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Service bulletin B520819

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 id10163044
Published by NHTSA2019-07-22
Manufacturer's numberB520819
Manufacturer's date2019-06-01
NHTSA componentSEATS

NHTSA's summary

FRONT SEAT BACKREST MAKES A CRACKING NOISE WHEN FOLDED FORWARD.

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 640I2012, 2013, 2014, 2015, 2016, 2017
BMW 650I2012, 2013, 2014, 2015, 2016, 2017
BMW M62013, 2014, 2015, 2016, 2017

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

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.
B5215192019-11-18. Service bulletin. FRONT SEAT HAS SIDE TO SIDE PLAY AND CAN MAKE NOISES WHEN CORNERING. Either or both of the front seats has side to side (lateral) play, and can make noises when cornering.
B5209192019-07-22. Service bulletin. CRACKING NOISE FROM SEAT BACKREST. Groaning/Cracking noises are heard from the front seat backrest when the vehicle is cornering.
B5207192019-07-22. Service bulletin. NOISE FROM THE FRONT SEATS WHEN ADJUSTING THE SEAT LENGTH.
B5201162018-12-10. Service bulletin. Front Seat Backrests Vibrates on Rough Roads. Both front seat backrests vibrate and rattle while driving over rough roads with the seat in an unloaded condition (no pressure applied on the backrest). Play at the inner backrest pivot point.
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
5201132018-12-03. Service bulletin. "Front Crash-Active Headrest Has Limited Height Adjustment. INFORMATION This bulletin will help you understand the features of the crash-active headrest and explain the benefits to your customers and center staff. 1. Learn the safety features and operation of the front seat and crash-active headrest. Photos A and B: In the event of an accident, the rear passenger must be able to move the front seatback forward, regardless of the seat position. This allows the rear passenger an easy exit from the rear seat of the vehicle, even if the electrical power source is no longer available. 2. When the seatback is manually moved, the headrest must have free movement throughout the full range of the seatback. Photos C and D: The headrest and seatback must be able to move fore and aft without contacting the roof or sun visor, regardless of seat position. The headrest height will automatically adjust to maintain this clearance, regardless of seat position. 3. In case of an accident, the crash-active headrest will be automatically activated forward to reduce the distance between the occupant's head and the headrest. This results in increased safety for the occupant. Photo E shows the headrest in the normal position. Photo F shows the headrest in the ""active"" position and will not contact the roof. Note: The headrest's chrome bar supports can be seen."
5204132018-11-26. Service bulletin. Front Seat Has Side-to-Side Play and Can Make Noises When Cornering. 4.Remove the front seat outer cover panel by pulling the trim forward from the retaining clips. The front seat (driver or/and passenger) has play to the left and right, and can make noises when cornering. CAUSE The front seat base cushion shell is deformed at the cross tube of the tilt adjustment.
M5201132018-11-26. Service bulletin. Front Seat Lumbar Support Not Working. The lumbar support does not function properly or at all for one or both front seats. CAUSE In most cases, the lumbar knob will rotate with limited or no movement of the lumbar support; this is due to a fractured or broken lumbar support.
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