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Splendid diy - yesterday, my car threw CDBF and 2b57, which I presumed is the Throttle Actuator for bank 1. My Zurich warranty said it's not covered as it's not an 'internally lubricated' part! I promptly placed an order for a replacement one yet this morning the codes were gone. I will be following this guide if the codes ever return.
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2015 K46 S1KRR 
2008 E90 M3  |