Used Cadillac ATS 1st Gen (2013-2019): Buyer's Guide

The piston damage is documented at 7,000 miles. Not 70,000. Seven thousand. A 2013 Cadillac ATS 2.0T driven off a dealer lot could need a complete engine replacement before the first oil change was due. GM issued three separate technical service bulletins about it.

The same car rides on the Alpha platform, purpose-built to beat the BMW 3 Series at its own game. GM engineers literally benchmarked the E46 — the version BMW enthusiasts still cite as the gold standard for driver-focused compact sedans — and produced an ATS that weighs less, corners harder, and costs significantly less to own per year than its German rivals. In a 2014 comparison, an independent BMW enthusiast publication found the ATS 2.0T genuinely competitive with the 328i on a canyon road.

The ATS story is a split verdict. One generation. One brilliant chassis. Four powertrains with dramatically different reliability profiles. The difference between a great ATS buy and a money-pit ATS buy comes down entirely to which engine and which model year you choose.

This Generation at a Glance

The ATS is the first vehicle built on GM's Alpha platform, an architecture designed from scratch for a rear-wheel-drive performance sedan competitive with European compact luxury. The platform later underpinned the 6th-gen Camaro.

The sedan ran 2013 through 2018. The coupe launched for 2015 and survived one extra year through 2019. Cadillac replaced both with the CT4 for 2020.

Platform specs: 51/49 front-to-rear weight distribution, curb weight of 3,315 to 3,461 lbs depending on configuration (lighter than the E46 3 Series it targeted), and available Magnetic Ride Control adaptive dampers on top trims.

Market pages: 2016 ATS | 2017 ATS | 2018 ATS | 2019 ATS

Powertrain and Trim Breakdown

2.5L I-4 (2013-2016): Skip It

202 horsepower in a 3,300-pound sport sedan is undersized for the car. The 2.5L was offered only in sedans, only through 2016, and Cadillac dropped it for 2017 when sedans from that trim level moved to the 2.0T as a base engine. Its one advantage is 28-33 mpg highway. If fuel economy is the priority, a front-wheel-drive Accord does it at half the price without the complexity of a rear-wheel-drive luxury sedan.

Skip the 2.5L. There is no version of this engine worth buying for a driver's car.

2.0L Turbo I-4 (LTG): Complicated

The LTG 2.0T is the ATS's most popular engine and its most troubled, depending on the model year.

2013 and early 2014 production carries serious risk. GM installed spark plugs with the wrong heat range for this application. The plugs ran too hot, causing low-speed pre-ignition (LSPI) events during cold cranking. LSPI creates extreme cylinder pressure spikes, and the pistons cracked. Owners needed complete engine replacements at 6,350 miles and 7,000 miles. Some had the failure twice before GM applied the fix. NHTSA received 46 engine complaints on the 2013 ATS alone.

GM issued TSB 14591 in 2014 (later revised as PI1178A through PI1178F through 2018), directing dealers to reprogram the ECM with revised spark timing and install colder-range spark plugs. The program ran through December 31, 2016. On a 2013-2014 car without service records showing this reprogramming, assume it was never done.

By 2015, GM had corrected the calibration and plug specification in production. Complaints dropped sharply. The 2016+ 2.0T is a substantially different ownership proposition.

Problems that persist across all 2.0T years:

The LTG is a direct-injection engine. Fuel never washes the back of the intake valves. The PCV system routes oil vapor through three separate valves into the intake, and that oil bakes onto hot valve surfaces. At 30,000 to 50,000 miles, carbon deposits get thick enough to cause rough cold starts, P0300 misfire codes, and hesitation under load. The fix is walnut shell blasting of the intake ports: $400 to $600 at an independent shop. This is not optional past 60,000 miles. An oil catch can ($150 to $250 for an ATS-specific kit from Mishimoto or Maverick Man Carbon) slows future buildup. The three-port PCV system makes installation more involved than on most cars.

The water pump on the 2.0T is buried behind the timing cover. Accessing it requires major front-of-engine disassembly. Failures are documented around 70,000 to 82,000 miles, with repair costs from $885 to $1,327. Warning signs include the "A/C off due to engine temp" message on the dash, coolant smell without visible puddles, and temperature fluctuation with the A/C running. Budget for this repair on any 2.0T above 70,000 miles.

GM's official threshold for 2.0T oil consumption is 1 quart per 2,000 miles. Check the dipstick every 2,000 to 3,000 miles, not when the oil life monitor says so. A 2.0T that runs low on oil will wear out the turbocharger before it wears out anything else.

