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The BMW Range
3 Series
E46
M54 2.2 low rev engine knocking
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<blockquote data-quote="Herbert" data-source="post: 745439" data-attributes="member: 18029"><p>Check your catalytic converter as I had experienced similar low knocking sound with my e39 m54. The materials inside the cat converter has gone brittle & disintegrated hence causing the sound whenever you rev the engine.</p></blockquote><p></p>
[QUOTE="Herbert, post: 745439, member: 18029"] Check your catalytic converter as I had experienced similar low knocking sound with my e39 m54. The materials inside the cat converter has gone brittle & disintegrated hence causing the sound whenever you rev the engine. [/QUOTE]
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The BMW Range
3 Series
E46
M54 2.2 low rev engine knocking
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