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BMW brake pad warning light
A pad wear sensor has been reached. Plan new pads (and usually rotors) soon.
Last updated
At a glance
| Can I keep driving? | Yes, but book it soon |
|---|---|
| Warning color | Yellow |
| Wording you may see | Brake pads! Replace Brake pads worn (front or rear) Service due: brake pads (CBS) |
| Usual causes | Normal pad wear Premature rear pad wear (BMW bulletin) Sensor or CBS mismatch |
What it means
Each axle has an electrical wear sensor clipped into one brake pad. When the pad wears down to it, the sensor is ground through and the car shows "Brake pads! Replace. The brake pads are worn." (BMW E90 wording). Condition Based Service (CBS) also estimates the remaining pad life from the sensor and your driving, which is why the service menu shows a date or distance for front and rear pads.
Can I keep driving?
Yes, but book it soon. The warning comes on with some pad material left, so braking isn't affected right away. Waiting too long risks metal-on-metal contact and damaged rotors. A red brake warning or "Brake fluid! Stop carefully" is different and more serious.
This is general guidance. Your owner's manual has the exact instruction for your car, and any red warning means stop as soon as it is safe.
Usual causes
| Cause | Cars most affected | What you notice | BMW bulletins | Repair prices (national average) |
|---|---|---|---|---|
| Normal pad wear | All | Replace the pads and the wear sensor on that axle; most shops also replace the rotors on BMWs. | — | Brake pads and rotors replacement (per axle) Indie owners paid $769–$828 Dealer owners paid $651–$978 |
| Premature rear pad wear (BMW bulletin) | G20 3 Series and G29 Z4 with standard brakes, built November 2018 to December 2019 | Rear pads reported worn under 15,500 miles; BMW traced it to rear calipers dragging slightly and fitted improved calipers. | SI B34 03 20 (PDF) | — |
| Sensor or CBS mismatch | Various | The CBS remaining-life figure can disagree with actual pad thickness, especially after pads are changed without resetting CBS or replacing the sensor. | — | — |
Bulletins are BMW service information filed with NHTSA; open one for the exact models, build dates and repair. A bulletin isn't a recall and doesn't mean your car has the problem. Estimates are national averages built from BMW warranty labor time, regional shop rates and parts prices; open a repair for your ZIP. "Owners paid" is the middle half of sourced prices, shown where we have at least 3.
What to do
- Ask for pad thickness and rotor thickness measurements, not just "brakes due".
- Make sure the shop replaces the wear sensor and resets the CBS brake service.
- If the car is over three years old, ask a BMW dealer for its BMW Value Service brake price; owners report dealer prices from about $475 to $970 per axle under it.
Other BMW bulletins that mention it
- SI B34 03 15 Uneven Brake Pad Wear with Regenerative Braking I12, I15 · Feb 2016
- SI B34 05 16 CBS brake pad calculation and correction E60, E82, E90, E92, E93 and others · Oct 2016
- SI B34 02 23 Brake squeak occurs with cold brakes and driving slowly G01, G02, F97, F98 · May 2023
- SI B34 01 17 Vibration while braking E60, F06, F07, F10, F12 and others · May 2017
- SI B34 02 13 Incorrect Remaining Service Life from CBS Data for Brake Pads E60, E82, F01, F02, F06 and others · May 2014
- SI B34 03 13 Incorrect Remaining Service Life from CBS Data for Brake pads E82, E88, E90, E92, E93 and others · May 2014
- SI B34 02 08 Erroneous Brake Pad Replacement Message E46, E90, E91, E92, E93 · May 2013
- SI B34 02 08 Erroneous Brake Pad Replacement Message E46, E90, E91, E92, E93 · Feb 2013
9 of the BMW bulletins we hold mention this warning in their text; these are the closest matches.
Related warnings
DSC, ABS or brake system warning Service due light All warning lights
Sources
- BMW E90 Driver Information Systems (BMW technical training manual): Check Control message list
- BMW USA: digital owner's manual for your VIN
- NHTSA: BMW technical service bulletins and recalls by VIN
Message wording in quotes is BMW's own, from the Check Control list in BMW's E90 training manual or from the bulletins linked above; newer cars word some messages differently. The explanations are ours.