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E89 Z4 (2009 - current)

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Old 01-21-2013, 01:57 PM
tranquility tranquility is offline
Sportscars only.
Location: Toronto
Join Date: Apr 2011
Posts: 83
Mein Auto: 2011 Z4 sDrive 35i
Tranny / differential fluids - when to change?

I've asked around the dealerships and also online, but wanted to get feedback from you guys that actually did the above 1 or 2 fluid changes, when you did it, why and at what intervals? Did you look at the old fluid/related parts to see that it was requiring a change? I understand that the tranny fluid is sealed, but still, just because of that, it shouldn't mean 'lifetime'.

I wonder why BMW says these 2 fluids are 'lifetime'? The cynic in me thinks so when the engine/differential 'tears up', they can rack up in service fees. 'Lifetime' can't be true especially for those of us going over 100,000kms/60,000 miles.

Thx in advance.
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