The 2015 ATS is a competent rear-drive sport sedan undermined by catastrophic 2.0T engine failures and transmission cooling issues. The 2.5L is bulletproof but boring; the 3.6L is more reliable than the turbo but drinks premium fuel.
Symptoms: Excessive oil consumption (quart per 1,000 mi or worse), Metallic knocking from crankcase, Check engine light with misfire codes, Loss of compression, Sudden seizure or rod knock
Fix: Total engine failure requiring short block or complete engine replacement. Carbon buildup starves rings, leading to blow-by and bearing damage. Warranty extensions existed but many are expired now. 16-24 labor hours for removal, replacement, break-in.
Estimated cost: $7,000-12,000
Transmission Oil Cooler Line Leaks and Cooler Failure
Common · high severity
Typical onset: 50,000-90,000 mi
Symptoms: Transmission fluid dripping from center of vehicle, Burnt transmission fluid smell, Slipping or harsh shifts, Transmission overheating warnings
Fix: The 8-speed auto's cooler lines corrode where they connect to the radiator-mounted cooler, or the cooler itself fails internally. Requires cooler replacement, lines, and full fluid flush. If driven low on fluid, internal transmission damage follows. 4-6 labor hours.
Estimated cost: $800-1,800
CUE Infotainment System Freezing and Touchscreen Failure
Common · low severity
Symptoms: Touchscreen unresponsive or only partially responsive, System reboots randomly, Climate controls inaccessible, Bluetooth and nav failures
Fix: Early CUE systems have notoriously unreliable touchscreens and processor modules. Fixes range from software reflashes (1 hour) to complete CUE module replacement (3-4 hours). GM issued TSBs but no permanent solution for early units.
Estimated cost: $150-2,500
Transmission Mount Failure (Rear)
Occasional · medium severity
Typical onset: 70,000-110,000 mi
Symptoms: Clunking when shifting from Park to Drive, Vibration at idle in gear, Excessive drivetrain movement over bumps, Visible torn rubber on mount inspection
Fix: The rear transmission mount tears due to the torque from the turbo or V6. Requires lift access and subframe support. OEM mount recommended over aftermarket. 2-3 labor hours.
Estimated cost: $350-600
Sunroof Drain Tube Clogs and Water Intrusion
Occasional · medium severity
Symptoms: Water pooling in footwells (front or rear), Wet headliner around sunroof, Musty smell, Electrical gremlins (modules getting wet)
Fix: Drain tubes clog with debris, causing water to back up into cabin. Requires tube cleaning/snake, sometimes tube replacement if cracked. If water damaged modules (common: BCM, seat modules), repair costs skyrocket. Preventive cleaning: 1 hour; full repair with module replacement: 6-10 hours.
Estimated cost: $150-2,000
Timing Chain Stretch (2.0T)
Occasional · high severity
Typical onset: 80,000-130,000 mi
Symptoms: Rattle on cold start for 2-3 seconds, Check engine light with cam/crank correlation codes, Rough idle, Loss of power
Fix: The 2.0T's timing chain stretches if oil changes are neglected or wrong oil used. Requires front engine disassembly, timing set replacement, and often VVT solenoids. If chain jumps timing, valve damage occurs. 10-14 labor hours.
Estimated cost: $2,200-4,000
Electronic Power Steering Failures
Rare · high severity
Typical onset: 60,000-100,000 mi
Symptoms: Sudden complete loss of power steering assist, Steering becomes extremely heavy, Warning message: 'Power Steering Assist Fault'
Fix: Electric power steering motor or control module fails, leaving manual steering only. Dangerous in traffic. Module replacement requires programming; motor requires column removal. 3-5 labor hours depending on component.
