IsItAGoodCar

Common Problems with the
2018–2021 Mazda 6 (GL)

We've identified 3 known issues that can affect the 2018–2021 Mazda 6 (GL). 1 of these are serious faults that could be expensive to repair.

3
Known Issues
1
Serious
1
Moderate
1
Minor

The 2018–2021 period has 1 more issue than the Mazda 6 (GL) average across all year periods.

All Known Issues

i-ELOOP Capacitor Failure

SeriousElectrics & Electronics

The energy recovery capacitor can fail, which disables the i-stop system and triggers a dashboard warning.

Estimated cost: £800–£1,200Affects: 2018–2023

Typical symptoms

  • •i-ELOOP warning message
  • •Battery not charging correctly
  • •i-stop unavailable

What to inspect before you buy

  • ✓Check for charging system warnings on the dashboard

2.2 SkyActiv-D EGR / DPF Problems

ModerateExhaust & Emissions

Later diesels still clog the EGR and DPF if used for short trips, bringing limp mode and costly forced-regeneration visits.

Estimated cost: £300–£1,200Affects: 2018–2021

Typical symptoms

  • •DPF warning lights
  • •Limp mode
  • •Repeated regeneration attempts

What to inspect before you buy

  • ✓Ask about journey profile and whether the car has needed forced regenerations

Boot Seal Water Ingress

MinorBodywork & Rust

Water can creep past rear lamp seals or boot-area vents, leaving a damp spare-wheel well and occasional condensation issues.

Estimated cost: £0–£200Affects: 2018–2023

Typical symptoms

  • •Condensation in boot area
  • •Wet boot floor
  • •Musty smell after rain

What to inspect before you buy

  • ✓Lift the boot floor and feel around the spare-wheel well and side trims

Buying Tips for the 2018 Mazda 6 (GL)

  • ✓Late 2.0 and 2.5 petrols are the safest buys; treat any 2.2 diesel as a specialist purchase.
  • ✓Check the 360 camera, parking sensors and electric seat functions on high-spec GT Sport Tech cars.
  • ✓Inspect the boot floor and rear lamp area for signs of past water ingress.
2022–2023 Mazda 6 (GL)

Browse 2018–2021 Mazda 6 (GL) in our Directory

View MOT history, registration data, and reliability scores for 2018–2021 Mazda 6 (GL) vehicles.

View 2018–2021 Directory

Other Mazda 6 (GL) Year Periods

2018–20212022–2023

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