Pre-Purchase Inspection Checklist

2015 Subaru Outback pre-purchase inspection checklist

What to check before you buy, built from NHTSA recall data, owner-reported failures, and mechanic intel. Print it or bring it to your mechanic.

Pre-purchase inspection · 2015 Subaru Outback
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2015 Subaru Outback
2.5i / 2.5i Premium / 2.5i Limited / 3.6R Limited (BS, 5th gen, 2015-2019)
Watchful

The 2015 Outback launched the 5th generation — substantially more refined than the 4th-gen wagon it replaced. It is a strong used buy with one big asterisk: the FB25 four-cylinder is implicated in Subaru's oil-consumption class-action settlement (Yaeger v. Subaru), and a meaningful share of these cars consume oil at a rate the owner does not notice until the engine is starved. The 3.6L H6 has none of that drama. Both transmissions are the Lineartronic CVT — generally reliable, but a fluid check is non-negotiable at this age.

Items to check
13
Open recalls
5
NHTSA complaints
612
Top concern
Engine (oil consumption)

Powertrain

FB25 oil consumption (2.5L only)

High Attention
The 2.5L FB25 is the engine covered by Subaru's oil-consumption class-action settlement (Yaeger v. Subaru). Affected cars can burn a quart per 1,000 miles without showing any warning light.
Check the oil level on the dipstick — a level near or below MIN on a car the seller says was "just changed" is the consumption signature. Ask whether a dealer oil-consumption test was ever performed (required to access settlement coverage). Smell the oil for fuel dilution.
Est. cost: $0 if covered by settlement (short-block replacement) / $4,500-$6,500 out of warranty Source: Yaeger v. Subaru class action settlement (2016)

CVT fluid condition

High Attention
Subaru's Lineartronic CVT is generally more reliable than the Nissan Jatco family, but at 10 years old fluid condition is the single best predictor of remaining life.
Pull the CVT dipstick or fill-plug. Fluid should be a translucent amber. Brown, opaque, or burnt-smelling means service is overdue and possibly already too late.
Est. cost: $250-$500 fluid service / $4,000-$7,000 CVT replacement Source: Subaru TSB 16-103-15 + owner reports

Timing chain tensioner rattle (FB25)

Monitor
A brief 3-5 second rattle on cold start is documented wear on the FB25; sustained rattle past 10 seconds is tensioner failure heading toward chain damage.
Have the seller cold-start the engine (it must have sat overnight). Listen for rattle from the front of the engine that persists past 10 seconds.
Est. cost: $900-$1,800 tensioner + chain service Source: Subaru TSB 11-170-16

Driver Assist & Electronics

EyeSight camera self-check (if equipped)

High Attention
EyeSight on Limited trims has its own software update history. A persistent yellow or red EyeSight icon at startup indicates a camera fault — and the camera lives on the windshield, so any windshield work requires full recalibration.
Turn the ignition on and watch the cluster. The EyeSight icon should display momentarily, then clear. Verify the latest software update has been applied via Subaru service records.
Est. cost: $0 (software update) / $400-$1,400 (camera + recalibration) Source: Subaru TSB 07-128-18 + multiple EyeSight software campaigns

Windshield clarity in EyeSight zone

Monitor
The 2015 Outback windshield is more rigid than most competitors' and is therefore more crack-prone. Any chip or crack in the area directly behind the rearview mirror disables EyeSight.
Inspect the top center of the windshield where the rearview mirror mounts. Even a small chip in that zone requires windshield replacement plus EyeSight recalibration.
Est. cost: $1,200-$2,400 windshield + recalibration Source: Common Outback owner reports

Battery parasitic drain

Monitor
Early-build 2015 Outbacks had a known parasitic draw from the infotainment system that would kill the battery if the car sat for more than a week.
Ask whether the battery has been replaced. If the car sat on the dealer lot for more than a few weeks, have it load-tested before purchase.
Est. cost: $200-$350 battery / $0 if TSB software update applied Source: Subaru TSB 15-191-14

Wheels, Tires & Drivetrain

Tire matching (Symmetrical AWD critical)

