TSB: VOLVO VAH, VHD, VNL, VNM, VNX (1990–2019)

Bulletin K24400052 — February 20, 2018

Bulletin Details

Bulletin IDK24400052
ManufacturerVOLVO
ModelsVAH, VHD, VNL, VNM, VNX
Model Years1990–2019
Date IssuedFebruary 20, 2018
Date Added to NHTSAMarch 13, 2018
ComponentSTEERING:GEAR BOX (OTHER THAN RACK AND PINION)
Vehicles Affected214 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

Volvo Chassis - Equipped With An Automated Manual Transmission (AMT, I-Shift ) - Error Code 126 Displayed In Premium Tech Tool (PTT ) While Performing The Calibration Procedure After The Shift Control Housing Has Been Removed And Installed,

Affected Vehicles

MakeModelYearComponent
VOLVO VHD 2019 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2019 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2019 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2019 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2019 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2019 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VAH 2018 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VAH 2018 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2018 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2018 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2018 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2018 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2018 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2018 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNX 2018 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNX 2018 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VAH 2017 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VAH 2017 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2017 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2017 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2017 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2017 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2017 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2017 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNX 2017 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNX 2017 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VAH 2016 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VAH 2016 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2016 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2016 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2016 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2016 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2016 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2016 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNX 2016 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNX 2016 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VAH 2015 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VAH 2015 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2015 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2015 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2015 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2015 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2015 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2015 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNX 2015 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNX 2015 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VAH 2014 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VAH 2014 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2014 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2014 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2014 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2014 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2014 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2014 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNX 2014 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNX 2014 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VAH 2013 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VAH 2013 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2013 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2013 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2013 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2013 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2013 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2013 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNX 2013 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNX 2013 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VAH 2012 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VAH 2012 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2012 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2012 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2012 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2012 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2012 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2012 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VAH 2011 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VAH 2011 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2011 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2011 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2011 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2011 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2011 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2011 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VAH 2010 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VAH 2010 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2010 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2010 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2010 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2010 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2010 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2010 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VAH 2009 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VAH 2009 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2009 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2009 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2009 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2009 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2009 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2009 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VAH 2008 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VAH 2008 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2008 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2008 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2008 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2008 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2008 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2008 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VAH 2007 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VAH 2007 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2007 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2007 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2007 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2007 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2007 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2007 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2006 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2006 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2006 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2006 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2006 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2006 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2005 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2005 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2005 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2005 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2005 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2005 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2004 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2004 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2004 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2004 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2004 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2004 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2003 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2003 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2003 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2003 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2003 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2003 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2002 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2002 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2002 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2002 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2002 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2002 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2001 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2001 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2001 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2001 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2001 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2001 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 2000 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 2000 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 2000 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 2000 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 2000 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 2000 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 1999 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 1999 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 1999 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 1999 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 1999 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 1999 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 1998 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 1998 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 1998 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 1998 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 1998 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 1998 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 1997 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 1997 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 1997 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 1997 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 1997 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 1997 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 1996 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 1996 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 1996 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 1996 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 1996 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 1996 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 1995 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 1995 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 1995 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 1995 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 1995 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 1995 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 1994 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 1994 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 1994 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 1994 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 1993 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 1993 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 1993 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 1993 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 1992 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 1992 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 1992 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 1992 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 1991 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 1991 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 1991 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 1991 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 1990 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 1990 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 1990 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 1990 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VAH 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VAH 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VHD 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VHD 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNL 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNL 102000 POWER TRAIN:MANUAL TRANSMISSION
VOLVO VNM 013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
VOLVO VNM 102000 POWER TRAIN:MANUAL TRANSMISSION

Related VOLVO Recalls

CampaignModelYearComponentSummary
VNL (4) 2026 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Volvo Trucks North America (Volvo Trucks) is recalling certain 2026-2027 VNR ...
VNL (4) 2027 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Volvo Trucks North America (Volvo Trucks) is recalling certain 2026-2027 VNR ...
VNR (4) 2027 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Volvo Trucks North America (Volvo Trucks) is recalling certain 2026-2027 VNR ...
VNL (4) 2025 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Volvo Trucks North America (Volvo Trucks) is recalling certain 2026-2027 VNR ...
VNR (4) 2026 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Volvo Trucks North America (Volvo Trucks) is recalling certain 2026-2027 VNR ...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized VOLVO dealer. Bring this bulletin ID (K24400052) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.