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Service bulletins for the 2018 BMW M4

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.

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

By type

By component

Bulletins, newest first
B3105142019-10-21. Service bulletin. SUSPENSION. Front Suspension Ride Height Has Dropped: The front suspension ride height has dropped on one or both sides due to overload. This is caused by driving over obstacles (e.g. potholes) or an impact severe enough for the front spring strut damper to slip through the clamp of the steering knuckle.
B1110192019-09-23. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). CRANKCASE BEDPLATE DELIVERY STOP: CRANKCASE BEDPLATE. INFORMATION Reimbursement for this Delivery Stop/Repair Action will be via normal claim entry.
B6515192019-09-23. Service bulletin. EQUIPMENT. SECURITY IMPROVEMENTS FOR CONNECTEDDRIVE. Security patches for non-safety critical vulnerabilities in BMW head units Entry Nav Entry Media NBT and NBT EVO.
B6406132019-09-23. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. A/C COOLING: INTERMITTENT REDUCTION OF AIR FLOW This Service Information Bulletin (Revision 9) supersedes SI B64 06 13 dated June 2017. Customer may complain of reduced air flow when the air conditioning system is operated for an extended time usually longer than 30 minutes. The evaporator starts to freeze up due to the position of the evaporator temperature sensor.
B5133162019-08-19. Service bulletin. SEATS:MID/REAR ASSEMBLY; STRUCTURE:BODY. LOSHING NOISES/WATER IN REAR PASSENGER COMPARTMENT: This Service Information bulletin replaces SI B51 33 16 dated August 2016.
B1223192019-08-19. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR; EQUIPMENT:ELECTRICAL. DIAGNOSTIC HINT: CATALYTIC CONVERTER INSPECTION AFTER LOSS OF CRANKSHAFT SIGNAL. In certain situations when the crankshaft position signal is lost while driving the malfunction indicator lamp (MIL) and an engine malfunction check control message (CCM #29) may be displayed. The engine may run roughly or with reduced power.
B1110192019-08-19. Service bulletin. ENGINE. DELIVERY STOP: CRANKCASE BEDPLATE. On affected vehicles the crankcase bedplate may not have been installed correctly.
B6514192019-07-22. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. HEAD UNIT NBT EVO (HU-H2) PROGRAMMING ABORT. During programming several aborts can occur in the head unit NBT EVO (HU-H2).
B6511192019-07-22. Service bulletin. AIR BAGS. Due to an issue during supplier production the driver and/or passenger knee air bags could become damaged during deployment.
B6108192019-07-22. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER:SWITCH/WIRING. Service Information June 2019 General Electrical Systems B61 08 19 Technical Service WINDSHIELD WIPERS SWITCH ON BY THEMSELVES. The windshield wipers switch on by themselves and can no longer be switched off despite activation of the switch. An internal software error in the SZL (steering column switch cluster).
B5409072019-07-22. Service bulletin. STRUCTURE. RETRACTABLE HARDTOP STATUS REQUEST SUPPLEMENT. This Service Information bulletin replaces SI B54 09 07 dated September 2018.
B5209192019-07-22. Service bulletin. SEATS. CRACKING NOISE FROM SEAT BACKREST. Groaning/Cracking noises are heard from the front seat backrest when the vehicle is cornering.
B8407192019-06-24. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. BLUETOOTH CONNECTION IS LOST DURING A PHONE CALL. During an active call the call audio autonomously switches from the vehicle hands-free system to the phone.
B8403112019-06-24. Service bulletin. EQUIPMENT. TELEMATICS CONTROL UNIT ACTIVATION VIA DCSNET FOR BMW ASSIST.
B8402142019-06-24. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. INFORMATION New information provided by this revision is preceded by this symbol. This Service Information bulletin replaces SI B84 02 14 dated September 2018.
B6123152019-05-20. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. The Low Washer Fluid Warning Light is illuminated when the Washer Fluid Tank is Full This Service Information bulletin supersedes SI B61 23 15 dated April 2016.
B6123152019-05-20. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER. The Low Washer Fluid Warning Light is illuminated when the Washer Fluid Tank is Full This Service Information bulletin supersedes SI B61 23 15 dated April 2016.
B8402192019-04-22. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT; ELECTRICAL SYSTEM. PHONE CALL AUDIO AUTONOMOUSLY SWITCH FROM VEHICLE TO PHONE. During an active phone call the call audio autonomously switches from the vehicle hands-free system to the phone.
B6526172019-04-22. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT; ELECTRICAL SYSTEM. NBT EVO CHANGES BETWEEN SELECTIONS BY ITSELF WITHOUT DRIVER INPUT- GHOST BEHAVIOR. The Central Information Display (CID) changes between selections (ghost behavior) and sounds an audio tone without the CID Screen being touched.
B7103182019-03-18. Service bulletin. EQUIPMENT:OTHER:LABELS. SERVICE ACTION REPLACE UNDER HOOD EMISSIONS LABEL. A service action has been issued (effective September 10; 2018) on Model Year 2019 BMW M4 Coupe vehicles that have been produced from July 3-31; 2018. The affected vehicles were equipped with an incorrect emissions label which must be replaced.
B3303182019-02-25. Service bulletin. POWER TRAIN:AXLE ASSEMBLY; SUSPENSION:REAR; WHEELS. KNOCKING NOISE OR VIBRATION/DRONING NOISE FROM THE REAR AXLE. A hard knocking noise is heard from the rear axle area during load reversals. The tuning of the rear suspension mount for the differential.
B3301192019-02-25. Service bulletin. ENGINE; SUSPENSION:MULTIPLE AXLE. DRONING NOISE FROM THE REAR AXLE. A humming/droning noise is heard with vibration during partial to full engine load in higher gears. The tuning of the rear suspension mount for the differential.
B5130182019-02-25. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. GROANING NOISE FROM THE CENTER CONSOLE.
B5125182019-01-07. Service bulletin. STRUCTURE. RATTLE NOISE FROM LOWER A-PILLAR. A rattle noise is present from the lower area of the A-Pillar. Due to a manufacturing error, the bolt securing the front door brake/stop to the A-Pillar may have loosened over time.
B3407142019-01-07. Service bulletin. SERVICE BRAKES, HYDRAULIC. "Carbon Ceramic Brake Noise. INFORMATION ""M"" vehicles are designed for high-performance, spirited driving. To accommodate this type of driving profile, a braking system which exceeds the standards for handling heavy brake forces, extreme temperatures, and excellent stopping power at high speeds is required. ""M"" vehicles can be ordered with the optional ultra high-performance braking system, featuring perforated carbon ceramic brake discs designed for circumstances similar to those encountered on racetracks. The carbon ceramic brakes were designed to improve braking efficiency, and dramatically increase braking performance along with a significant reduction in weight. When developing the carbon ceramic brake system, the main focus was on braking performance for the sporty-minded driver, while accepting the comfort limitations of functional noises at slower speeds and when coming to a stop. Please inform the customer that the carbon ceramic brake system's functional noises (squealing/honking), are a known characteristic for this type of material, and are only a small trade-off for the improved braking performance. These functional noises have no effect on the performance, operational reliability and durability of the brakes. Part replacement will not provide a remedy for the noise; this is a known characteristic of the high-performance brake system. More information on the performance and operation of these brakes can be found in the Owner's Manual under ""M carbon ceramic brake."" WARRANTY INFORMATION Not applicable."

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