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Service bulletin B370115

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 id10156210
Published by NHTSA2019-04-01
Manufacturer's numberB370115
Manufacturer's date2015-04-01
NHTSA componentSUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM; SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM:LINES AND FITTINGS

NHTSA's summary

Service Action: Replace Left Rear Air Spring. Torsional stress can cause the threaded fabric of the left air spring bellow to rupture and lose its airtightness. If the air spring is not airtight, the vehicle will lean on one side.

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

Suspension, Air suspension

Vehicles listed
BMW 535I2013, 2014, 2015, 2016
BMW 535I GRAN TURISMO2010, 2011, 2012 (the catalog's model; the bulletin names a series or trim of it)
BMW 550I2013, 2014, 2015, 2016
BMW 550I GRAN TURISMO2010, 2011, 2012 (the catalog's model; the bulletin names a series or trim of it)

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
B3701152019-04-08. Service bulletin. Service Action: Replace Left Rear Air Spring. Torsional stress can cause the threaded fabric of the left air spring bellow to rupture and lose its airtightness. If the air spring is not airtight, the vehicle will lean on one side.
B3701152018-12-10. Service bulletin. Service Action: Replace Left Rear Air Spring. Torsional stress can cause the threaded fabric of the left air spring bellow to rupture and lose its airtightness. If the air spring is not airtight, the vehicle will lean on one side.