Hello tous !
Apparement le moteur utilisé par la 750, qui est le N63, à une très mauvaise réputation,
au point que les américains ont lancé une "class action" afin de porter plainte contre BMW,
d'ailleurs c'est simple, des que je tape sur google "engine N63 problem", la liste est énorme !
voici certains de ces liens :
http://www.carcomplaints.com/news/2015/bmw-n63-engine-lawsuit-oil-consumption-battery-problems.shtml
http://www.autoevolution.com/news/bmw-44-liter-n63-engine-experiencing-frequent-reliability-problems-88225.html
http://www.topspeed.com/cars/car-news/bmw-n63-customer-care-package-a-recall-that-bmw-refuses-to-call-a-recall-ar166918.html
http://www.clublexus.com/forums/car-chat/770714-bmw-n63-customer-care-package-a-recall-that-bmw-refuses-to-call-a-recall.html
On December 29th, 2014, BMW released Bulletin "B001314" or the "N63 Customer Care Package " affecting any vehicle that saw use of the 4.4-liter V-8 (N63B44O0) within the 5 Series, 6 Series, 7 Series, X5, and X6 model lines manufactured between 2008 and 2013. Dealership instructions include checking the timing chain for stretching and replacing it if necessary, replacing the fuel injectors, mass air flow sensors, crankcase vent lines, battery, engine vacuum pump and low pressure fuel sensor.
The sweeping recall also extended to vehicles that had gone out of warranty, no matter how many miles were accumulated on the vehicle.
Additionally, the service interval would be shortened to nearly half, with a 12 month/10,000 mile (16,000 km) check-up instead of the long-life treatment the BMW had been maintaining up to that point, requiring a check every 2 years and 15,000 miles (25,000 km).
In June of 2013, dealerships had received a service bulletin regards to the N63 powerplant, which amended the oil capacity requirements of the engine, adding a full (1) US quart to the capacity of the motor, citing "increased oil consumption" in the twin turbo V8.
Models affected by the recall included:
F01 and F02 (7 Series Sedan)– produced from 3/2009 to 6/2012
F04 (Active Hybrid 7)– produced from 4/2010 to 6/2012
F07 (Gran Turismo)– produced from 9/2009 to 6/2012
F10 (5 Series Sedan)– produced from 3/2010 to 7/2013
F12 (6 Series Convertible)– produced from 3/2011 to 7/2012
F13 (6 Series Coupe)– produced from 7/2011 to 7/2012
E70 (X5)– produced from 3/2010 to 6/2013
E71 (X6)– produced from 7/2008 to 6/2014
E72 (ActiveHybrid X6)– produced from 9/2009 to 9/2011
The dealership bulletin was accompanied by region sales rep meetings with branch/service managers, informing of them of the forthcoming campaign, and issuing instructions to contact all owners serviced at their branches operating the N63 engine. The accompanying marketing campaign, which would be a major focus of 2015 for BMW world-wide, was intended to dampen the affect of such a wide spread recall on BMW's waining brand loyalty and customer service issues. The tactics of which could be seen in the extended efforts surrounding the recall.
BMW dealerships were instructed to offer extra incentives for owners affected by this campaign, offering trade-in cash bonuses for their N63 equipped vehicles with the purchase of a new BMW (details in a separate sales bulletin - "N63 Customer Loyalty Offer" ). Sales teams were also provided with discretionary authorization to provide customers with a gift of $50 value, including anything from a gas card, gift bag containing BMW Lifestyle products, or vehicle detailing.
Ce qui est vraiment fou, c'est que je ne trouve absolument rien sur les forum BMW France !
bon il faut dire que la 750 F01 est très rependu sur le sol français !