IsItAGoodCar
Reliability Guide

Common Problems with the
2018 Subaru Outback Mk5 (BS)

Mid-cycle models with improved build quality but still carrying the same CVT and diesel weaknesses. These are often the best value examples if well maintained.

What changed for 2018

  • •Minor equipment upgrades
  • •Revised interior trim options
  • •Improved infotainment system

Common MOT watch-outs

  • !CVT solenoid faults becoming more common
  • !DPF issues on short-trip diesel cars
  • !Front suspension bush 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 2018 Subaru Outback Mk5 (BS)

  • Ask for evidence of CVT fluid servicing
  • Check the DPF status on diesel models
  • Test the EyeSight system thoroughly
2016–20172019
Check a 2018 Subaru Outback Mk5 (BS) by Registration