TSB ATS180402 — Honda Service bulletin

ATS180402 is a service bulletin on file with NHTSA for the Honda Accord, 2003–2007 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.

What the bulletin says. Tech line summary article - When adding keys or running the System Check with the Immobilizer Setup Tool in the i-HDS, are you seeing this message? "Immobilizer system is not normal". We?re aware of this issue and have it under investigation.

NHTSA's own summary of the document, quoted from the public manufacturer-communications file.

1Document filed
1Vehicle named
5Model years

Vehicles and model years ATS180402 names

VehicleModel years
Honda Accord 2003, 2004, 2005, 2006, 2007

Every document filed under ATS180402

Document IDFiledType
ATS180402 April 17, 2018 Service bulletin

What ATS180402 covers

Engine — the component vocabulary NHTSA files this communication under.

← All Honda Accord TSB years TSB lookup by model

Questions buyers ask

What is TSB ATS180402?

ATS180402 is a service bulletin filed with NHTSA by Honda, covering the Honda Accord across the 2003–2007 model years. NHTSA's summary reads: Tech line summary article - When adding keys or running the System Check with the Immobilizer Setup Tool in the i-HDS, are you seeing this message? "Immobilizer system is not normal". We?re aware of this issue and have it under investigation.

Which vehicles does ATS180402 cover?

NHTSA's file names Honda Accord (2003–2007). 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 ATS180402 a recall, and is the repair free?

No. ATS180402 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 ATS180402?

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 ATS180402, its date, and NHTSA's own summary from the public file.

Data updated 2026-08-20 from NHTSA's public records

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 ATS180402. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.