The 2018 Cadillac ATS is a compact luxury sedan with chronic turbo and engine longevity issues, particularly the 2.0T. While the chassis is solid, powertrain durability problems and costly transmission repairs make this a risky used buy without comprehensive service records.
Symptoms: sudden loss of power with metallic knocking, low oil pressure warning, excessive oil consumption before failure, white or blue smoke from exhaust
Fix: Complete engine replacement or rebuild required. Piston ring land failure or spun bearings destroy the bottom end. We typically go with reman long-block due to widespread internal damage. 18-24 labor hours for R&R.
Estimated cost: $8,000-12,000
Transmission Oil Cooler Lines Leaking/Failure
Common · high severity
Typical onset: 50,000-90,000 mi
Symptoms: transmission fluid leaking near radiator area, transmission overheating warning, burnt smell from engine bay, slipping gears or delayed engagement
Fix: Oil cooler lines corrode where they connect to radiator or transmission. Often requires replacing hard lines and fittings, sometimes the cooler itself. Awkward access means 4-6 hours labor. Flush and refill required.
Estimated cost: $800-1,500
Transmission Mount Failure (8-Speed Auto)
Common · medium severity
Typical onset: 40,000-80,000 mi
Symptoms: clunking when shifting from park to drive, excessive vibration at idle in gear, harsh shifts or jerking during acceleration, visible sagging of transmission
Fix: Hydraulic transmission mount fails prematurely, especially on 2.0T due to torque delivery. Replacement is straightforward but requires supporting transmission. 2-3 hours labor.
Estimated cost: $400-700
Electric Power Steering Failure (Recall-Related)
Occasional · high severity
Symptoms: sudden complete loss of power steering assist, power steering warning light, intermittent heavy steering effort, steering cuts out during turns
Fix: Electronic power steering motor or control module fails. NHTSA recall 18V-633 covers some units but not all failures. Requires complete steering column or motor assembly replacement. 3-5 hours labor depending on variant.
Estimated cost: $1,200-2,200
CUE Infotainment System Freezing/Failure
Common · low severity
Symptoms: touchscreen unresponsive or frozen, system reboots randomly, backup camera not displaying, climate controls inaccessible
Fix: CUE system has widespread software and hardware issues. Sometimes fixed with software updates, often requires complete module replacement. Programming adds 1 hour. 2-3 hours total labor.
Estimated cost: $800-1,800
Turbocharger Wastegate Rattle (2.0T)
Common · medium severity
Typical onset: 50,000-90,000 mi
Symptoms: rattling sound on cold start that disappears when warm, check engine light with underboost codes, reduced power and boost pressure, turbo whistle or whine
Fix: Wastegate actuator arm wears and rattles inside turbo housing. Eventually leads to boost control issues. Requires turbocharger replacement. 6-8 hours labor due to tight packaging.
Estimated cost: $2,000-3,200
Fuel Pump Failure (Recall 19V-120)
Occasional · high severity
Typical onset: 40,000-100,000 mi
Symptoms: engine stalling while driving, no-start condition, rough idle or hesitation, fuel pump whining noise from rear
Fix: Low-pressure fuel pump in tank fails. Covered under recall 19V-120 but only certain build dates. Tank drop required. 3-4 hours labor if just pump, add time if lines/sending unit also damaged.
Estimated cost: $600-1,200
Owner tips
Change oil every 5,000 miles maximum on the 2.0T — extended intervals kill these engines
Inspect transmission cooler lines annually for corrosion, especially in salt-belt states
Monitor oil consumption religiously; more than 1 quart per 3,000 miles means imminent failure
Keep CUE system updated at dealer; sometimes prevents complete failure
Consider extended warranty if buying used — engine replacement alone exceeds most car values
Hard pass unless you find a unicorn with impeccable service history and low miles under $12k — the 2.0T is a ticking time bomb and repair costs quickly exceed the car's value.
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; use only AGM replacement
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Control Modules — 2018 Cadillac ATS
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.
General Motors LLC (GM) is recalling certain 2016-2018 Cadillac CTS, 2017-2018 Cadillac ATS, Chevrolet Camaro, and Chevrolet Corvette vehicles. The electric power steering (EPS) assist may fail.
Consequence: A loss of power steering assist can require greater steering effort, especially at low speeds, increasing the risk of a crash.
Remedy: Dealers will replace the power steering gear assembly, free of charge. Owner notification letters were mailed April 15, 2025. Owners may contact Cadilac customer service at 1-800-333-4223 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N252497020.
General Motors LLC (GM) is recalling certain 2015-2018 GMC Canyon, 2016-2017 Buick Envision, 2016-2018 Chevrolet Colorado and Malibu, 2017-2018 GMC Acadia, 2018 Buick LaCrosse, Cadillac ATS, Chevrolet Equinox, and GMC Terrain vehicles. The high pressure fuel pump may detach from its mounting flange, possibly resulting in the pump damaging the high pressure fuel line.
Consequence: A damaged fuel line can create a fuel leak, increasing the risk of a fire.
Remedy: GM will notify owners, and dealers will replace the high pressure fuel pump, and high pressure fuel pipe, free of charge. The recall began July 2, 2018. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 18188.
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 2018 Cadillac ATS 3.6L V6 and can vary by trim.
🔧 Built by master technician Chris Hackleman · Master Technician · 20+ years.