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Service bulletin B520718

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 id10153704
Published by NHTSA2019-02-25
Manufacturer's numberB520718
Manufacturer's date2018-12-01
NHTSA componentSEATS

NHTSA's summary

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.

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 228I2014, 2015, 2016
BMW 230I2017, 2018
BMW 320I2013, 2014, 2015, 2016, 2017
BMW 328D2014, 2015, 2016, 2017
BMW 328I2012, 2013, 2014, 2015, 2016
BMW 330E2016, 2017
BMW 330I2017
BMW 335I2012, 2013, 2014, 2015, 2016, 2017
BMW 340I2016, 2017
BMW 428I2014, 2015, 2016
BMW 430I2017, 2018
BMW 435I2014, 2015, 2016
BMW 440I2017, 2018
BMW ACTIVE HYBRID 32013
BMW ACTIVE HYBRID 32014, 2015
BMW M22016, 2017, 2018
BMW M235I2014, 2015, 2016
BMW M240I2017, 2018

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

Recalls for the same vehicles and component
12V1760002012-04-20. SEATS:FRONT ASSEMBLY:HEAD RESTRAINT

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
B5201212023-09-25. Service bulletin. ?The front seat will not calibrate/initialize, and the stored faults cannot be deleted.
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.
B5201212021-08-09. Service bulletin. Front seat will not calibrate/initialize, and the stored faults cannot be deleted
B5133162021-08-09. Service bulletin. Water sloshing noises coming from the rear passenger compartment (left or right) while driving Water ingress in the luggage compartment, or in the rear passenger compartment- rear seat bench rear passenger compartment foot well rear passenger compartment side panel Failure of various control units installed in the area of the water removal channel
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.
B5201212021-03-15. Service bulletin. SEAT FAILS TO INITIALIZE DUE TO MISSING END STOP: Front seat will not calibrate/initialize.
B5133162019-08-19. Service bulletin. LOSHING NOISES/WATER IN REAR PASSENGER COMPARTMENT: This Service Information bulletin replaces SI B51 33 16 dated August 2016.
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.
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.
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.