Skip the auto shop - Our mechanics make house calls

Q: Rebuilt & replaced engine confirmation

asked by on

Hello I recently had a replaced and rebuilt engine put into my vehicle and I would like to know how I can confirm that it is a different engine than the one originally placed in the vehicle. I've heard that the vin number on the rebuilt engine should NOT match the VIN number on the dashboard. Is this correct?

A: Hi and thank you for contacting YourMechani...

Hi and thank you for contacting YourMechanic. Yes, you are correct. If the repair shop that performed the work claimed they "replaced" your engine then the serial number on the engine block will be different. If the engine was "rebuilt" then the serial number will be the same if the rebuilt the engine that already existed in the engine. You should be able to contact your local dealer and they can do a build search for you to obtain how the car came off the assembly line, including the original serial number from the engine. If you are not the original owner (if you are the 2nd -3rd owner etc.), this could make it very difficult to prove due to the vehicle being in possession of the another owner who could have also replaced the engine.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Does the VIN number have to be in the ECM for the vehicle to run?

Some new ECMs will give you a certain amount of free starts before it will not start unless the VIN is added. I am not sure if this is the case with your ECM but you have a dealer telling...

Q: What is the cost for complete engine replace? 2005 Nissan Maxima

Hi - unfortunately, this is not a service YourMechanic can offer at this time. Thanks for thinking of us!

Q: Won't move drive reverse

Hi! The screeching sound you're talking about sounds like a worn drive belt and the scraping sound will likely be related to the brakes of the vehicle. I suggest that you have a technician overlook the vehicle and specifically inspect the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...