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F10 / F11 (2011 - 2016)
The sixth generation of the BMW 5 Series Sedan (F10) was produced from 2011 - 2016 with LCI updates arriving in 2014. In the US BMW offered a hatchback 5 Series Gran Truismo (F07) and the rest of the world also go a Station Wagon/Touring version F11.

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Old 03-13-2016, 08:54 AM
Armyfazer Armyfazer is offline
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Location: South Louisiana
Join Date: May 2014
Posts: 16
Mein Auto:
550 Battery eater

I've been reading up on the strain that this car is putting on the battery. There has even been some mention of dealers changing the battery at each oil change. Has anyone looked at using some type of battery tender for the car to extend the battery life? Yes, it is rather grating to have to consider that on a car in this price range, but that is another discussion.
So, has anyone done it and does anyone know of any possible negative consequences from keeping it on a trickle charge while parked?
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Old 03-13-2016, 11:47 AM
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Me530 Me530 is online now
Happily Driving
Location: Illinois
Join Date: Feb 2005
Posts: 6,185
Mein Auto: 2014 550i M Sport
Keeping your battery on a battery tender (not a trickle charge) is always a good idea with any BMW. The drain on the battery doesn't stop when you shut down the car. Although the electronics go into deep sleep, there is still power drain. In warm weather, engine cooling system continues to run after you shut down the ignition to protect the turbo's. A battery tender is especially important if you don't drive your car regularly or only for short distances. If you are on the fence, just get the tender, it's cheap, and it will dramatically extend the life of your $200+ battery. There are no downsides to the battery tender unless it gets struck by lightning while your charge is plugged into it.
2014 550i M Sport, European Delivery May 2014
2013 X3 35i, Dealer Delivery July 2012

Gone, but not forgotten:
2006 530i
, European Delivery June 2005
2008 335i Coupe 6MT, PCD November 2007
2011 550i M Sport, European Delivery May 2011

BMWCCA #350568

Last edited by Me530; 03-13-2016 at 11:48 AM.
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Old 03-13-2016, 11:54 AM
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ExGMan ExGMan is offline
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Location: Brookline, MA, USA
Join Date: Jan 2005
Posts: 235
Mein Auto: 2015 535d X-Drive
I have used a battery maintainer called an Optimate-6 on BMWs I've owned. At present, I put the battery maintainer to use any time I expect the 2015 535d is going to be idle for three days or more. I use a smaller Optimate-4 on my 2015 BMW R1200RT motorcycle whenever it's not being ridden.
John Gamel
Chestnut Hill, MA
2007 530xi - sold
2015 535dx - current
2008 R1200RT - sold
2015 R1200RT - current
BMW CCA - 2006 - present
BMW MOA - 2009 - present
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Old 03-13-2016, 06:44 PM
Armyfazer Armyfazer is offline
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Location: South Louisiana
Join Date: May 2014
Posts: 16
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Thanks. That what I was thinking. Cheap insurance.
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Old 03-15-2016, 11:34 AM
Gilgorm Gilgorm is offline
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Location: Toronto, Canada
Join Date: Jul 2012
Posts: 577
Mein Auto: 2012 535i X-drive
I already had a 2A/15A/100A battery charger when I first got my 2012 F10. (Previous E60 was a battery killer). I have had to use it approximately 6-7 times (usually in the winter). I only use it when the car has the message: High Battery Discharge Warning" displayed. Even then the battery is still able to start the car with no problems. A charger/tender is an excellent idea, especially for cars with low mileage and long periods of inactivity.
Personally, I only use the charger when required as noted above.
2012 BMW 535i X-drive; Space Grey/Black Dakota, Fineline; Executive (Auto trunk, NAV, HiFi Prof, Lumbar, Rear Cam, SIRIUS, Voice), Technology (Blind Spot, Hi-Beam Assist, Lane Departure, Surround View), APPS, Rear heated seats, Tint.
Retired: 78 300D, 81 300SD, 87 190E, 88 Porsche 924, 89 260E, 93 300E, 97 Volvo 850, 98 E320, 03 BMW 325iT, 02 C230 Sport Coupe, 08 BMW 535i
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