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Bmw 320i e91. Works as described. Worked for my bmw e90. Seems to be doing the trick.

Didn't do much except a hole in my wallet.

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This product had a total of 87 reviews as of our last analysis date on Jun 16 2022.

The AI used to provide these results are constantly improving. These results might change.

Posted by a reviewer on Amazon

It has helped a bit but not as much as other online reviews have promised

Posted by a reviewer on Amazon

It helped a great deal for something small

Posted by a reviewer on Amazon

Was told possible valve stem seal