Free used car buyer guide / BS sixth generation / 2015-2019
Subaru Outback common problems and best years
By BYBA Research - how we score cars
Updated 2026-06-12
BYBA Buy Score
7.4/10
1 walk-away risk, 1 serious fault, 6 minor faults documented for this generation, weighted by severity and repair cost. Biggest factor: tr580/tr690 cvt shudder, chain slip or valve-body failure. Score methodology.
The 2015-2019 Outback is a useful used wagon when the buyer treats it like a Subaru with known system weak spots, not a Toyota with roof rails. The money traps are TR580/TR690 CVT shudder or valve-body failure, 2019 Data Communication Module dark-current drain, spontaneous windshield cracking with EyeSight calibration cost, Denso fuel-pump recall exposure on late cars, and 3.6R cooling/oil-leak work on neglected examples. The least stressful buy is a 2018-2019 2.5i Premium or Limited with completed recalls, a healthy battery/dark-current report, no CVT judder, and an original or properly calibrated windshield. Current owners should keep battery, glass and CVT evidence in writing because these cars often move from cheap warning signs to expensive repairs quietly.
Faults covered
8
Highest risk
TR580/TR690 CVT shudder,
Best years
2018-2019
Best buys
- 2018-2019 2.5i with documented CVT fluid service, no DCM draw history and recall printout.
- 2017-2019 3.6R for towing or mountain use if cooling system, valve covers and CVT behaviour are clean.
- Lower-trim 2.5i without power rear gate if the car sits for long periods.
Inspect hard
- Any 2015-2017 car near or beyond 100k miles: scan CVT data and road-test lockup shudder.
- 2019 cars with Starlink/DCM: measure sleeping current before trusting a new battery.
- EyeSight cars with replacement glass: demand calibration paperwork.
Avoid
- Judder, slipping or AT OIL TEMP flashes with no Subaru-capable scan report.
- Repeated dead batteries after alternator/battery replacement.
- Cracked windshield sold as a simple chip repair when EyeSight is fitted.
Next checks
Before you contact the seller
Check the car's history first. Then bring the right tools if it still looks worth viewing.
Primary next step
Check history, title, and recall status
The faults above matter more if the car also has accident history, finance flags, missing service records, or open safety recalls.
Viewing kit
Bring the right tools
Four cheap tools catch most of the faults on this page at a Subaru Outback viewing.
Printable workflow
Take the inspection pack
The PDF is the ordered checklist for the viewing: documents, walk-around, test drive, and scan.
Open PDF optionSome links here are partner links. If you buy through one, BYBA earns a commission. The price you pay does not change. How we make money.
Engines and trims
Which Subaru Outback should you buy?
On most used cars, the engine and trim choice changes the risk more than the mileage does. Narrow this down before you start viewing cars.
FB25 2.5L naturally aspirated petrol with TR580 CVT
2015-2019
BEST BUY IF CVT AND BATTERY TEST CLEAN
This is the common Outback and the one most buyers should start with. The engine is simple enough, but the ownership risk sits around CVT lockup judder, valve-body solenoids, dark-current battery drain, weak windshields and ordinary Subaru oil leaks. A 2.5i that drives smoothly hot and cold is cheaper to own than a neglected 3.6R.
EZ36 3.6R flat-six with TR690 high-torque CVT
2015-2019
GOOD POWER, HIGHER RUNNING COST
The 3.6R is smoother and stronger than the 2.5, especially loaded, but it adds fuel cost, tighter engine-bay labour and more expensive cooling or oil-leak work. It is a good Outback for a buyer who needs the power and has proof that coolant, plugs, valve-cover leaks and CVT behaviour have been handled.
2.5i EyeSight / Limited / Touring electrical-heavy trims
2015-2019
BUY ON MODULE SLEEP AND GLASS HISTORY
The drivetrain is the same as the base 2.5i, but EyeSight, Starlink/DCM, power rear gate and infotainment hardware change the risk profile. A clean dark-current test and calibrated windshield matter more than leather or audio trim. These are good cars only when the electronics sleep and the driver-assist cameras see through correct glass.
Lifted or heavily off-roaded AWD examples
2015-2019
INSPECT DRIVELINE BEFORE ACCESSORIES
Subaru AWD tolerates bad weather, not mismatched tyres and ignored fluids forever. Lift kits, uneven tread depth and repeated dirt-road use can stress wheel bearings, CV joints and transfer clutches. A stock car with four matching tyres is worth more than a modified car with vague service records.
Year notes
Year-by-year buyer advice
Use this to narrow the search before you spend time travelling to view a car.
2015
BS generation launch with 2.5i and 3.6R engines, standard AWD and the first years of the updated cabin/infotainment package.
Buyer: Buy on condition, not mileage alone. Early cars need a careful CVT road test, windshield inspection and check for infotainment freezes.
