TSB B521823 — BMW Service bulletin
B521823 is a service bulletin on file with NHTSA for the BMW X3, 2004–2023 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. A noise can be heard from underneath the seat while the seat is being moved either forwards or backwards. This can occur to the driver’s and/or the passenger’s front seat.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years B521823 names
| Vehicle | Model years |
|---|---|
| BMW X3 | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2023 |
Every document filed under B521823
| Document ID | Filed | Type |
|---|---|---|
| B521823 | December 15, 2023 | Service bulletin |
What B521823 covers
Seats & interior — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB B521823?
B521823 is a service bulletin filed with NHTSA by BMW, covering the BMW X3 across the 2004–2023 model years. NHTSA's summary reads: A noise can be heard from underneath the seat while the seat is being moved either forwards or backwards. This can occur to the driver’s and/or the passenger’s front seat.
Which vehicles does B521823 cover?
NHTSA's file names BMW X3 (2004–2021, 2023). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB B521823 a recall, and is the repair free?
No. B521823 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of B521823?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under B521823, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under B521823. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.