BMW bulletin B660523
What it saysVarious functions of the camera-based driver assistance systems (ADCAM system) can lead to customer complaints. NHTSA’s full summary ↓
BMW filed this with NHTSA as a service bulletin dated Oct 19, 2023, received May 1, 2023, about the lane departure — 2 documents under this number. It names 40 model years (2016–2024). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationVarious functions of the camera-based driver assistance systems (ADCAM system) can lead to customer complaints.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| B660523 | Service bulletin | Oct 19, 2023 | 10244242 | PDF, 130 KB |
| B660523 | Service bulletin | Mar 1, 2023 | 10235204 | not found |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
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Model years it names
Source: as the manufacturer filed themAlso filed against model years this site has no page for: 2021 BMW B7 Alpina; 2021 BMW IX.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 38 model years this bulletin names have filed 1,885 complaints with NHTSA since 2015. 547 of them name Electrical System, Forward Collision Avoidance, Vehicle Speed Control — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
On the 2019 BMW X5, the 19 owners who gave an odometer reading for Electrical System reported it at a median of 55,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
The contact owns a 2019 BMW X7. The contact stated that while attempting to start the vehicle, the message that the starter motor was overheating was displayed and the vehicle failed to start. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the starter motor. The vehicle was repaired.
2019 BMW X7 · Electrical System · filed with NHTSA May 12, 2025 · ODI 11660474
The contact owns a 2019 BMW X1. The contact stated that the emergency call error light illuminated the instrument panel. In December of 2024, the contact received notification regarding an extended warranty coverage for the battery to be replaced. The contact was unable to immediately take the vehicle to the dealer due to other reasons.
2019 BMW X1 · Electrical System · filed with NHTSA Mar 12, 2025 · ODI 11647914
The air condition is inadequate for temperatures above 80°. Due to the inadequacy of the coldness and the speed at which the fan blows, all passengers in a fully loaded vehicle complain of excessive heat temperatures Safety is an issue if left in the vehicle for a long period of time without proper temperatures being reached for all in…
2024 BMW X7 · Electrical System · filed with NHTSA Aug 22, 2024 · ODI 11610316
In depth: 2019 BMW X5 electrical problems →
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the lane departure
Source: same model, same component group3 other manufacturer communications filed against these BMW models under the same component group (lane departure), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| B661025 | Service bulletin | Jul 25, 2025 | The lane steering assistance feature will not activate; or deactivation occurs prematurely while activated. The FRSF front radar may also ha… |
| 0065940400 | Service campaign | Dec 13, 2024 | Customer may complain that the hands-free option with SA 5AX – “Highway Assistant” can no longer beactivated. |
| B662719 | Service bulletin | Sep 1, 2022 | LANE CHANGE WARNING: LIGHT ON EXTERIOR MIRROR NO LONGER WORKS. The Lane Change Warning (LCW) light on either one or on both of the exterior… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for BMW, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is BMW B660523 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the B660523 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every BMW warranty extension on file lists the ones BMW has filed.
Which vehicles does B660523 cover?
The manufacturer filed it against 40 model years: 2023 BMW 7 Series, 2024 BMW X1, 2023 BMW X1, 2022 BMW X1, 2021 BMW X1, 2020 BMW X1 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.