Owner: At this age, proactive CVT fluid service, coolant condition and wheel-bearing noise checks are more valuable than cosmetic upgrades.
2016
Same basic mechanical package. Subaru's CVT extended-warranty population covers many 2016-era cars, and owner battery/glass complaints continue.
Buyer: Ask whether CVT work was ever requested before 100k miles. A quiet 2016 with Subaru records can be a strong value.
Owner: Keep a service trail for any shudder or AT OIL TEMP event. Intermittent transmission symptoms are easier to support with dated records.
2017
Mature middle-year car before the 2018 refresh. 2.5i and 3.6R remain the main choices.
Buyer: This is a sensible year if the glass is original or correctly replaced and the CVT behaves hot after a long drive.
Owner: Replace ageing batteries with quality AGM/EFB only after checking for draw; otherwise the new battery becomes a temporary patch.
2018
Refresh year with revised styling and infotainment. Some cars enter Denso fuel-pump recall populations depending on build and market.
Buyer: A clean 2018 2.5i is one of the better buys, but recall status and battery history still need proof.
Owner: Keep fuel-pump recall completion with the service history. Hard starting after recall work deserves fuel-pressure diagnosis.
2019
Final BS year. DCM dark-current bulletin coverage is especially relevant, and 2019 complaint data is heavy on battery and windshield issues.
Buyer: Do not accept "new battery" as the answer. Ask for a sleeping-current test and inspect the windshield lower edge under the wipers.
Owner: If the car dies after several days parked, pursue the DCM path before replacing the alternator or another battery.
Common problems
Faults to check before buying
What fails, what it looks like, what it costs, and the quick checks you can do at the viewing - ranked by how badly each one can hurt you.
Fault 1
TR580/TR690 CVT shudder, chain slip or valve-body failure
Affects
2015-2019 2.5i TR580 and 3.6R TR690, most visible around 80k-140k miles or after neglected fluid.
Symptoms
Low-speed shudder, hesitation pulling away, AT OIL TEMP flashing, RPM flare, warm cruising judder, P0700 with pressure-control or lockup solenoid codes.
Typical repair cost
EUR 900-2,200 for valve body/solenoids; EUR 5,000-8,500 for replacement CVT.
Codes / scan clues
P0700, P2764, P2750, P0841, P17xx Subaru transmission codes.
Root cause: Fluid degradation, valve-body solenoid wear and pressure-control faults reduce the CVT's ability to clamp and manage lockup smoothly. Severe cases can damage the chain and pulley surfaces.
Quick check
- Road-test cold and fully hot, including 25-45 mph light throttle.
- Scan the TCM with a Subaru-capable tool.
- Check for AT OIL TEMP history, not just engine codes.
- Ask whether CVT fluid was serviced with Subaru-compatible fluid.
- Reject cars where a seller calls shudder normal AWD feel.
Buyer note
A smooth Outback CVT is easy to live with; a slipping one can exceed the car's profit margin in one invoice.
Owner note
Change fluid before symptoms, then scan quickly if shudder appears. Driving through pressure faults risks turning a valve-body job into a full unit.
Fault 2
2019 DCM dark-current dead battery
Affects
Mainly 2019 Legacy/Outback with Starlink Data Communication Module.
Symptoms
Battery dead after sitting, repeated jump starts, new battery failing quickly, no alternator fault, remote/Starlink oddities.
Typical repair cost
EUR 0 under DCM warranty extension; EUR 250-1,500 depending on diagnosis and module path.
Codes / scan clues
Low-voltage history in body/telematics modules; often no engine code.
Root cause: Internal DCM memory corruption can prevent the module from sleeping, leaving excessive dark current after shutdown.
Quick check
- Measure sleeping current after modules time out.
- Ask Subaru about TSB 15-318-24R.
- Review battery replacement dates.
- Let the car sit before a second start during inspection if possible.
- Check whether Starlink/DCM functions are disabled or bypassed.
Buyer note
A new battery is evidence of a symptom, not proof of a cure.
Owner note
Push for a measured draw report. It is the difference between a warranty-style DCM repair and a pile of replaced parts.
Fault 3
Windshield cracking and EyeSight calibration
Affects
2015-2019 Outback, especially EyeSight-equipped cars.
Symptoms
Edge cracks, cracks spreading from wiper/lower glass area, EyeSight warning after glass replacement, non-OEM glass distortion.
Typical repair cost
EUR 700-1,800 including EyeSight calibration.
Codes / scan clues
EyeSight camera calibration and visibility faults after poor replacement.
Root cause: Owner reports and warranty/settlement history point to fragile windshields; EyeSight turns glass work into a calibration job.
Quick check
- Inspect lower windshield edge and black frit area.
- Look for aftermarket glass markings.
