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Service bulletins for the 2018 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.

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

Warranty extensions
B0103242026-05-18. 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.
B6501222025-01-23. AIR BAGS. The limited warranty for the Knee Air Bag wire harness repair cable procedure for defects in materials and / or workmanship has been extended to 10 years / 120,000 miles as determined from the original first in-service / delivery date.
B0115242024-12-31. ENGINE. the NVLD limited emissionrelated warranty for defects in materials or workmanship has been extended to 15 years/150,000 miles as determined from the original in-service date.
B0109212024-12-31. ENGINE. The NVLD limited emission related warranty for defects in materials or workmanship has been extended to 15 years/150,000 miles as determined from the original in-service date.
B0103242024-05-31. ENGINE. EVAP SYSTEM PURGE (VENT) VALVE EXT LTD WTY (ELW) 15/150

A warranty extension may pay for a repair after the basic warranty has ended. Read the document for which vehicles and which repair it covers.

By type

By component

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.
B6617192025-05-02. Service bulletin. SERVICE BRAKES. The vehicle applies the brakes on its own when reversing onto an inclined roadway or driveway. This appliesonly to the situation where the Active PDC option is activated via the iDrive.
B6501222025-01-23. Warranty extension. AIR BAGS. The limited warranty for the Knee Air Bag wire harness repair cable procedure for defects in materials and / or workmanship has been extended to 10 years / 120,000 miles as determined from the original first in-service / delivery date.
B0115242024-12-31. Warranty extension. ENGINE. the NVLD limited emissionrelated warranty for defects in materials or workmanship has been extended to 15 years/150,000 miles as determined from the original in-service date.
B0109212024-12-31. Warranty extension. ENGINE. The NVLD limited emission related warranty for defects in materials or workmanship has been extended to 15 years/150,000 miles as determined from the original in-service date.
B0103242024-05-31. Warranty extension. ENGINE. EVAP SYSTEM PURGE (VENT) VALVE EXT LTD WTY (ELW) 15/150
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.
B3101222024-04-01. Service bulletin. SUSPENSION. During inspection and/or diagnosis there is noticeable dirt/grease buildup on the axles near the inner and/o router CV boots.
B6304182024-04-01. Service bulletin. EXTERIOR LIGHTING. One or more of the LED daytime running lights are dim or discolored.
B5108192024-02-01. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS; ELECTRICAL SYSTEM. The basic conditions for initializing the power windows are not met.
B1701222024-02-01. Service bulletin. ENGINE AND ENGINE COOLING. The Check Control message below appears even though the coolant level is not below minimum when theengine is cold. Check Control message (ID 166): Top up coolant.
B6113052024-02-01. Service bulletin. ELECTRICAL SYSTEM. The electrical system of BMW vehicles has been subject to an ongoing development process over the last few years. This has led to increased demands being placed on the battery. This document covers important information for the dealer on how to handle “discharged battery” complaints.
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.
B3601212024-02-01. Service bulletin. STEERING. At low outside temperatures (below 40 degrees F) and slow driving speeds (i.e. when parking, maneuvering)with a large steering angle, the front end can be slightly axially misaligned. This can be felt (jerking)/ heard via an acoustic acknowledgement (clunk) as seen at the 11 second mark of the video. See attached video V36 01 21.
B3101242024-02-01. Service bulletin. SUSPENSION. With the vehicle is on a lift and the front struts are in the extended position, there may be a cracking and orclicking type noise when turning the steering wheel left/right. See attached video V31 01 24. The sound can reoccur when the vehicle is lowered, and the wheels are once again under load. The noise might also be heard for a short time while driving.
B5218232024-01-03. Service bulletin. SEATS. A noise can be heard from underneath the seat while the seat is being moved either forwards or backwards. This can occur to the driver’s and/or the passenger’s front seat.
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
B6528232023-10-01. Service bulletin. EQUIPMENT. Customers may be experiencing one or more of these following issues with Bluetooth operation: Bluetooth cannot be switched on or off in the head unit (HU-H4) Paired mobile devices cannot be deleted Customer is unable to make phone calls or stream music with mobile device Customer is unable to connect a new mobile device via Bluetooth Mobile device does not automatically reconnect via Bluetooth in the next drive cycle (after short sleep cycle)
B6515232023-06-26. Service bulletin. ELECTRICAL SYSTEM. After programming the head unit (HU-H2), activating the FSC (German word Freischaltcode) Enabling Codes repeatedly fails.
B6504142022-12-12. Service bulletin. LANE DEPARTURE; UNKNOWN OR OTHER; AIR BAGS; SEATS:BARRIERS; BACK OVER PREVENTION. 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.
B6627192022-10-31. Service bulletin. LANE DEPARTURE. The Lane Change Warning (LCW) yellow triangle symbol on either one, or both the exterior side view mirrors does not illuminate to alert the driver when it should.
B6624192022-10-31. Service bulletin. EQUIPMENT:ELECTRICAL. Vehicle cannot be opened or closed using comfort access, engine start is not possible, and the vehicle may not start when placing the key against the steering column.
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.
SIB6509222022-10-17. Service bulletin. EQUIPMENT:ELECTRICAL. The sound output intermittently drops out entirely. This can be reproduced with all audio sources as well as telephone and voice output.
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)

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