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7 Series - E65 / E66 (2002 - 2008)
Discussion of BMW's 4th generation E65/E66 7 Series flagship. The E65 generated much controversy, due to its radical styling and iDrive user difficulties. Nonetheless, the E65 broke records to become the best-selling 7-series iteration ever, especially after its 2005 facelift.

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Old 03-08-2017, 11:10 PM
Hadrian017 Hadrian017 is offline
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Location: Malta
Join Date: Mar 2017
Posts: 1
Mein Auto: E39 530d
How relaiable are the 730d

I am looking to buy an e66 sport 2007 3.0d

I currently drive a 2003 bmw 530d e39 which is rock solid and giving me not a single problem at all.

What are common issues of the e66 and how are they compared to the 530d e39?

Any opinion apriciated.

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Old 03-09-2017, 07:13 AM
mathat mathat is offline
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Location: norfolk
Join Date: Feb 2015
Posts: 104
Mein Auto: 730d
I have had 2 x e39's , my last one 525 2002 did many miles 240000 without any real problems (I had it for the last 160000) most annoying was the brakes pipes that rusted on the back - this is why I got the 730d as the engine is the same, so far I have done 20000 miles and I have had to fix ...

thermostats main 3 times and other once - each time it broke the engine fills up with diesel as the regen fails (so my car has had lot's of services)
6 glowplugs (as they are on all the time they break quickly) + glow plug relay
gearbox oil and filter + do-nut- but problems still exist
steering angle sensor many times still not fixed as I have found no way apart from taking it into BMW
front brakes (distorted) - rear brakes and handbrake
rear bearing (hard to find so I changed prop-shaft bearing first)
this year it needs (from MOT) front suspension arm and rear brake pipes corroded (AGAIN nightmare job)

so to summarize - great engine but two many electrical nightmares
sometimes I wish I had an A8 which was my other choice - also I don't think this car is as smooth or as quite as it should be / also if I went back I would have got a 520d
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