# Service bulletin B630521

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: 10194309
- Published by NHTSA: 2021\-05\-24
- Manufacturer's number: B630521
- Manufacturer's date: 2021\-04\-01
- NHTSA component: STRUCTURE:BODY:DOOR; ELECTRICAL SYSTEM

## NHTSA's summary

AMBIENT LIGHT TUBE COLOR DIFFERENCES: The intensity or light throughout the door panel lighting strips is not consistent. Some spots are brighter than others.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10194309-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10194309-9999.pdf)

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

## Components

Body and frame, Electrical system

## Vehicles listed

- 2018 to 2021 BMW X3
- 2019 to 2021 BMW X4

## Recalls for the same vehicles and component

- [26V056000](/recalls/nhtsa/26V056000.md), 2026-01-30: ELECTRICAL SYSTEM:STARTER ASSEMBLY
- [2025499](/recalls/tc/2025499.md), 2025-09-23: Electrical
- [25V636000](/recalls/nhtsa/25V636000.md), 2025-09-23: ELECTRICAL SYSTEM:STARTER ASSEMBLY:RELAY
- [2024609](/recalls/tc/2024609.md), 2024-10-15: Structure
- [24V764000](/recalls/nhtsa/24V764000.md), 2024-10-15: STRUCTURE
- [2024410](/recalls/tc/2024410.md), 2024-07-17: Structure
- [24V534000](/recalls/nhtsa/24V534000.md), 2024-07-17: STRUCTURE
- [20V601000](/recalls/nhtsa/20V601000.md), 2020-09-30: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [20V490000](/recalls/nhtsa/20V490000.md), 2020-08-18: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY; ELECTRICAL SYSTEM:12V/24V/48V BATTERY
- [20V443000](/recalls/nhtsa/20V443000.md), 2020-07-29: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA; ELECTRICAL SYSTEM:SOFTWARE

## Other bulletins for the same vehicles and component

- [B010226DCS](/bulletins/11036453.md), 2026-08-28, Other: STRUCTURE:BODY. BMW Notice of the Court’s Final Approval for Shark\-Fin Antenna Settlement \(X3, X4, X5, X6, X7\)
- [B010226](/bulletins/11036388.md), 2026-08-27, Service bulletin: STRUCTURE:BODY. Rear Roof Antenna Shark Fin Cover Sealing Issue
- [B110426](/bulletins/11035500.md), 2026-08-03, Service bulletin: ENGINE; ELECTRICAL SYSTEM. The manual starting of electronic engine oil level measurement from inside the vehicle, usually afterperforming an engine oil service task, is inoperative or it may lock up at between a 15% to 30% completionrate.
- [B840226](/bulletins/11035408.md), 2026-07-31, Service campaign: ELECTRICAL SYSTEM. Once the Telematics Module \(TCB2\) enters sleep mode, a BMW Data Services trigger for Remote Services\(remote engine start, lock/unlock/climate conditioning\) will not be able to reactivate the TCB2. Due to this issue, Remote Services will not function in the vehicle when parked and locked.
- [B010226](/bulletins/11033030.md), 2026-06-01, Warranty extension: STRUCTURE:BODY. SHARK FIN ROOF ANTENNA SEALING SETTLEMENT Extended Warranty
- [B720225](/bulletins/11017100.md), 2025-04-18, Warranty extension: AIR BAGS; ELECTRICAL SYSTEM. The Supplemental Restraint Systems \(SRS\) Front Passenger’s Seat Occupancy Capacitive Interior Sensor \(CIS\) Mat for defects in materials and/or workmanship that causes a false seat occupancy alert to occur has been extended to 10 years / 120,000 miles as determined from the vehicle's original in\-service / first delivery date.
- [B720325](/bulletins/11017099.md), 2025-04-18, Warranty extension: ELECTRICAL SYSTEM; AIR BAGS. The Supplemental Restraint Systems \(SRS\) Front Passenger’s Seat Occupancy Capacitive Interior Sensor \(CIS\) Mat for defects in materials and/or workmanship that causes a false seat occupancy alert to occur has been extended to 10 years / 120,000 miles as determined from the vehicle's original in\-service / first delivery date.
- [B410722](/bulletins/10253326.md), 2024-05-03, Service bulletin: STRUCTURE. While driving the vehicle on normal roads at10mph and above, a "cracking" sound from the top of the B\-pillar\(s\) is heard.
- [B640422](/bulletins/10250374.md), 2024-03-02, Service bulletin: ELECTRICAL SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. An interference noise \(groaning noise\) can be heard from within the heating and air\-conditioning unit in thecenter of the instrument panel. The groaning noise always occurs when either a ventilation flap, air stratification flap or the recirculated airflap moves to a different position. Due to the complex design of the heating and air\-conditioning unit, the kinematics causing it \(top or bottom,left or right\) may not be able to be precisely located. Depending on the vehicle model, the number of servomotors \(and the associated kinematics unit\) varies.Various models use either 2 or 3 servomotors.
- [B510819](/bulletins/10249437.md), 2024-02-01, Service bulletin: VISIBILITY:POWER WINDOW DEVICES AND CONTROLS; ELECTRICAL SYSTEM. The basic conditions for initializing the power windows are not met.

JSON: [/v1/bulletins/10194309](/v1/bulletins/10194309)

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