# Service bulletin B340223

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.

- Type: Service bulletin
- NHTSA id: 10238072
- Published by NHTSA: 2023\-06\-26
- Manufacturer's number: B340223
- Manufacturer's date: 2023\-05\-01
- NHTSA component: SERVICE BRAKES, HYDRAULIC

## NHTSA's summary

Brake squeak may occur with cold brakes and driving slowly or reversing

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10238072-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10238072-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes

## Vehicles listed

- 2018 to 2023 BMW X3
- 2019 to 2023 BMW X4

## Recalls for the same vehicles and component

- [2021479](/recalls/tc/2021479.md), 2021-08-03: Brakes
- [2018366](/recalls/tc/2018366.md), 2018-07-06: Brakes
- [18V453000](/recalls/nhtsa/18V453000.md), 2018-07-06: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER

## Other bulletins for the same vehicles and component

- [B661719](/bulletins/11017504.md), 2025-05-02, 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.
- [B341019](/bulletins/10203336.md), 2021-11-08, Service bulletin: SERVICE BRAKES, HYDRAULIC. Inform the customer during a consultation that the M Compound \(standard equipment\) and M Carbon Ceramic \(optional\) brakes are high\-performance brake systems which are designed for sporty, dynamic driving styles. As a side effect of the highest possible brake performance, customers are likely to hear noises due to the extremely resilient materials. In the same conversation, inform the customer that his/her braking performance can help ensure that the noises do not occur or disappear quickly.
- [B341019](/bulletins/10201141.md), 2021-09-07, Service bulletin: SERVICE BRAKES, HYDRAULIC. Inform the customer during a consultation that the M Compound \(standard equipment\) and M Carbon Ceramic \(optional\) brakes are high\-performance brake systems which are designed for sporty, dynamic driving styles. As a side effect of the highest possible brake performance, customers are likely to hear noises due to the extremely resilient materials In the same conversation, inform the customer that his/her braking performance can help ensure that the noises do not occur or disappear quickly.
- [B360121](/bulletins/10194298.md), 2021-05-24, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; SERVICE BRAKES, AIR:DISC. Diagnosis of Compound Brake System Complaints in M Vehicles: 1. Visible cracks are caused by high thermal stresses during rapid heating and cooling of the brake discs. Braking from high speed with cold brake components \(less than 212 degrees F\) increases the likelihood of cracks to form.
- [B340414](/bulletins/10194296.md), 2021-05-24, Service bulletin: SERVICE BRAKES, AIR:DISC; STEERING: STEERING WHEEL/HANDLE BAR. Diagnosis of Compound Brake System Complaints in M Vehicles: 1. Visible cracks are caused by high thermal stresses during rapid heating and cooling of the brake discs. Braking from high speed with cold brake components \(less than 212 degrees F\) increases the likelihood of cracks to form.
- [B340517](/bulletins/10178996.md), 2020-08-31, Service bulletin: SERVICE BRAKES, HYDRAULIC; WHEELS. TICKING NOISE WHILE CORNERING WITHOUT THE BRAKES APPLIED: Ticking noise coming from front wheel while cornering without brakes applied, noticeable at low speeds. The vehicle must be moving.
- [B170320](/bulletins/10176366.md), 2020-06-15, Service bulletin: FUEL SYSTEM, GASOLINE; ELECTRICAL SYSTEM; LANE DEPARTURE; SERVICE BRAKES, HYDRAULIC; ENGINE AND ENGINE COOLING. COOLANT LINE QUICK DISCONNECTS LEAK IN LOW TEMPERATURES AT OR BELOW \-15Ë?C \(5Ë?F\): The coolant reservoir in the high or low temperature cooling system is low There may be a coolant leak under the vehicle There may be a check control message \(ID166\) to top up coolant The low temperature cooling system have a low level warning indicator. One or more faults may be stored related to the low temp cooling system: DME \- 20A201 \- charge air cooling system: Coolant pump protective function due to dry running active DME \- 20A209 \- charge air cooling system: Coolant pump protective function due to dry running active IHKA \- 80120A \- Compressor: Switch off due to excess pressure in the refrigerant circuit The outside temperature at the time of the complaint is at or below \-15Ë? C \(5Ë? F\) The O\-rings that seal the quick disconnect coolant lines will not seal properly when outside temperatures are at or below \-15Ë? C \(5Ë? F\).
- [B513016](/bulletins/10174015.md), 2020-04-20, Service bulletin: AIR BAGS; PARKING BRAKE. TAILGATE UNINTENTIONALLY OPENS: This Service Information Bulletin \(Revision 4\) replaces SI B51 30 16 dated March 2018. Trunk/tailgate may open when vehicle is locked Trunk/tailgate may open while the vehicle is in motion usually after stopping such as a traffic light etc. Vehicle key trunk/tailgate button may be accidentally pressed thus opening the tailgate.
- [B340517](/bulletins/10174009.md), 2020-04-20, Service bulletin: BACK OVER PREVENTION; SERVICE BRAKES, HYDRAULIC; WHEELS; POWER TRAIN. TICKING NOISE WHILE CORNERING WITHOUT THE BRAKES APPLIED: This Service Information Bulletin \(Revision 3\) replaces SI B34 05 17 dated September 2017. Ticking noise coming from front wheel while cornering without brakes applied noticeable at low speeds. The vehicle must be moving. See attached video V34 01 20 Note: For a similar noise heard when parking with the brakes applied refer to SIB 31 01 12. Microscopic movement of the contact interface between the inner brake disc and the wheel bearing flange on vehicles equipped with lightweight brake discs.
- [B621019](/bulletins/10170589.md), 2020-01-21, Service bulletin: SERVICE BRAKES. INCORRECT CONDITION BASED SERVICE DATA FOR BRAKE FLUID SERVICE. "Brake fluid service due since 12/2001" is displayed in the instrument cluster although the vehicle is only a maximum of 1 year old. Software error in the KOMBI \(Instrument Cluster\).

JSON: [/v1/bulletins/10238072](/v1/bulletins/10238072)

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