Most Common Subaru Outback & Forester Problems and Repair Costs

Subaru's reputation for reliability is well-earned on some models and well-inflated on others. Here's what we actually see.

Subarus are popular in our area among families, outdoor enthusiasts, and anyone who values all-wheel-drive in a package that doesn't cost as much as an Audi. The Outback and Forester are the top sellers. We service a fair number of them at our Ladson shop, and the pattern is consistent: certain generations are excellent, certain generations have problems significant enough that they affect resale value and long-term ownership costs, and knowing the difference before you buy a used one matters.

The Subaru story breaks into clear chapters: the head gasket era, the oil consumption era, the CVT trouble era, and the current generation that's largely resolved those issues. Here's the whole picture.

📋 In This Article

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Head Gasket Failures: Subaru's Most Famous Problem

The Subaru head gasket problem is so well-known that it's part of used car buyer folklore — "never buy a Subaru with the old four-cylinder engine without a head gasket inspection." This reputation is earned, and it has a specific generation footprint.

The EJ-series engine (used from 1996 through approximately 2011) had head gasket problems across two distinct failure modes:

Early EJ engines (1996–1999): Internal head gasket leaks. Coolant enters the combustion chamber. Symptoms include white exhaust smoke after warmup, milky oil, and overheating. This is the more serious failure mode.

Later EJ engines (2000–2011): External head gasket leaks. Oil and coolant leak externally at the head-block seam. You may see oil residue on the side of the engine, or coolant level that slowly drops. The engine doesn't overheat as dramatically, but the leak accelerates if ignored and can eventually cause overheating damage.

On the 2.5L naturally aspirated EJ engine (the non-turbo version found in base Outbacks and Foresters), head gasket failure was particularly common. Reports of failure by 100,000 miles were routine, not exceptional. Our engine repair services cover Subaru head gasket replacement, including both EJ and FB-series engines.

The FB-series engine (used from 2010 in newer models) largely resolved the head gasket issue. The FB25 engine that replaced the EJ in the Outback and Forester uses multi-layer steel head gaskets and a revised design that is not prone to the same failure. If you're looking at a 2015+ Outback or Forester with the FB25 engine, head gaskets are not a primary concern.

Head gasket repair cost: $1,200–$2,500 depending on which leaks are present, whether the coolant system needs flushing, and whether overheating occurred before repair. At high mileage with an old engine, this repair can approach or exceed the vehicle's value.

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CVT Transmission Failures (2010–2018)

When Subaru transitioned to continuously variable transmissions, the early units had reliability issues that proved expensive for owners and damaging to Subaru's reliability reputation.

2010–2014 Outback and Forester CVTs were most problematic. Owners reported shuddering during acceleration, hesitation, slipping, and in some cases complete failure. Subaru extended the CVT warranty on 2010–2018 models to 10 years or 100,000 miles in response to the documented problems. If you're within that window, CVT replacement is covered. Outside it, a CVT replacement is $3,000–$7,000 — one of the most expensive repairs on these vehicles.

Neglected CVT fluid is a major contributor. Subaru historically listed CVT fluid as "lifetime fill" — meaning no service interval. Most experienced technicians and Subaru specialists strongly disagree with this stance. CVT fluid degrades from heat and shear, and degraded fluid accelerates internal wear. We recommend CVT fluid changes every 30,000–60,000 miles on Subarus. The fluid service costs $150–$250 and is cheap insurance against a $5,000 transmission. Our transmission repair services include CVT fluid analysis, drain-and-fill service, and full transmission diagnostics for all Subaru models.

2015–2018 CVTs improved but still showed more issues than the competition. We recommend regular fluid service on all of these.

2019+ CVTs are significantly better. The current Outback and Forester use a revised TR580 CVT that has a much cleaner reliability record.

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Oil Consumption and the Class Action

From approximately 2011–2015, the FB25 2.5L engine in the Outback and Forester developed a reputation for excessive oil consumption. The piston ring design allowed oil to pass into the combustion chamber and burn. Owners reported needing to add a quart of oil every 1,000–2,000 miles — with no external leak.