The wastegate actuator arm has play in its resting position, producing a brief rattle or tick when revving in Park between 1,500 and 2,200 RPM. GM issued TSB MC-10139275 in 2018. The fix involves tightening catalytic converter bracket nuts and potentially a cup spring washer on the wastegate, or full turbocharger replacement if the actuator part numbers match affected units. Most owners negotiate this cost into the purchase price rather than avoid the car over it.

Owner consensus on CadillacForums.com: The 2016+ 2.0T is a viable daily driver with attentive maintenance. The 2013 to 2015 2.0T is a risk that depends entirely on whether the early problems were addressed under warranty. The 3.6L V6 is the cleaner used-market choice.

3.6L V6 (LFX): The Reliable Version of This Car

The 3.6L LFX is the engine that most owners who've driven both powertrains end up recommending. No turbocharger complexity, no carbon buildup problem (the LFX uses a mix of port and direct injection on later versions), and a water pump that sits outside the engine where a mechanic can reach it without pulling the timing cover.

The main known issue is timing chain wear. The LFX uses three chains with plastic guides and tensioners. Early 2013 production had some premature wear cases, partly attributed to GM's aggressive OLM intervals that allowed oil changes at 20,000-mile intervals in early calibration. GM updated the chain hardware specification for 2014. A metallic rattle on cold start that fades within 5 to 10 seconds is the classic symptom. A rattle that persists longer needs diagnosis.

Timing chain tensioner failures on the 3.6L are documented starting around 80,000 to 120,000 miles, with occasional early cases on 2013 to 2014 engines. Full replacement runs $2,500 to $4,500 at independent shops, a 10 to 14-hour engine-out job. A 2015 or later 3.6L with documented 5,000-mile oil changes has meaningfully lower risk.

Oil consumption affects the V6 too, primarily through the PCV system. Pre-2014 engines had an oversized PCV orifice that ingested oil vapor into the intake. Post-2014 units are better. Check the oil level before a test drive.

All AWD ATS models with the 3.6L carry the rear differential seal issue documented in TSB PIP5898 (issued 2023). An improperly oriented internal bearing retaining ring blocks the oil port to the axle seal. The seal runs dry, fails, fluid leaks out, and the differential eventually destroys itself. Repair runs $2,000 to $4,000. The warning signs are reddish-brown fluid spots under the rear axle and a whining or howling sound from behind the car that increases with vehicle speed. Any AWD 3.6L purchase should include a check under the rear of the car.

Owner consensus: V6 owners consistently report better high-mileage experiences than 2.0T owners. Multiple V6 owners on CadillacForums have documented 120,000 to 150,000 miles with only CUE screens, differential seals, and normal wear items as unplanned costs.

ATS-V 3.6TT (LF4): The Performance Version

The ATS-V uses a 464-horsepower twin-turbocharged V6, Brembo brakes, Magnetic Ride Control, and a limited-slip differential as standard equipment. When new, it was priced $15,000 to $20,000 below a comparable BMW M3. Used, the gap is even wider.

Avoid the 2016 ATS-V specifically. Manufacturing debris from the intake manifold embedded in cylinder bores during assembly at the Lansing Grand River plant. The debris abraded cylinder walls and piston rings, causing oil to enter combustion chambers. Symptom: blue smoke visible 2 to 5 seconds after a cold start, most obvious with remote start. Some owners had cylinder heads and turbos replaced, only to have the smoking resume 4,000 miles later when the bore damage caused a second failure. Engine replacements were eventually authorized. GM corrected the manufacturing process for 2017.

The 2016 ATS-V also had turbocharger shaft seal failures, which produce identical blue smoke symptoms through a different mechanism. TSB 18-NA-031 addresses both issues, but the 2016 model year is the problem year.

The 2017, 2018, and 2019 ATS-V models have a substantially cleaner record. Owners at 70,000 to 110,000 miles on 2017 and later cars report strong satisfaction. ATS-V forums rate it as one of the most rewarding performance cars available at its used price point.

The intercooler coolant system on the ATS-V is sealed with no dipstick or reservoir. If air enters the circuit, the electric pump shuts off and intercooler effectiveness drops, leading to power loss and potential engine damage under continued boost. Diagnosis requires vacuum fill equipment and the correct fitting revision. If a seller mentions overheating events on an ATS-V, this system needs inspection.

Owner consensus from ats-v.org and CadillacForums: A 2017+ ATS-V with a clean history and no blue smoke on cold start is one of the best performance values in the used market. The 2016 model year should be avoided unless a full engine inspection and documented repair history can confirm the manufacturing issue was resolved.

Trim-Specific Notes

The four main trims are Standard, Luxury, Premium Luxury, and Premium Performance. The structure evolved across the model run, but the hierarchy is consistent.

Standard is the minimum entry point. Leatherette seats, basic audio, Bluetooth, power front seats, cruise control. It's missing the backup camera and park assist that the Luxury adds.

