IsItAGoodCar
Reliability Guide

Common Problems with the
2015 Subaru Outback Mk5 (BS)

The launch year for the BS Outback. Early models introduced the new styling and EyeSight system, but the CVT and diesel issues from previous generations carried over.

What changed for 2015

  • •Launch of the BS Outback with more upmarket styling
  • •Introduction of EyeSight driver assist
  • •Retained boxer diesel engine option

Common MOT watch-outs

  • !CVT valve body failure causing jerky progress
  • !Diesel DPF and EGR blockage
  • !Front control arm bushing wear
3
Known Issues
1
Serious
2
Moderate
0
Minor

All Known Issues

Lineartronic CVT Valve Body / Solenoid Failure

SeriousGearbox & Transmission

The BS Outback can develop internal valve body solenoid faults, causing jerky progress, warning lights and expensive dealer recommendations for full transmission replacement.

Est. Repair Cost: £800–£1,800
Warning Signs:

Flashing transmission warnings, Jerky engagement, Hesitation from standstill

What to Inspect:
  • Drive in slow traffic and on a hill start
  • Check all warning lights cycle properly
  • Ask for invoices showing fluid changes or valve body repair
Verified by IsItAGoodCar Research Team

Front Control Arm Bushing Wear

ModerateSuspension & Chassis

Heavy BS Outbacks chew through the front lower arm bushes, which can make the steering feel loose and lead to repeated tyre wear problems.

Est. Repair Cost: £250–£550
Warning Signs:

Loose steering feel, Knocking over rough roads, Uneven front tyre wear

What to Inspect:
  • Inspect bushings for visible tearing
  • Check tyre shoulders for feathering
  • Listen for front-end clonks over broken tarmac
Verified by IsItAGoodCar Research Team

DPF and EGR Blockage

ModerateExhaust & Emissions

Late diesel BS cars often respond badly to repeated short journeys, leading to blocked DPFs, EGR trouble and recurring limp-mode complaints.

Est. Repair Cost: £300–£1,500
Warning Signs:

Frequent regeneration, DPF warning light, Reduced power

What to Inspect:
  • Ask about the car’s typical use
  • Check for recent DPF cleaning or replacement
  • Look for soot-related faults on a diagnostic scan
Verified by IsItAGoodCar Research Team

Buying Tips for 2015 Subaru Outback Mk5 (BS)

  • Drive in slow traffic and on hill starts to test CVT
  • Check the diesel for evidence of long-distance running
  • Inspect the front suspension for bushing wear
2016–2017
Check a 2015 Subaru Outback Mk5 (BS) by Registration