TSB B520126 — BMW Service bulletin
B520126 is a service bulletin on file with NHTSA for the BMW X5, 2024–2026 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. The customer brings vehicle in with one or both of the second row 60/40 split seats in the folded position.The seat does not respond to any requests from the second seat row seat switch button(s).
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years B520126 names
Every document filed under B520126
| Document ID | Filed | Type |
|---|---|---|
| B520126 | March 9, 2026 | Service bulletin |
What B520126 covers
Seats & interior — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB B520126?
B520126 is a service bulletin filed with NHTSA by BMW, covering the BMW X5 across the 2024–2026 model years. NHTSA's summary reads: The customer brings vehicle in with one or both of the second row 60/40 split seats in the folded position.The seat does not respond to any requests from the second seat row seat switch button(s).
Which vehicles does B520126 cover?
NHTSA's file names BMW X5 (2024–2026). 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 B520126 a recall, and is the repair free?
No. B520126 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 B520126?
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 B520126, 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 B520126. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.