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Service bulletins for the 2021 BMW X4

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.

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

By type

By component

Only bulletins with component: Glass, wipers and mirrors are shown. Show all

Bulletins, newest first
B6404222024-03-02. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. An interference noise (groaning noise) can be heard from within the heating and air-conditioning unit in thecenter of the instrument panel. The groaning noise always occurs when either a ventilation flap, air stratification flap or the recirculated airflap moves to a different position. Due to the complex design of the heating and air-conditioning unit, the kinematics causing it (top or bottom,left or right) may not be able to be precisely located. Depending on the vehicle model, the number of servomotors (and the associated kinematics unit) varies.Various models use either 2 or 3 servomotors.
B5108192024-02-01. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS; ELECTRICAL SYSTEM. The basic conditions for initializing the power windows are not met.
B5404212023-11-01. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY; STRUCTURE. This situation can result in two customer complaints: 1. Wind noise 2. Excess water entry
B6102202023-09-25. Service bulletin. VISIBILITY:WINDSHIELD; VISIBILITY:WINDSHIELD WIPER/WASHER; STRUCTURE. ?When driving over uneven pavement or cobblestones, a knocking noise is present from the passenger side front area (A pillar). Once the vehicle is driven on a flat, even surface; the noise is no longer present.
B5401232023-09-25. Service bulletin. STRUCTURE; VISIBILITY:SUN/MOON ROOF ASSEMBLY. ?Water leaking into the vehicle from the headliner/microphone area.
B5117222023-06-26. Service bulletin. VISIBILITY:REARVIEW MIRRORS/DEVICES; ELECTRICAL SYSTEM. Due to the semiconductor supply, the Local Interconnect Network module in either of the exterior mirrors was switched to another controller. That one provides an imprecise voltage measurement, which the main controller interprets as a fault.
B5108232023-06-26. Service bulletin. VISIBILITY. Upon opening or closing (i.e., folding in or out) the exterior mirror assembly, a creaking sound is heard from either the driver and/or passenger side.
SIB5117222023-05-15. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM; VISIBILITY:REARVIEW MIRRORS/DEVICES:EXTERIOR. Due to the semiconductor supply, the Local Interconnect Network module in either of the exterior mirrors was switched to another controller.
B6112222022-12-12. Service bulletin. VISIBILITY. After opening the vehicle with the radio remote control and changing the profile, the exterior mirror settings are lost.
B5117222022-12-12. Service bulletin. FORWARD COLLISION AVOIDANCE; VISIBILITY; LANE DEPARTURE; STEERING; ELECTRICAL SYSTEM. Due to the semiconductor supply, the Local Interconnect Network module in either of the exterior mirrors was switched to another controller. That one provides an imprecise voltage measurement, which the main controller interprets as a fault. For the driving cycle, the customer may lose the display in either mirror and the Lane Change Warning function and, if installed, other functions such as- Side collision warning; Lane Change Assistant; Steering and Lane Control Assistant; Emergency Lane Assistant Hands Off 60 Assistant.
B6404222022-10-31. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. An interference noise (groaning noise) can be heard from within the heating and air-conditioning unit in the center of the instrument panel.
B5404212022-10-31. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. The front sunroof glass seal has shrunk, creating a gap which can cause wind noise or excess water entry.
B6106222022-05-31. Service bulletin. VISIBILITY/WIPER. No actuation of front and rear windscreen wipers is possible.
B6401212022-05-31. Service bulletin. ENGINE; EQUIPMENT; VISIBILITY:SUN/MOON ROOF ASSEMBLY. A whistling noise is present from the fresh air inlet area (engine compartment bulkhead area), in the right front area of the vehicle, at speeds above 40 mph. The noise is loudest when the sunroof is in the vent position.
B6401212022-05-16. Service bulletin. STRUCTURE; VISIBILITY:SUN/MOON ROOF ASSEMBLY. A whistling noise is present from the fresh air inlet area (engine compartment bulkhead area), in the right front area of the vehicle, at speeds above 40 mph. The noise is loudest when the sunroof is in the vent position.
B6403212021-12-20. Service bulletin. EQUIPMENT; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. After replacing the microfilter during a previous service, the customer notices that the ventilation system airflow rate is noticeably less.
B5411192021-04-26. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. SUNROOF WATER LEAK DIAGNOSIS: This bulletin outlines multiple known areas of possible water entry for the vehicles listed above.
B5403202021-04-26. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. SUNROOF NOT INITIALIZED: During operation, the sunroof may have lost initialization due to extended activation of the switch.
B5104212021-03-15. Service bulletin. VISIBILITY. DOOR PAINT STREAKS: Streaks are found running mostly vertically down along the door outer skin from the lower window trim. This can affect any of the 4 side doors.
B5403202021-02-01. Service bulletin. EQUIPMENT; VISIBILITY. SUNROOF NOT INITIALIZED: The sunroof will not operate and has the following fault codes stored: 030215 - SHD: invalid characteristic curve, no standardization exists and 030220 - SHD: System not standardized and 030295 - invalid characteristic curve, no standardization exists and 0302A0 - Service history: System not standardized. During operation, the sunroof may have lost initialization due to extended activation of the switch.
B6123152020-12-21. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER; EQUIPMENT. Low Washer Fluid Warning Light is illuminated when the Washer Fluid Tank is Full: Low Washer Fluid Warning Light is illuminated when the Washer Fluid Tank is Full.There are no faults stored in the system for the washer fluid level switch.

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