- Confirm post-replacement EyeSight calibration.
- Road-test adaptive cruise/lane functions.
- Ask if the car ever had warranty or settlement glass work.
Buyer note
Price cracked glass as a calibrated safety-system repair, not as an ordinary windscreen.
Owner note
Keep calibration receipts. Future buyers will care more about camera proof than the glass brand.
Fault 4
Denso low-pressure fuel pump recall
Affects
Certain 2018-2019 Outback under Subaru fuel-pump recall populations.
Symptoms
Long crank, stall, no-start, hesitation, fuel-pump noise or sudden power loss.
Typical repair cost
EUR 0 under recall; EUR 500-1,100 retail in non-covered/import cases.
Codes / scan clues
Lean, misfire or fuel-pressure codes may appear; recall VIN status is decisive.
Root cause: Denso pump impellers can crack or deform after fuel exposure, reducing or stopping fuel delivery.
Quick check
- Run the VIN through Subaru/NHTSA recall lookup.
- Ask for WRG-21 or equivalent fuel-pump completion.
- Listen for pump prime and check hard-start history.
- Avoid cars with unexplained stalls until recall status is clear.
- Confirm the tank module was replaced, not only inspected.
Buyer note
This is easy to close when the campaign applies. An open fuel-pump recall should be fixed before handover.
Owner note
Keep the recall invoice and watch for hard starts after the repair, because fuel-pressure symptoms can also be misdiagnosed as battery trouble.
Fault 5
Power rear gate module, strut and latch faults
Affects
2015-2019 Outback Limited/Touring and other power-liftgate trims.
Symptoms
Rear gate opens then reverses, beeps but will not move, drains battery after failed close, bent strut or latch misalignment.
Typical repair cost
EUR 250-900 for latch/module/strut diagnosis; more if wiring damage is found.
Codes / scan clues
Body control and rear-gate module codes; often not visible on generic OBD.
Root cause: Gate motor/strut loads, latch position errors and module wake behaviour can combine, especially after weak-battery events.
Quick check
- Open and close the gate several times.
- Check hands-free/manual release behaviour.
- Inspect struts for bending or oil leakage.
- Scan body modules after any gate warning.
- Ask if the rear gate has ever caused a dead battery.
Buyer note
A power gate that works once at the viewing is not enough; cycle it repeatedly and watch for battery-related oddities.
Owner note
Fix latch alignment and weak struts before the module starts staying awake or the motor overloads.
Fault 6
Infotainment head unit freezes, delamination and camera glitches
Affects
2015-2019 Outback, worse on navigation/Harman units and 2018-2019 refresh cars.
Symptoms
Screen freezes, ghost touches, Bluetooth dropouts, backup camera delay, navigation reboot or audio unit failure.
Typical repair cost
EUR 150-400 for software/used unit attempts; EUR 900-1,700 for new head unit.
Codes / scan clues
Infotainment-specific faults; usually no powertrain DTC.
Root cause: Ageing head-unit hardware, software instability and touchscreen failure create repeated cabin-electronics complaints.
Quick check
- Pair a phone and run CarPlay/Bluetooth if fitted.
- Test backup camera immediately after selecting reverse.
- Watch for ghost touches during a long test drive.
- Check service history for head-unit replacements.
- Confirm steering-wheel controls and audio buttons work.
Buyer note
A dead screen is not a reason to reject every Outback, but it should change the price because new units are not cheap.
Owner note
Update software before replacing hardware, then document any repeat freezes for goodwill or used-unit warranty.
Fault 7
Wheel bearing and CV axle noise
Affects
2015-2019 AWD cars, especially high-mileage or rough-road examples.
Symptoms
Humming that changes with speed, vibration under load, clicking on full lock, rear bearing drone.
Typical repair cost
EUR 350-700 per wheel bearing; EUR 300-800 per axle depending on parts.
Codes / scan clues
Usually none; ABS wheel-speed codes only if sensor/hub damage occurs.
Root cause: Constant AWD load, road salt, potholes and mismatched tyres accelerate hub and axle wear.
Quick check
- Listen at 40-70 mph on smooth road.
- Load each side gently with lane changes.
- Turn full lock in a car park.
- Check tyre brand, size and tread depth match.
- Inspect axle boots for grease spray.
Buyer note
Do not let Subaru road noise hide a bearing drone. One noisy corner often leads to more work soon after purchase.
Owner note
Replace noisy bearings before they damage sensors or tyres; keep all four tyres closely matched.
Fault 8
3.6R valve-cover, cooling and spark-plug labour cost
Affects
2015-2019 Outback 3.6R EZ36, especially high-mileage cars.
Symptoms
Oil smell, seepage onto exhaust, coolant smell, rough idle from delayed plug service, higher fuel use than expected.
