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Old 02-11-2025, 09:25 AM   #1
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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.

Last edited by scalest; 02-11-2025 at 09:27 AM.
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Old 02-11-2025, 10:01 AM   #2
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AT indicates that it is a factory rebuilt engine. Which IMS bearing is in it depends upon WHEN it was rebuilt.
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Old 02-11-2025, 06:50 PM   #3
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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.
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Old 02-12-2025, 07:00 AM   #4
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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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