Luxury is the floor worth considering. Genuine leather, backup camera, front and rear park assist, remote start, push-button start, auto-dimming mirror, and driver seat memory. The CUE touchscreen is standard here.

Premium Luxury adds adaptive xenon headlights, panoramic sunroof, automatic wipers, forward collision alert, blind-spot monitoring, lane departure prevention, and rear cross-traffic alert. These active safety features add meaningful value for buyers who will use the car in daily traffic.

Premium Performance is the trim to target for anyone who bought an ATS for the handling. It adds Magnetic Ride Control adaptive dampers, a limited-slip differential, sport suspension tuning, a head-up display, and 18-inch wheels with summer performance tires.

There is a critical caveat. AWD and the Premium Performance package are mutually exclusive. You cannot have Magnetic Ride Control, the LSD, and AWD on the same car. The manual transmission also gets the LSD regardless of trim. If handling is the reason you're buying an ATS, choose RWD. If you're in a snowy climate and need AWD, you lose the sportiest chassis setup the car offers.

Which Model Years to Target Within This Generation

2013 and 2014 account for approximately 90% of all documented ATS owner complaints per aggregated NHTSA data. The 2013 ATS had 4 separate safety recalls, including 91,000 vehicles for transmission cable detachment that prevented proper engagement of Park, and 48,114 vehicles for lap belt pretensioners that could fail to lock after deployment.

The 2017 is the inflection point where the car became what it was supposed to be from launch. The 2.0T piston issues are two model years behind it. The CUE hardware received a meaningful revision (CUE 2.5) with substantially fewer delamination reports. Apple CarPlay became more widely available. Fewer than 0.3 unscheduled shop visits per year is the documented average for this period.

For coupe buyers: the 2019 is the cleanest option. No safety recalls, final year, and the coupe has held its used value better than the sedan. A 2019 coupe in Luxury trim with 50,000 miles runs $20,000 to $27,000. A 2017 or 2018 sedan in comparable trim runs $10,000 to $19,000.

Pre-Purchase Inspection Checklist

For all ATS models:

Check the CUE touchscreen before anything else. Press each corner of the screen. Look for spider-web cracking patterns or visible air bubbles between the glass and the display layer. A delaminating screen spreads quickly. Dealer replacement costs $1,500 to $2,000. Third-party repair services handle the screen-only fix for $200 to $600. Budget either number into your offer if you see any bubbling. Note: GM established a CUE Limited Special Reimbursement Program for 2013 to 2017 ATS vehicles. Ask the seller if a dealer-paid replacement was done under this program.

Run the VIN through a recall check. The transmission cable detachment recall (14V338) affects 2013 to 2014 cars. The rear defroster fire risk recall (15V558) covers 2013 to 2016 sedans. The power steering recall (19V086) covers 2017 models. These are completed at no cost at a Cadillac dealer, but verify they were actually done.

On AWD models: look under the rear of the car for reddish-brown differential fluid. A small seep becomes a large bill if ignored.

2.0T specific:

Cold start only, before the engine warms. Listen for misfires, rough idle, or a stumble in the first 30 seconds. Carbon buildup on intake valves shows up as hesitation on cold starts before the engine reaches operating temperature. If you hear it, ask for walnut blast service records.

Rev to 1,500 to 2,200 RPM in Park. A brief rattle at that RPM range is the wastegate actuator. Factor it into negotiation but don't walk over it alone.

Pull the dipstick. If the level is below full, the engine is consuming oil faster than expected. Low oil on a 2.0T means turbocharger wear is already in progress.

On 2013 and 2014 cars: ask for any service records showing ECM reprogram TSB 14591. If no records exist, budget for the possibility that the piston issue was never addressed.

With A/C running and the car sitting at idle: watch the temperature gauge for 10 minutes. If it climbs above the normal range, the radiator cooling fan is failing. Replacement runs $300 to $600 and is more common than it should be on 2017 to 2018 models.

3.6L V6 specific:

Cold start only. A brief metallic rattle that fades within 5 to 10 seconds is acceptable on 2013 units and indicates normal timing chain pre-lube. A rattle that persists past 15 seconds needs an inspection.

On 2013 and 2014 V6 cars with rough idle vibration at a stop: failing motor mounts are the usual cause. GM redesigned them for 2015. Replacement runs $808 to $1,104, a minor cost but worth negotiating.

Ask how frequently oil changes were done. The 3.6L's timing chain health above 80,000 miles correlates directly with whether the oil was changed every 5,000 miles or every 15,000 miles per the OLM.

