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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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Old 11-11-2007, 09:49 AM   #1 (permalink)
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What is my engine code? '03 325i

I looked on the bavauto site for the code, but it doesn't seem to include my year. Is it an M50 or M52? Thanks. And a link to a current engine code list would be greatly appreciated. I'm also curious to know my auto tranny (steptronic) manufacturer and code...
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Old 11-11-2007, 10:08 AM   #2 (permalink)
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BMW model and engine codes

From this list it seems I'm an M50? 2.5L 6 cyl dual overhead cam without variable intake? I wondered how the 330i got several more horses - variable intake (M52)?

ZF 6HP06 - Is this my transmission?

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Old 11-18-2007, 09:16 PM   #3 (permalink)
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Further searching and I now think the engine code is M54B25. Any confirmation?
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Old 11-19-2007, 09:44 PM   #4 (permalink)
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Yes, your engine code is M54-B25.
Regarding transmission-most likely your car is equipped with a "Hydramatic" 5L40-E unit, made by GM Strasbourg,France or less likely German ZF 5HP19.
To make sure get under your car and check the label on side of the transmission.
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Old 11-20-2007, 04:27 PM   #5 (permalink)
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Thank you!
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Old 11-20-2007, 06:01 PM   #6 (permalink)
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Old 11-20-2007, 07:08 PM   #7 (permalink)
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Bookmarked - thanks again.
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