Typical repair cost
EUR 500-1,300 for valve-cover work; EUR 400-1,000 for plugs/cooling repairs; more for radiator or head work.
Codes / scan clues
P0300-P0306 misfires if plugs/coils are neglected.
Root cause: The flat-six is durable but crowded. Ageing seals, coolant hoses and plug access make normal maintenance more expensive than on the 2.5.
Quick check
- Inspect lower valve-cover area with a light.
- Smell for hot oil after the test drive.
- Check coolant level and radiator condition.
- Confirm spark-plug service with invoice.
- Scan for misfire history.
Buyer note
The 3.6R is worth paying for only when the seller has maintained it like the higher-cost engine it is.
Owner note
Group plug, coil and leak work where possible; labour overlap matters on the flat-six.
Inspection pack
Printable checklist for the viewing
The free page helps you decide whether the car is worth seeing. The paid guide is the ordered, printable checklist you use at the car.
Documents
- Subaru/NHTSA recall printout for the exact VIN.
- CVT service or diagnostic invoices, especially before 100k miles.
- Battery replacement dates and any dark-current report.
- Windshield replacement and EyeSight calibration paperwork.
Walk around
- Inspect windshield edges, lower wiper area and glass brand markings.
- Check tyre size, brand and tread depth match on all four corners.
- Look under the engine for oil seepage and coolant residue.
- Cycle the power rear gate repeatedly if fitted.
In the car
- Test infotainment boot, phone pairing, camera and steering-wheel buttons.
- Confirm no EyeSight warning after startup.
- Check battery age and resting voltage.
- Scan body modules, not only generic OBD.
Test drive
- Drive until the CVT is fully warm, then hold light throttle at 25-45 mph.
- Listen for bearing hum at highway speed.
- Test full-lock turns for axle clicking.
- Check for hesitation, RPM flare or AT OIL TEMP warning.
Scan tool
- Subaru-capable TCM scan for CVT pressure/solenoid codes.
- Body/telematics scan for low-voltage and DCM history.
- Misfire counters on 3.6R and high-mileage 2.5i.
- ABS/wheel-speed sensor history if hub noise is present.
Bottom line
Buy: Choose a 2018-2019 2.5i with completed recalls, smooth hot CVT behaviour, clean dark-current test and calibrated original/replacement windshield. A well-documented 3.6R is a good specialist buy when the extra power is actually needed.
Avoid: Walk away from active CVT slip, repeated battery failure with no DCM diagnosis, and cracked EyeSight glass priced like ordinary cosmetic damage. These are not personality quirks; they are the main ways a cheap Outback becomes expensive.
Quick answers
Subaru Outback buyer questions
The short versions of what this page answers in full.
What are the most common Subaru Outback 2015-2019 problems?
The highest-impact documented faults are: TR580/TR690 CVT shudder, chain slip or valve-body failure; 2019 DCM dark-current dead battery; Windshield cracking and EyeSight calibration. This guide covers 8 faults in total, each with symptoms, typical repair costs, and checks you can do at a viewing.
Which Subaru Outback years are the best to buy?
2018-2019 stand out in this generation. Choose a 2018-2019 2.5i with completed recalls, smooth hot CVT behaviour, clean dark-current test and calibrated original/replacement windshield. A well-documented 3.6R is a good specialist buy when the extra power is actually needed.
Which Subaru Outback should I avoid?
Walk away from active CVT slip, repeated battery failure with no DCM diagnosis, and cracked EyeSight glass priced like ordinary cosmetic damage. These are not personality quirks; they are the main ways a cheap Outback becomes expensive.
Is the Subaru Outback 2015-2019 a reliable used buy?
BYBA scores it 7.4/10 (buy with checks). 1 walk-away risk, 1 serious fault, 6 minor faults documented for this generation, weighted by severity and repair cost. Biggest factor: tr580/tr690 cvt shudder, chain slip or valve-body failure.
Get updates when this guide changes
Recalls get added, repair costs shift, and new fault patterns show up in the data. Leave an email and we'll tell you when the Subaru Outback guide gets a meaningful revision. Nothing else, no selling your address.
Research basis
- static.nhtsa.gov: MC-10150931-9999.pdf
- static.nhtsa.gov: MC-11014843-0001.pdf
- subarucomplaints.com: 6
- carcomplaints.com: 2019
- samarins.com: outback-15.html
- subarubatterysettlement.com
- subaruwindshieldsettlement.com
- classaction.org: subaru-recall-21v587.pdf
- whatcar.com: advice
- api.nhtsa.gov: recallsByVehicle
- Subaru Outback CVT owner reports
- Rohnert Park Transmission Subaru CVT guide
- SubaruComplaints battery drain overview
- NHTSA recall API 2018 Outback
- Outback owner power-gate reports
- Subaru Outback owner common-issue thread