Estimated cost: $1,200-2,200
Owner tips
If buying a 2.0T, have pre-purchase inspection include oil consumption test and borescope inspection of cylinders—if it's using oil, walk away
Check transmission cooler lines at every oil change; catch leaks before transmission starves
Use only dexos1 Gen 2 full synthetic oil in the 2.0T, change every 5,000 mi maximum regardless of oil life monitor
Clear sunroof drain tubes annually with compressed air to prevent water damage
The 2.5L naturally aspirated engine is dead reliable but underpowered—best choice for longevity if you can live with 200 hp
Skip the 2.0T entirely due to engine failure epidemic; a 2.5L or 3.6L V6 example under 60k miles with full records might be worth $12-15k, but factor $2-3k repair buffer for transmission and CUE issues.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
Fitment notes: AGM battery required; located in trunk; 3.6L V6 requires higher CCA than 2.0L turbo models
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Every control module on the 2013-2019 Cadillac ATS — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
⚠️ Requires sensor calibration; may be integrated with RVCM on later models
Rear Vision Camera Module (RVCM)0.5 hr R&Rrelearn only +0.2 hr▸ programming details
📍 Rear trunk lid or integrated into camera assembly
🔧 GM MDI or scan tool
⚠️ Backup camera standard 2013+; calibration usually automatic
Seat Control Module (SCM)0.5 hr R&Rrelearn only +0.2 hr▸ programming details
📍 Under driver and passenger seats
🔧 GM MDI or scan tool
⚠️ Memory seats have individual modules per seat; heated/cooled seat control
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE · 26V329000
2026-05-21
General Motors, LLC (GM) is recalling certain 2015 Cadillac Escalade, Escalade ESV, XTS, 2015-2016 Cadillac ATS, CTS, and SRX vehicles. The front-driver air bag inflator may rupture during deployment.
Consequence: An inflator rupture may result in sharp metal fragments striking the driver or other occupants, resulting in serious injury or death.
Remedy: Dealers will replace the front-driver air bag module, free of charge. Interim letters notifying owners of the safety risk were mailed June 19, 2026. Additional letters will be mailed once the remedy is available. Owners may contact Cadillac customer service at 1-800-333-4223. The manufacturer's number for this recall is N262555870. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on May 21, 2026.
VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM · 15V558000
2015-09-03
General Motors LLC (GM) is recalling certain model year 2013-2016 Cadillac ATS sedan vehicles manufactured April 23, 2012, to September 2, 2015. In the affected vehicles, the coil antenna module that powers the rear defogger system may generate excessive heat due to excessive cycling or continuous operation.
Consequence: If the coil antenna generates excessive heat, there is an increased risk of a fire.
Remedy: GM will notify owners, and dealers will update the Electronic Climate Control module to remove the automatic rear defogger "on" function, free of charge. The recall began on October 16, 2015. Owners may contact Cadillac customer service at 1-800-458-8006. GM's number for this recall is 15299.
VISIBILITY:SUN/MOON ROOF ASSEMBLY · 15V463000
2015-07-24
General Motors LLC (GM) is recalling certain model year 2013-2016 Cadillac ATS vehicles manufactured April 25, 2012, to June 25, 2015. The affected vehicles may experience the roof panel closing automatically when the non-recessed switches are pressed and the roof panel is open. These vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 118, "Power-Operated Window, Partition, and Roof Panel Systems."
Consequence: Because the switch is not recessed, the roof panel switch may inadvertently be pressed resulting in unintended auto-closure of the roof panel, increasing the risk of personal injury.
Remedy: GM will notify owners and dealers will replace the roof console accessory switch trim plate, free of charge. The recall began on August 19, 2015. Owners may contact Cadillac customer service at 1-800-458-8006. GM's number for this recall is 15568. Note this recall supersedes 15V-106.
SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES · 15V358000
2015-06-09
General Motors LLC (GM) is recalling certain model year 2015 Cadillac ATS and CTS vehicles. The affected vehicles have a bracket between the brake pedal assembly and the rod that actuates the brakes that may fracture during normal brake pedal operation.
Consequence: If the bracket fractures, the driver would not be able to apply the brakes, increasing the risk of a crash.
Remedy: GM will notify owners, and dealers will inspect the vehicle and replace any affected bracket, free of charge. The recall began July 6, 2015. Owners may contact Cadillac customer service at 1-800-458-8006. GM's number for this recall is 15352.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2015 Cadillac ATS 3.6L V6 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.