High Attention
Subaru Symmetrical AWD requires all four tires within 1/32" of tread depth of each other. Mismatched tires will destroy the center differential and viscous coupling within 10,000-20,000 miles — a $3,500+ repair.
Measure tread depth on all four tires with a tire gauge. Any tire more than 1/32" different is a walk-away or a price-renegotiation for a full new tire set.
Est. cost: $600-$1,200 new tire set / $3,500+ center diff replacement if neglected Source: Subaru AWD service documentation

Front wheel bearings

Monitor
Outback front wheel bearings are a known wear item at 80,000-120,000 miles. Symptom is a low hum that changes pitch with vehicle speed.
Listen at highway speed. A worn bearing will get louder when you crown the steering toward the loaded side. Jack each front wheel and rotate by hand to feel for roughness.
Est. cost: $400-$700 per side Source: Common Outback wear pattern

Body & Underbody

Subframe and engine cradle corrosion (salt belt)

Monitor
Subaru subframes rust from inside the boxed sections in salt-belt cars. By 10 years old, Northeast and Upper Midwest Outbacks can show active scaling.
Have the underbody inspected. Probe suspect areas with a flathead screwdriver — if metal gives, it is structural rust, not surface rust.
Est. cost: $1,800-$3,500 subframe replacement if perforated Source: Common salt-belt wear pattern

Rear differential and center diff seal seepage

Monitor
Symmetrical AWD has more seals than a FWD wagon. Expect at least a wet film on rear diff and center diff seals at this age.
Visual inspection of the rear differential housing, axle seals, and the center differential output. Wet film is acceptable; active dripping is not.
Est. cost: $200-$500 per seal replacement Source: Standard wear pattern

Brake lines and fuel lines (salt belt)

High Attention
On a 10-year-old vehicle in any salt-exposed market, brake lines rust from the inside out. A failing line is a sudden brake-failure event, not a gradual one.
Inspect the brake lines along the frame rail and at the rear axle. Look for flaking rust or bulging. Mention any concerns to a brake shop before purchase.
Est. cost: $400-$1,000 full brake line replacement Source: Standard 10-year wear pattern

Documentation

Oil-consumption test on record (FB25 only)

High Attention
If the car is eligible for the Yaeger v. Subaru settlement and the seller has no documented dealer oil-consumption test, that is a free dealer visit you should require before purchase.
Ask the seller for documentation of a dealer oil-consumption test. If none exists, schedule one at a Subaru dealer (no charge) before closing the sale.
Est. cost: $0 (dealer goodwill / settlement coverage) Source: Yaeger v. Subaru settlement requirements

CARFAX clean for structural damage or airbag deployment

Monitor
Outback resale supports cosmetic rebuilds of salvage cars — the price-to-resale ratio makes it economical to rebuild damaged examples.
Run a CARFAX or AutoCheck report. Walk away from any airbag-deployment event, structural-damage report, or total-loss buyback.
Est. cost: Walk away Source: Standard used-car due diligence

NHTSA Recalls (verify completion via VIN)

14V-577
Accessory Trailer Hitch Mounting (WQN-50)
On cars with the Subaru accessory hitch, overtightened mounting nuts can let the hitch detach under tow. Dealer replaces all eight nuts and inspects the studs.
15V-366
Brake Light Switch / EyeSight (WQS-54)
A failed brake-light switch also disables EyeSight automatic pre-collision braking. Dealer reprograms the driver-assist system.
15V-502
Propeller Shaft Seal — Trans Oil Leak (WQU-56)
A deformed seal cap can leak transmission oil onto the exhaust — fire risk. Built Jul 3-27, 2015. Dealer replaces the propeller shaft.
16V-251
ESC Brake Fluid Moisture (WTC-64)
Brake fluid with excess moisture degrades stability-control performance (FMVSS 126). Built Jul 20, 2015. Dealer flushes and replaces the fluid.
Multiple
Open recalls — VIN check
Campaigns vary by build date. Run the VIN at nhtsa.gov/recalls and require every open recall closed before purchase.
After you buy: common DIY repair guides
Planning the upkeep this car will need? Our step-by-step guides cover oil changes, brake pads & rotors, battery replacement, transmission fluid, coolant flushes, and spark plugs — each with the tools, parts, torque specs, and common mistakes that matter. Browse all repair guides →

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