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The BMW Range
3 Series
E90, E91, E92, E93
E90 parts & maintenance
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<blockquote data-quote="bobbychoo" data-source="post: 709952" data-attributes="member: 42654"><p>Just to share...</p><p></p><p>Felt the N52 engine juddering only at speeds above 120kmph (occasionally). As suspected, misfiring <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" /></p><p></p><p>Took it to Super Excel Car Service at Transfer Road, Penang to get diagnosed.</p><p></p><p>Changed one ignition coil (Bosch 0 221 504 470) as cylinder 5 was misfiring. Also changed all 6 spark plugs (Bosch FR 7 NPP332). Parts and labor costed RM350.00 and 2.5 hours.</p><p></p><p>As a result, the engine was performing much smooth at speeds below 40kmph. Before the change, the engine was slightly rough even at zero throttle.</p></blockquote><p></p>
[QUOTE="bobbychoo, post: 709952, member: 42654"] Just to share... Felt the N52 engine juddering only at speeds above 120kmph (occasionally). As suspected, misfiring :( Took it to Super Excel Car Service at Transfer Road, Penang to get diagnosed. Changed one ignition coil (Bosch 0 221 504 470) as cylinder 5 was misfiring. Also changed all 6 spark plugs (Bosch FR 7 NPP332). Parts and labor costed RM350.00 and 2.5 hours. As a result, the engine was performing much smooth at speeds below 40kmph. Before the change, the engine was slightly rough even at zero throttle. [/QUOTE]
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