# Service bulletins for the 2026 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.

3 bulletins from NHTSA, as of 2026-10-19.

- [B110126](/bulletins/11029098.md), 2026-03-02, Service campaign: ENGINE. Delivery Stop \- Bearing Shell
- [B340925](/bulletins/11026950.md), 2026-01-05, Service bulletin: SERVICE BRAKES. There may be an internal leakage in the brake fluid expansion tank \(aka brake fluid reservoir\). In the rarecase of a leak, the filling level sensor might malfunction over a relatively long period of time.
- [B840625](/bulletins/11024211.md), 2025-10-09, Service bulletin: ELECTRICAL SYSTEM. In some situations, an emergency call may be triggered in the vehicle without either the customer pressing the SOS Call button, or an airbag deployment event. In some cases, the customer may not even be inside the vehicle.

JSON: [/v1/vehicles/2026_bmw_m4/bulletins](/v1/vehicles/2026_bmw_m4/bulletins)

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