reference part numbers manually.
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  2. 2
    Taking the vehicle to multiple shops for diagnosis
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  3. 3
    Sourcing used donor parts from a different model and researching part interchangeability online
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  4. 4
    Using parts diagrams websites like realoem.com
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  5. 5
    Checking fitment confirmation through reputable auto parts sellers like FCP Euro and ECS Tuning
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  6. 6
    Coding the replaced module to the car's immobilizer system
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Tried another approach not listed above?+ Share your workaround ↑

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.

r/MechanicAdvice3 people · September 2026

“I have a 2013 Acura ILX with a wiper motor that has a faulty park switch (linkage is fine, motor just keeps running endlessly). I was thinking to pick up a junkyard wiper motor, but was wondering if the civics from the era have an interchangeable part.”source ↗

guyman70718 · r/MechanicAdvice · 1 upvotes

“I've noticed a whining/grinding/friction noise from the rear thats worse at lower speeds and worse when not applying the accelerator.”source ↗

“Can this be a direct swap onto my car with the donor Haldex unit + carrier?”source ↗

“Are the part numbers interchangeable?”source ↗

yazzd · r/MechanicAdvice · 1 upvotes

“I’m switching out the reader for my key fob in my bmw 2006 330i and I don’t know if these part numbers are interchangeable”source ↗

ethan762x51 · r/MechanicAdvice · 1 upvotes

Where this came up

People with this problem also raised