# Service bulletin B521723

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: 10247576
- Published by NHTSA: 2024\-01\-03
- Manufacturer's number: B521723
- Manufacturer's date: 2023\-12\-11
- NHTSA component: SEATS

## NHTSA's summary

Customer states one of the front seats is inoperative. The seat heater and power supply are inoperative .During the vehicle test, the seat module does not respond. The power supply fuse for the seat module is found to have blown.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10247576-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10247576-9999.pdf)

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

## Components

Seats

## Vehicles listed

- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- BMW 3 SERIES
- 2023 BMW 4 SERIES
- BMW 8 SERIES
- 2013 to 2024 BMW X1

## Recalls for the same vehicles and component

- [2023214](/recalls/tc/2023214.md), 2023-04-12: Seats And Restraints
- [2021448](/recalls/tc/2021448.md), 2021-07-21: Seats And Restraints
- [2019276](/recalls/tc/2019276.md), 2019-06-07: Seats And Restraints
- [2016107](/recalls/tc/2016107.md), 2016-03-03: Seats And Restraints

## Other bulletins for the same vehicles and component

- [B521225](/bulletins/11023249.md), 2025-09-22, Service bulletin: SEATS. A clicking noise can be heard from one or both front seat backrests. This noise is heard when leaning against the backrest of the seat or while the vehicle is cornering.
- [B064924](/bulletins/11005475.md), 2024-08-02, Other: SEATS. Seat Foam Pad Return
- [B520224](/bulletins/10252015.md), 2024-04-01, Service bulletin: SEAT BELTS; SEATS; AIR BAGS. The seat initialization and memory has been lost; Or Repeat failure of seat initialization after completing the test module via ISTA. One or both of the following check control messages \(CCM\) may be present: CCM 108 “Driver restraint system” CCM 109 “Passenger restraint system”
- [B521723](/bulletins/10249023.md), 2024-02-01, Service bulletin: ELECTRICAL SYSTEM; SEATS. Customer states one of the front seats is inoperative. The seat heater and power supply are inoperative. During the vehicle test, the seat module does not respond. The power supply fuse for the seat module isfound to have blown.
- [B520723](/bulletins/10239607.md), 2023-07-24, Service bulletin: SEATS. The front seat heating does not heat up after vehicle departure with the climate control in the automatic mode.
- [B520723](/bulletins/10235189.md), 2023-05-01, Service bulletin: SEATS. The front seat heating does not heat up after vehicle departure with the climate control in the automatic mode.
- [B522219](/bulletins/10170580.md), 2020-01-21, Service bulletin: SEATS. NOISE DURING FORWARD / BACK SEAT ADJUSTMENT OVER THE ENTIRE LENGTH OF TRAVEL: A loud screeching noise can be heard from the front driver's or passenger's seat during forward/back seat adjustment.
- [B522219](/bulletins/10166378.md), 2019-10-21, Service bulletin: EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; SEATS. NOISE DURING FORWARD/BACK SEAT ADJUSTMENT OVER THE ENTIRE LENGTH OF TRAVEL: A loud screeching noise can be heard from the front driver's or passenger's seat during forward/back seat adjustment.
- [B520316](/bulletins/10151368.md), 2018-12-10, Service bulletin: SEATS. "Driver's Seat will not Return to Saved Position. The driver's seat adjustment does not return to the saved position after changing the driver profiles \(Personal Profile\). NOTE: the setting for both remote keys must be selected in vehicle setting to ""Move to the last seat position"". From the CID, ""Settings""\- ""Doors/ignition key""\- ""Last seat position automat. "". Coding error in seat module"
- [B520516](/bulletins/10147026.md), 2018-11-05, Service bulletin: SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER. HEATED SEAT TEMPERATURES INCORRECT. Seat heater output is incorrect \- too high or too low. Target temperatures: Level 1 = 95F after 20 min Level 2 = 99.5F after 20 min Level 3 = 104F after 20 min Insufficient encoding of seat heating control unit.

JSON: [/v1/bulletins/10247576](/v1/bulletins/10247576)

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