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Service bulletins for the 2023 BMW Z4

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.

36 on file from NHTSA, as of 2026-10-19.

By type

By component

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
B0103242026-05-18. Warranty extension. ENGINE. The EVAP systems purge (vent) valve limited warranty for defects in materials or workmanship has been extended to 15 years / 150,000 miles as determined from the original in-service date.
B5112192024-08-02. Service bulletin. ENGINE. A check control message or MIL (Malfunction Indicator Lamp) may be illuminated, with one or more of thefollowing faults stored: 138207 - Active cooling damper control (AKKS), top: blockage at warm ambient temperature 21B043 - Active cooling damper control (AKKS), top: blockage at all ambient temperatures 138222 - Active cooling damper control (AKKS), above: positional deviation error detected at warm ambienttemperature 138209 - Active cooling damper control (AKKS), top: Control deviation at all ambient temperatures 13822B - Active cooling damper control (AKKS), top: Control deviation at all ambient temperatures 21B042 - Active cooling damper control (AKKS), below: blockage at all ambient temperatures 138206 - Active cooling damper control (AKKS), bottom, blockage at warm ambient temperature 138225- Active air-flap control, bottom: top limit position not detected 138224- Active air-flap control, bottom: bottom limit position not detected
SIB1201232023-05-15. Service bulletin. ENGINE AND ENGINE COOLING. In hot ambient conditions, if the engine was running for a prolonged time while the vehicle is stationary, a jolt may be experienced while lightly accelerating.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.