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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 12-31-2009, 07:26 AM   #1 (permalink)
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Angry 530d auto loss of power

Had this car since new 5 years ago, 50k miles on the clock. On starting and until full temp is reached the car seems to have "normal " power. But when fully warm it lacks power. Put foot down and the engine responds kicking down but very slow change in speed. Have taken it to a dealer who checked it out and found nothing wrong so am taking it back...would appreciate any ideas. The turbo seems to be working during warm up. Coincidently I took it for its first major oil chnage when the oil filter was replaced. It behaved normally on the way back from the garage but shortly after it started. Have tried premium diesel. Thanks!
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Old 12-31-2009, 07:49 AM   #2 (permalink)
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Sounds to me like the boost pressure sensor is on its way out.
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Old 12-31-2009, 08:00 AM   #3 (permalink)
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marti5, thanks a lot. I'll look into that.
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Old 01-26-2010, 06:59 AM   #4 (permalink)
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Power Loss 530d

Thanks for help on this. It turned out to be the turbo which was replaced by the dealer, also the change in engine noise I have noticed for a long time may have been linked to an exhaust valve that was replaced. Good news is that BMW paid for half the parts, the mileage was 50k.
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Old 01-26-2010, 07:15 AM   #5 (permalink)
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Thats great news, glad your all sorted..
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