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Subaru Outback Problems & Known Issues

The most common Subaru Outback problems ranked by severity — what to watch for, what it costs to fix, and what happens if you ignore it.

Generations

BP — Second Generation
1998–2003
2.5 H4
BL — Third Generation
2003–2009
2.5 H4, 3.0 H6, 2.0 Boxer Diesel
BR — Fourth Generation
2009–2014
2.5 H4, 3.6 H6, 2.0 Boxer Diesel
BS — Fifth Generation
2014–2019
2.5 H4, 2.0 Boxer Diesel

Top issues to watch for

The most serious Subaru Outback problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.

Dangerous
Subframe and suspension mounting point corrosion (BL/BR/BS)
BL, BR, BS2003–201960k–150k miles
The rear subframe and suspension mounting points are prone to corrosion on Outback models from 2003 onwards. MOT data shows failures at 897.1 times the fleet average, with the 3.0-litre model particularly affected between 60-80k miles. The corrosion affects the load-bearing structure within the prescribed MOT inspection area around suspension mounting points. This is a structural safety issue that can lead to suspension component detachment while driving.
What happens if ignoredIf the subframe or mounting points fail structurally, suspension components can detach from the vehicle while driving, causing immediate loss of control. Welded repairs to load-bearing areas must meet strict MOT standards and typically cost £800-2000 depending on the extent of corrosion. The vehicle is not safe to drive with significant structural corrosion.
Independent garage
£800–£2,000
Specialist
£1,000–£2,500
Main dealer
£1,500–£3,500
Parts only
£200–£800
Major
Suspension component wear and corrosion (All generations)
BP, BL, BR, BS1998–201940k–150k miles
Outback models show consistently high rates of suspension component wear across all generations. MOT data reveals failures at up to 897.1 times the fleet average, particularly affecting bushes, ball joints, and drop links on the 3.0-litre models between 60-80k miles. The raised ride height and soft suspension tuning for comfort contributes to accelerated wear of rubber components and suspension joints.
What happens if ignoredWorn suspension components reduce vehicle stability and handling, particularly in emergency manoeuvres. Severely worn ball joints can separate causing wheel collapse and loss of control. Typical replacement costs for a full corner (shock, springs, bushes, ball joints) range £400-800 per side depending on the specific components required.
Independent garage
£200–£600
Specialist
£250–£750
Main dealer
£350–£1,000
Parts only
£100–£400
Major
CVT transmission failure (BR/BS)
BR, BS2009–201980k–150k miles
The Lineartronic CVT transmission used in fourth and fifth generation Outbacks has documented reliability issues in the US market with over 200 NHTSA complaints mentioning transmission problems. Common failures include torque converter judder, complete transmission failure, and erratic gear selection. The CVT is particularly sensitive to fluid condition and overheating, with many failures occurring after 80,000 miles despite manufacturer claims of lifetime fluid.
What happens if ignoredCVT transmission failure typically requires complete unit replacement as internal components cannot be economically rebuilt. Replacement costs range £3000-5000 for a remanufactured unit plus fitting. Some failures occur suddenly without warning, leaving the vehicle immobilised. The car should not be driven if transmission slipping or juddering is present.
Independent garage
£3,000–£4,500
Specialist
£3,500–£5,000
Main dealer
£4,500–£6,500
Parts only
£2,500–£4,000
Major
Emissions system failure (BR/BS 2.5 Petrol)
BR, BS2.52009–201980k–150k miles
Failures occur at These failures typically manifest after 80,000 miles and are often caused by catalytic converter degradation, faulty oxygen sensors, or carbon buildup in the intake system.
What happens if ignoredEmissions failures will cause MOT test failure and prevent road use. Catalytic converter replacement costs £600-1200 depending on whether front or rear cat is affected. Oxygen sensor replacement costs £150-300 per sensor. Neglected emissions issues can damage expensive catalytic converters and lead to engine damage from incorrect air-fuel mixtures.
Independent garage
£150–£1,200
Specialist
£200–£1,400
Main dealer
£300–£1,800
Parts only
£80–£800

1 more known issues tracked

Including wear items, electrical niggles, and generation-specific problems. Check a specific car to see which issues apply to its age and mileage.

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MOT failure hotspots

Based on DVSA MOT test data. These are the items where the Subaru Outback fails at a significantly higher rate than the average car.

Coil springs broken
Suspension · 100-120k miles
MOT failure rate: 41x the fleet average
Sample: 407 tests
Transmission joint, belt or chain worn
Bodywork · 80-100k miles
MOT failure rate: 20x the fleet average
Sample: 764 tests
Emissions failure
Exhaust & Emissions · 150k+ miles
MOT failure rate: 18x the fleet average
Sample: 760 tests
Headlight fault
Lights & Electrics · 40-60k miles
MOT failure rate: 12x the fleet average
Sample: 272 tests
Suspension component damaged or corroded
Suspension · 150k+ miles
MOT failure rate: 11x the fleet average
Sample: 1,143 tests
ABS fault
Brakes · 150k+ miles
MOT failure rate: 11x the fleet average
Sample: 1,322 tests

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Related

Subaru Outback reliability FAQs

What are the most common problems with the Subaru Outback?

The Subaru Outback has 5 known issues across 2 severity levels. The most serious are: Subframe and suspension mounting point corrosion (BL/BR/BS).

Is the Subaru Outback reliable?

The Subaru Outback has 1 dangerous and 4 major known issues. Most can be avoided with a thorough pre-purchase check and full service history.

How much does it cost to fix Subaru Outback problems?

Repair costs range widely. The most significant issue (Subframe and suspension mounting point corrosion (BL/BR/BS)) costs £800–£2,000 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.

Which Subaru Outback generation is most reliable?

The BP (1998–2003) has the fewest dangerous issues (0). However, condition and service history matter more than generation — a well-maintained earlier car can be more reliable than a neglected newer one.