ATS-V specific:

Cold start using remote start if possible on 2016 models. Watch for visible blue smoke 2 to 5 seconds after ignition. Any visible smoke is a red flag for the manufacturing debris issue or turbo shaft seal failure. On 2016 ATS-Vs specifically, the only clean buy is a car with documented engine replacement history and confirmed resolution.

Check brake rotors for scoring or uneven wear. Track-used ATS-Vs develop pad material deposits causing thickness variation, which produces steering wheel vibration under hard braking.

Running Costs

RepairPal gives the ATS 3.5 out of 5.0 stars for reliability, ranking it 5th out of 17 luxury compact cars. Average annual repair cost is $741 versus $801 for the segment. Unscheduled shop visits average 0.3 per year versus 0.7 for the class average. For comparison, RepairPal puts the BMW 328i at $968 per year and 0.9 unscheduled visits.

A 10-year maintenance study found Cadillac costs $225 per year to maintain in years 5 through 10 versus $911 for BMW and approximately $908 for Mercedes-Benz. The ATS's insurance premium ($2,258 per year for full coverage, 40-year-old clean record) runs higher than a similarly-aged BMW 328i ($1,936), offsetting some of the maintenance savings.

Key scheduled items: oil change every 5,000 miles regardless of OLM reading, walnut blast at 60,000 miles and every 40,000 miles after that on the 2.0T, timing chain tensioner inspection above 80,000 miles on the 3.6L, differential seal inspection on any AWD car with more than 50,000 miles.

FAQ

Is the Cadillac ATS reliable? The 2017 to 2019 ATS with the 3.6L V6 is genuinely reliable: $741 average annual repair cost, 0.3 unscheduled shop visits per year, better than the luxury compact segment on both metrics. The 2013 to 2014 ATS with the 2.0T is not reliable: documented engine failures under 15,000 miles, four safety recalls in its first model year, and a class-action lawsuit over the infotainment screen.

Which year Cadillac ATS should I avoid? Avoid 2013 and 2014 without exception. They have the most recalls, the 2.0T piston failure issue, and the highest owner complaint counts of any ATS model year. The 2015 improved but carries residual 2.0T risk. If a 2013 or 2014 is the only option, choose the 3.6L V6, verify all recalls are completed via VIN check, and get service records showing the TSB 14591 reprogram was done on any 2.0T.

Is the ATS 2.0T or 3.6L V6 more reliable? The 3.6L V6 is the cleaner used-market choice. The 2.0T has more failure modes at lower mileages: carbon buildup requiring walnut blasting every 40,000 to 60,000 miles, a buried water pump requiring engine disassembly to access, an aggressive PCV system that needs a catch can, and the pre-ignition piston issue on 2013 to 2015 production. Forum consensus on CadillacForums is consistent: buy the V6 unless fuel economy is a hard requirement.

How many miles does a Cadillac ATS last? The 3.6L V6 ATS with documented oil changes can reach 150,000 miles with predictable maintenance costs. Multiple CadillacForums members have documented 120,000 to 150,000 miles on V6 cars with only planned maintenance and CUE screen replacements as notable costs. The 2.0T can also reach high mileage with attentive care, but requires more active management: check oil every 2,000 miles, walnut blast every 40,000 to 60,000 miles, catch can installed.

Is the ATS-V worth buying used? A 2017 or later ATS-V with a clean history and no blue smoke on cold start is one of the most compelling performance buys in the used luxury market. At $25,000 to $35,000, you get 464 horsepower, Brembo brakes, and Magnetic Ride Control for roughly half the price of a comparable BMW M3 vintage. Avoid the 2016 model year. The manufacturing defect that caused engine failures on 2016 ATS-Vs is well-documented on ats-v.org, and the risk is not worth taking without a full inspection and repair history.

Bottom Line

The 2017 or 2018 ATS with the 3.6L V6 in RWD configuration is the best version of this generation. It has the corrected reliability record, the improved CUE hardware, and the full performance chassis. The Premium Performance trim with Magnetic Ride Control and the LSD is the one to find in RWD only. Avoid the 2013 to 2014 2.0T unless you can verify TSB 14591 was applied and you're pricing the car accordingly. For the ATS-V, 2017 or later only.

Run every VIN through a recall check before making an offer. Several campaigns on this generation cover safety-critical systems that are free to fix at a Cadillac dealer. CarScout members can set alerts on specific ATS model years, trims, and mileage thresholds to track price movement on the right example. Find it at usecarscout.com.

Data sourced from NHTSA recalls database, EPA fuel economy data, and real owner experiences from cadillacforums.com, CadillacVNet, ats-v.org, RepairPal, CarComplaints.com, Consumer Reports, JD Power, and Fuelly (213 ATS owners, 3.5 million miles). See the full Cadillac ATS market data for current pricing and inventory.