Engine Originality Checker

Is Your Engine
Factory Original?

Search over one million factory build records across more than 50 vehicle series — from early AP Airflows through to the final CM Chryslers. Can't find yours? Our FREE Registration puts our team to work finding the answer for you.

1M+
Build Records
50+
Series Covered
Free
If We Can't Confirm It

Check Your Engine

Enter your vehicle details exactly as they appear on the compliance plate and engine stamp.

Up to 5 digits from your compliance plate — pad with leading zeros if shorter (e.g. 123 becomes 00123)

Please enter exactly 5 digits

Capitals only, no spaces, dashes or asterisks — stamped on the block where the distributor shaft enters. If it begins with CD, enter D only

Please enter an engine number

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Congratulations — Original Motor!

The engine number you entered matches the factory-assigned motor for your . You have a genuine numbers-matching vehicle — highly sought after by collectors.

Want the full factory specification for your car? Order a Specification Sheet report — factory options, colour codes, build details and more.

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Engine Doesn't Match Factory Records

The engine number entered doesn't appear to be the original factory-fitted motor for this . The engine may have been replaced at some point — not uncommon in classic cars.

Register your vehicle and we can help you track down the original engine or verify your car's full factory history.

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Duplicate Record in Build Data

There is a duplicate entry in the original Chrysler factory build data for this . This is a known anomaly from the original build records. Please contact us so we can verify your vehicle's details manually.

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Confirmation Data Still Pending

We don't yet have confirmed data on file for this vehicle. Our database is continually updated as vehicles are verified. Register your vehicle to be notified when data becomes available.

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Engine Data Not Yet Available

Unfortunately, at this stage we are unable to confirm whether your engine number is original or not — we have your vehicle on record but our build data for this series does not yet include engine numbers.

But it's not all bad news! This is a great time to do a FREE Registration. By registering your vehicle, you help us build a more complete picture of surviving cars — and if your engine turns out to belong to another vehicle, that information is genuinely valuable to another owner out there looking for theirs.

We'll contact you the moment we have information that relates to your car.