TSB B23-013 — Acura Service bulletin
B23-013 is a service bulletin on file with NHTSA for the Acura MDX, 2019–2020 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. Service Bulletin - A driver can notice loss of auto function, or no function, of the sunroof glass/sunshade due to Motor-Control Unit error code in the clock frequency check falsely detecting a failure.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years B23-013 names
Every document filed under B23-013
| Document ID | Filed | Type |
|---|---|---|
| B23-013 | May 23, 2023 | Service bulletin |
What B23-013 covers
Body & structure, Visibility & wipers — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB B23-013?
B23-013 is a service bulletin filed with NHTSA by Acura, covering the Acura MDX across the 2019–2020 model years. NHTSA's summary reads: Service Bulletin - A driver can notice loss of auto function, or no function, of the sunroof glass/sunshade due to Motor-Control Unit error code in the clock frequency check falsely detecting a failure.
Which vehicles does B23-013 cover?
NHTSA's file names Acura MDX (2019–2020). 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 B23-013 a recall, and is the repair free?
No. B23-013 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 B23-013?
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 B23-013, 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 B23-013. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.