This became so widespread that a class action lawsuit was filed alleging Subaru knew of the defect and failed to disclose it. Subaru settled, providing extended warranty coverage and offering free oil consumption tests on affected vehicles. Subaru extended the warranty on 2011–2015 affected vehicles to 8 years or 100,000 miles for oil consumption-related issues.

If you own a 2011–2015 Outback or Forester and notice oil consumption without a visible leak, you may still qualify for covered repairs. Check your oil level every 1,000 miles and bring documentation of the consumption to a dealer for an oil consumption test.

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Windshield Cracking (2015–2022 Outback)

This one surprises Subaru owners more than almost anything else: the windshield on 2015–2022 Outback models is unusually prone to cracking from minor impacts. Owners have reported small chips turning into full-length cracks in days, replacement windshields cracking within weeks, and the problem recurring multiple times on a single vehicle.

The issue is partly related to the EyeSight camera system mounted at the windshield's top edge, which requires a specific OEM windshield with calibrated optical properties. Aftermarket windshields don't always support EyeSight calibration correctly. The OEM windshield itself has been criticized for excessive fragility.

What to know: If you drive a 2015–2022 Outback, get comprehensive glass coverage through your insurance — it typically adds only a few dollars per month and covers windshield replacement. An OEM Subaru windshield with EyeSight calibration costs $800–$1,200 to replace. After replacement, the camera system must be recalibrated, adding another $100–$250.

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Wheel Bearing Wear

Subaru's symmetrical AWD system runs all four wheels continuously — unlike part-time AWD systems that only engage the rear wheels when slip is detected. Constant engagement is the source of Subaru's exceptional traction, but it also means all four wheel bearings work continuously and experience more wear over time than in a two-wheel-drive vehicle.

Wheel bearing failure produces a humming or growling noise that changes with vehicle speed and sometimes varies when you steer left or right (the noise changes as weight transfers). It's most noticeable at highway speeds. Bearing replacement: $200–$350 per wheel.

We service Subaru wheel bearings regularly at 80,000–120,000 miles. On vehicles driven aggressively or in flooded areas (common in our region), failure can occur earlier.

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CVT Fluid: The Most Neglected Service

We've mentioned this above, but it deserves its own section because it's the most impactful thing a Subaru owner can do to extend transmission life and the most commonly missed service we see.

Subaru's owner manual for many models lists CVT fluid as "inspect only" or "lifetime fill." Do not follow this guidance if you plan to keep your Subaru past 100,000 miles. Fluid degradation is a primary contributor to CVT failure on 2010–2018 models.

Service interval we recommend: every 30,000 miles, or every 3 years.

Cost at our shop: $150–$250 for a drain-and-fill. A new CVT: $3,000–$7,000.

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Which Years to Avoid and Which to Buy

Outback:

• Avoid for value: 2010–2014 (CVT issues most severe; head gaskets on older EJ engines)
• Inspect carefully: 2011–2015 (oil consumption; get Subaru oil consumption test documentation)
• Buy with confidence: 2016–2017 (improved), 2020+ (best modern generation)

Forester:

• Avoid for value: 2009–2010 (EJ head gaskets), 2014–2015 (oil consumption, CVT)
• Inspect carefully: 2016–2018 (CVT service history critical)
• Buy with confidence: 2019–2021 (5th gen is significantly improved), 2022+

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Repair Cost Table

Problem	Years	Typical Cost	Notes
Head gasket replacement	Pre-2011 EJ engine	$1,200–$2,500	Both sides typically done together
CVT replacement	2010–2018	$3,000–$7,000	Check extended warranty first
CVT fluid service	All CVT models	$150–$250	Every 30k miles
Oil consumption repair (ring replacement)	2011–2015	$1,000–$2,000	Check warranty coverage first
Windshield replacement + EyeSight calibration	2015–2022 Outback	$900–$1,400	Use comprehensive insurance
Wheel bearing replacement	All 80k+ miles	$200–$350/wheel	AWD = all 4 wear
Valve cover gasket	EJ engine, 80k+	$300–$500	Common oil leak source

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Ladson Auto Repair Shop — 3322 Ladson Rd, Ladson, SC 29456.