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1991 BMW 525i

Question: Which way does the air filter go? Not entirely obvious.

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AdamD2012, Boise, ID, January 11, 2012, 14:33
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Don't have the owners manual, finding a repair manual is expensive. It's not entirely obvious with the air filter going in vertical rather than horizontal on these models.

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  • Answer #1

    csubak30 January 12, 2012, 00:16
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     Master

    The end with 'ribs' on it faces toward the direction of air coming in from outside. The flat side faces toward the air intake of the engine.

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