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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: Body and frame are shown. Show all

Bulletins, newest first
B4107222024-05-03. Service bulletin. STRUCTURE. While driving the vehicle on normal roads at10mph and above, a "cracking" sound from the top of the B-pillar(s) is heard.
B5411192024-02-01. Service bulletin. STRUCTURE. This bulletin outlines known areas of possible water entry, operational noise, or wind noise for the vehicles listed above. It serves only as a diagnostic resource in troubleshooting complaints from the roof area. This bulletin and the associated attachments are designed to provide one single diagnostic resource for troubleshooting all known issues related to the panoramic sunroof of BMW Sports Activity Vehicles which have quality improvement measures already in place.
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
B5118232023-10-01. Service bulletin. STRUCTURE. A groaning noise is heard from the trunk when driving on rough roads.
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.
B4107222023-09-25. Service bulletin. STRUCTURE. While driving the vehicle on normal roads at 10mph and above, a "cracking" sound from the top of the B-pillar(s) is heard.
B1204232023-09-25. Service bulletin. STRUCTURE; EQUIPMENT. ?An unapproved nut was used for the ground point for the chassis ground.
B5146162023-06-26. Service bulletin. STRUCTURE:BODY:TAILGATE. Upon opening and closing the tailgate, a creaking/groaning sound can be heard from tailgate actuator.
B4107222023-05-01. Service bulletin. STRUCTURE:BODY:ROOF AND PILLARS. While driving the vehicle on normal roads at 10mph and above, a cracking sound from the top of the B-pillar(s) is heard.
B6308222023-01-30. Service bulletin. STRUCTURE:BODY:DOOR. Uneven ambient lighting emission (bright spots/dark spots) on the door trim panel.
B4107222023-01-03. Service bulletin. STRUCTURE. While driving the vehicle on normal roads at 10mph and above, a cracking sound from the top of the B-pillar(s) is heard.
B6512222022-12-12. Service bulletin. EQUIPMENT:ELECTRICAL:ANTENNA; STRUCTURE:BODY:ROOF AND PILLARS; UNKNOWN OR OTHER. The seal of the roof-mounted antenna housing is separating from the vehicle.
SIB0112192022-10-17. Service bulletin. STRUCTURE; EQUIPMENT. Component-Specific Limited Warranty Extension. For the eligible vehicles, BMW of North America, LLC (BMW NA) is extending the limited warranty for the vehicle's Radiator Grille Upper and Lower Active Air Flaps to: 15 years/150,000 miles as determined by the vehicle's original in-service date. 1. Air flap control (link) active, upper (G12, G30 and G32) 2. Air flap control (drive), active, upper 3. Air flaps, upper (assembly) 4. Air flaps, lower (assembly) For eligible MY 2017 BMW 530i (B460) vehicles that are currently registered in the State of California (CA) or a State that has fully adopted the State of California PZEV/SULEV regulation (CT, ME, MD, MA, NJ, NY, RI, and VT), the standard emission-related coverage for the Radiator Front Grille Air Vent Flaps is15 years/150,000 miles. This component-specific limited warranty extension applies to defects in materials or workmanship.' This coverage is subject to the same vehicle eligibility requirements, limitations, and exclusions that apply to the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks. A check control message or MIL (Malfunction Indicator Lamp) may be illuminated with faults stored related to the upper and/or lower active air flap(s). Potential causes include: Faulty upper air flap link (G12, G30, G32) Faulty upper air flap actuator (G01, G02, G12, G30, G32) Faulty upper flap assembly (G01, G02, G12, G30, G32) Faulty lower air flap assembly (G01, G02, G12, G30, G32) Software error in the DME affecting the upper flap (G01, G02 only) Or: Upon visual inspection, the passenger side upper active air flaps are either stuck open or closed, and they will not move and there are no faults stored for the active air flaps (With no check control message or check engine light or displaying)
SIB5107222022-07-05. Service bulletin. STRUCTURE. This bulletin outlines known areas of possible functional issues, operational noise, or wind noise for the vehicles listed above. It serves only as a diagnostic resource in troubleshooting complaints pertaining to the doors, windows, and mirrors. This bulletin and the associated attachments are designed to provide one single diagnostic resource for troubleshooting all known issues related to the door, windows, and mirrors of BMW Sports Activity Vehicles which have quality improvement measures already in place.
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.
B5105222022-05-16. Service bulletin. STRUCTURE:BODY. BMW AG has issued a Delivery Stop (effective March 28, 2022) on certain Model Year 2022 BMW vehicles that were produced between February 28, 2022 and March 8, 2022 because the torsion struts were not installed at the plant.
B5411192022-01-24. Service bulletin. STRUCTURE:BODY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin outlines known areas of possible water entry, operational noise, or wind noise for the vehicles listed above. It serves only as a diagnostic resource in troubleshooting complaints from the roof area.
B5404212021-12-20. Service bulletin. STRUCTURE:BODY. This situation can result in 2 customer complaints: 1. Wind noise, and 2. Excess water entry.
B6403212021-08-09. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; STRUCTURE:INTERIOR PANELS:DASHBOARD. After replacing the microfilter during a previous service, the customer notices that the ventilation system airflow rate is noticeably less. This leads to perceived lower cooling power. The customer may also notice that external odors enter the vehicle.
B6305212021-05-24. Service bulletin. STRUCTURE:BODY:DOOR; ELECTRICAL SYSTEM. AMBIENT LIGHT TUBE COLOR DIFFERENCES: The intensity or light throughout the door panel lighting strips is not consistent. Some spots are brighter than others.
B6307202021-02-22. Service bulletin. EQUIPMENT; INTERIOR LIGHTING; STRUCTURE:BODY:DOOR. FRONY DOOR PANEL LED FAILURES: The LED light on the front door is not working. Due to the orientation of the LED module, moisture may enter the LED module, causing corrosion.
B0112192020-11-23. Service bulletin. STRUCTURE. FRONT GRILLE UPPER/LOWER ACTIVE AIR FLAPS: LTD WTY EXT TO 15 YEARS/150,000 MILES: Component-Specific Limited Warranty Extension This component-specific limited warranty extension applies to defects in materials or workmanship. This coverage is subject to the same vehicle eligibility requirements, limitations, and exclusions that apply to the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks. Air flap issues caused by debris/blockage from outside influences is not a defect in materials or workmanship and is not claimable. During the extended limited warranty coverage period (Eligible vehicles that are beyond the 4 year/50,000 mileage New Vehicle Limited Warranty coverage), Active Air Flap cosmetic defect issues are not covered.
B0112192020-11-16. Service bulletin. STRUCTURE:FRAME AND MEMBERS. FRONT GRILLE UPPER/LOWER ACTIVE AIR FLAPS: LTD WTY EXT TO 15 YEARS/150,000 MILES: Component-Specific Limited Warranty Extension This component-specific limited warranty extension applies to defects in materials or workmanship. This coverage is subject to the same vehicle eligibility requirements, limitations, and exclusions that apply to the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks. Air flap issues caused by debris/blockage from outside influences is not a defect in materials or workmanship and is not claimable. During the extended limited warranty coverage period (Eligible vehicles that are beyond the 4 year/50,000 mileage New Vehicle Limited Warranty coverage), Active Air Flap cosmetic defect issues are not covered.
B5121192020-10-19. Service bulletin. STRUCTURE. ACTIVE AIR FLAP FAULT DIAGNOSIS AND REPAIR: A check control message or MIL (Malfunction Indicator Lamp) may be illuminated.

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