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

The 2018 period has 2 more issues than the Subaru Outback Mk5 (BS) average across all year periods.

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.

Estimated cost: £800–£1,800Affects: 2015–2020Often appears around: 70,000–100,000 miles

Typical symptoms

  • •Flashing transmission warnings
  • •Jerky engagement
  • •Hesitation from standstill

What to inspect before you buy

  • ✓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

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.

Estimated cost: £250–£550Affects: 2015–2020Often appears around: 50,000+ miles

Typical symptoms

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

What to inspect before you buy

  • ✓Inspect bushings for visible tearing
  • ✓Check tyre shoulders for feathering
  • ✓Listen for front-end clonks over broken tarmac

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.

Most affected: 2.0D diesel

Estimated cost: £300–£1,500Affects: 2015–2018

Typical symptoms

  • •Frequent regeneration
  • •DPF warning light
  • •Reduced power

What to inspect before you buy

  • ✓Ask about the car’s typical use
  • ✓Check for recent DPF cleaning or replacement
  • ✓Look for soot-related faults on a diagnostic scan

Buying Tips for the 2018 Subaru Outback Mk5 (BS)

  • ✓Ask for evidence of CVT fluid servicing
  • ✓Check the DPF status on diesel models
  • ✓Test the EyeSight system thoroughly
2016–2017 Subaru Outback Mk5 (BS)2019 Subaru Outback Mk5 (BS)

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Other Subaru Outback Mk5 (BS) Year Periods

20152016–2017201820192020

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