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      09-24-2012, 02:25 PM   #8
Wrngway
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Drives: '11 328i Sedan A6
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Quote:
Originally Posted by slowturbo View Post
Dumb question, but how do we know without getting under the car whether or not we have the n51 motor?
Under your hood you'll see a emissions sticker. It'll state "SULEV" for N51 cars and "ULEV" for N52. You can also go to realoem.com and input the last 7 digits of your VIN.

FYI...N51 cars also have the 3-stage intake manifold and slightly lower compression ratio along with some other small differences.
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