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Service bulletin B520412

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10147878
Published by NHTSA2018-11-13
Manufacturer's numberB520412
Manufacturer's date2015-12-01
NHTSA componentSEATS

NHTSA's summary

Front Seat Base Makes Noise. A noise may be heard from the left or right front seat base when driving on rough roads. CAUSE The riveting of the seat control bracket to the metal seat base is too loose.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Seats

Vehicles listed
BMW 528I2011, 2012, 2013, 2014, 2015, 2016
BMW 535D2014, 2015, 2016
BMW 535I2011, 2012, 2013, 2014, 2015, 2016
BMW 535I GRAN TURISMO2010, 2011, 2012 (the catalog's model; the bulletin names a series or trim of it)
BMW 535I US2011 (the catalog's model; the bulletin names a series or trim of it)
BMW 550I2011, 2012, 2013, 2014, 2015, 2016
BMW 550I GRAN TURISMO2010, 2011, 2012 (the catalog's model; the bulletin names a series or trim of it)
BMW 740I2012, 2013, 2014, 2015
BMW 740I US2011 (the catalog's model; the bulletin names a series or trim of it)
BMW 740LD2015
BMW 740LI2011, 2012, 2013, 2014, 2015
BMW 750I2009, 2010, 2011, 2012, 2013, 2014, 2015
BMW 750LI2009, 2010, 2011, 2012, 2013, 2014, 2015
BMW 760LI2010, 2011, 2012
BMW 760LI2014, 2015
BMW ACTIVE HYBRID 32012
BMW ACTIVE HYBRID 32015
BMW ACTIVE HYBRID 52013
BMW ACTIVE HYBRID 72012
BMW ACTIVE HYBRID 72014
BMW ACTIVEHYBRID 72011
BMW M52013, 2014, 2015, 2016

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
15V7180002015-10-30. CHILD SEAT; SEATS:MID/REAR ASSEMBLY

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
B6504142022-12-12. Service bulletin. According to the customer, the airbag warning light was on, but it may not be illuminated when the vehicle arrives in the workshop. 1. ACSM fault code "930A60 - Seat occupancy detection, front passenger; malfunction" is stored. The fault may or may not currently be present. Or 2. ACSM fault code "930A1C - Front passenger seat occupancy detection transmitting fault(moisture)" is stored. The fault may or may not currently be present.
B1103212021-07-06. Service bulletin. B58 ENGINE: ENGINE OIL FILTER REMOVAL PROCEDURE AND TOOLS . A. For the B58 engines, a BMW Oil Catch special tool for use in conjunction with removing the engine oilfilter insert is now available.
B5207182019-02-25. Service bulletin. SEAT THIGH SUPPORT UPHOLSTERY IS PROTRUDING. The upholstery may dislodge slightly from the thigh support base over time from repeated compression due to normal use.
B5208182019-02-25. Service bulletin. FRONT PASSENGER SEAT SPORADIC MOVEMENT. Occasional stopping of seat adjustability movement in the driver and front passenger seats when occupied.
6511132018-12-03. Service bulletin. Installation of a new CIS (capacitive sensing passenger occupancy mat) will not enable with ISTA/P. Wrong coding in the spare part from the supplier
6521132018-11-13. Service bulletin. When Unlocking with Comfort Access the Outside Door Mirrors Are in the Wrong Position. The vehicle is locked with one remote key and then enters sleep mode. The vehicle is then unlocked using one of the outside door handles with the second remote key. The outside door mirrors do not move to the correct position. The seats do move into the correct position. CAUSE Software error in driver's seat module
B5204172018-11-05. Service bulletin. BACKREST NOISES WHEN UNDER LOAD. Pop noise coming from seat backrest when pressure exerted toward rear or while pulling away from a stop. Friction between top right rivet holding lordosis (back Lumbar support) valve block and backrest cushion spring.
B5209162018-11-05. Service bulletin. ?REAR SEAT RATTLE . Rear bench seat backrest rattles when driving on uneven roads. Rear bench seatback rattles between the attachment points and retaining clip contact surfaces.
B5203172018-11-05. Service bulletin. ?MISSING AUDIO NOTIFICATION WHEN STORING SEAT MEMORY . When saving seat memory settings (Memory 1 or Memory 2) with a vehicle without navigation, there is no audio tone confirmation. Software error in control unit of Seat Module 2.
B5203182018-10-09. Service bulletin. MEMORY SEAT ADJUSTMENT IS LIMITED: After programming the vehicle with ISTA 4.10.2x, the adjustment range of the memory seat may restricted.