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-   -   AT in engine number (http://986forum.com/forums/boxster-general-discussions/86903-engine-number.html)

scalest 02-11-2025 08:25 AM
AT in engine number
 
I have a 2002 Boxster (Base) and the engine serial number has AT in it. Actual number is:
M96/22AT65265202.
I read several posts in this forum that indicated the AT means it was a porsche rebuilt engine. Is that indeed true? I am asking because I am trying to understand when/if it has the newer IMS bearings.

JFP in PA 02-11-2025 09:01 AM
AT indicates that it is a factory rebuilt engine. Which IMS bearing is in it depends upon WHEN it was rebuilt.

scalest 02-11-2025 05:50 PM
JFt
 
JFT many thanks for confirmation. Is there any way to determine when the engine was rebuilt/replaced? I went to a Prosche dealer nearby and they were really useless.

JFP in PA 02-12-2025 06:00 AM
Engine serial numbers have 8 digits.

1st digit - No of Cylinders

2nd digit - Engine Version

3rd digit - Model Year

4th-8th digit - Serial Number


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