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What 21 owners told NHTSA about the 2018 Cadillac ATS V-series

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (21)Crash / fire / injury (1)Transmission & drivetrain (6)Electrical system (3)Steering (3)Airbags (2)Fuel system (2)Lights (2)Body & structure (1)Engine (1)Equipment (1)Suspension (1)

3 of 21 complaints match · Electrical system · clear filters

Dec 22, 2025Electrical system

The contact owns a 2018 Cadillac ATS. The contact stated that the check engine warning light was illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed, and the mechanic determined that the F-module, Part Number: 86815664, used to control the engine Auto START/STOP, needed to be replaced. The dealer was contacted for the part and informed the contact that the part was not available. The contact had contacted approximately 6 dealers, who confirmed that the part was not available. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 33,527.

NHTSA ODI 11706515

Jun 26, 2024Electrical system

The car was parked outside at around 85 degrees. After entering the vehicle and driving with the AC on for a few minutes the CUE screen started to crack on the inside like a spider web. This has already been reported in 11576315 and 11325962. But I can't find any manufacturer communication on these. On the Internet I found that there is a class action lawsuit but only up to the year 2017 and it has already been settled privately. Since the vehicle is out of warranty there is no effort from GM to pay for the replacement. Since the CUE screen is essential for the vehicle operations, i.e. settings, navigation etc. it's a safety issue. On the Internet there are crowds of people complaining about the same issue. GM should react and offer replacement. Especially a replacement where the issue is fixed, otherwise the replacement will crack again after some years. Thanks and BR

NHTSA ODI 11596850

May 26, 2020Electrical systemEquipment

THE SCREEN IS STARTING TO SPIDER CRACK UNDERNEATH THE GLASS. VEHICLE WAS STATIONARY IN MY DRIVEWAY. *TR

NHTSA ODI 11325962

Working with the data? Download all 21 complaints as CSV · fetched from NHTSA July 27, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2018 Cadillac ATS V-series verdict →