Car Recall Tracker

Home › BMW › Z4 › 21V598000

BMW and Toyota Supra lose power brake assist

NHTSA campaign 21V598000 · Reported 2021-08-02 · BMW of North America, LLC

high How serious is it? About this label

This is a real crash risk because stopping takes much more effort, but the brakes still function and the notice does not tell owners to stop driving.

What's wrong, in plain English

In certain BMW cars and the Toyota Supra, a software error in the engine computer can cut off the power assist for your brakes when the engine starts. The brakes still work mechanically, but without the boost you're used to, so the pedal will feel much harder to push and you'll need to press far more firmly to slow down. BMW dealers will reprogram the engine software at no cost to you.

What you should do

1. Enter your VIN at nhtsa.gov/recalls to see if your vehicle is included. 2. Call your BMW or Toyota dealer, or BMW customer service at 1-800-525-7417, to book the software update. 3. Have the update done — the repair is free.

Affected vehicles (9)

Who to contact

BMW — official BMW recall lookup

Customer service: 1-800-525-7417

Toyota — official Toyota recall lookup

Customer service: 1-800-331-4331

Any franchised dealer for the brand can do the repair. Phone numbers are taken from manufacturer sites and recent NHTSA notices; if one has changed, the number in your own recall letter is the one to use.

The bigger picture

Official notice

Component
ENGINE
Summary
BMW of North America, LLC (BMW) is recalling certain 2020 M340i, M340i xDrive, 540i, 540i xDrive, X3 M40i, 2020-2021 X4 M40i, 745Le xDrive, 2019-2021 Z4 M40i, and 2020-2021 Toyota Supra vehicles. During engine start, the engine management software may cause loss of braking assist. Full mechanical braking (without assist) remains available.
Safety risk
Loss of braking assist can increase the risk of a crash.
Remedy
Dealers will update the engine management software, free of charge. Owner notification letters were mailed on September 17, 2021. Owners may contact BMW customer service at 1-800-525-7417.

Verify your specific vehicle by VIN at nhtsa.gov. Recall repairs are free of charge by law.