IsItAGoodCar
Reliability Guide

Common Problems with the
2018–2020 Isuzu D-Max (Mk2)

We've identified 2 known issues that can affect the 2018–2020 Isuzu D-Max (Mk2). None are considered critical, but they're worth knowing about before you buy.

2
Known Issues
0
Serious
1
Moderate
1
Minor

All Known Issues

DPF Regeneration Issues

ModerateEngine

The DPF system on both the 2.5 and 1.9 can fail to clear during short journeys, leading to oil dilution.

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

DPF warning light, Rising oil level on the dipstick, Reduced fuel economy

What to Inspect:
  • Check the oil level; if it's significantly above the "full" mark, the oil is likely diluted with fuel
Verified by IsItAGoodCar Research Team

Chassis Surface Rust

MinorSuspension & Chassis

Factory undersealing was sparse. While not usually terminal on this generation yet, surface rust is very common.

Est. Repair Cost: £200–£600 (Cleaning & Sealing)
Warning Signs:

Visible orange oxidation on chassis rails and suspension components

What to Inspect:
  • Inspect the rear section of the chassis where mud accumulates
Verified by IsItAGoodCar Research Team

Buying Tips for 2018–2020 Isuzu D-Max (Mk2)

  • ✓On the 2.5-litre twin-turbo models, check the service history carefully; neglected oil changes can lead to premature turbo failure.
  • ✓Inspect the chassis and undercarriage for severe rust or off-road impact damage; they are frequently used in harsh agricultural environments.
  • ✓Test the clutch on manual models; heavy towing will drastically shorten the life of the clutch and dual-mass flywheel.
  • ✓Check the DPF (Diesel Particulate Filter) status; vehicles used only for short trips around a farm will frequently block the filter.
  • ✓Verify the engagement of the 4WD system; the electronic actuator on the transfer box can fail if rarely used.
  • ✓Look for heavy wear on the interior plastics and driver's seat bolster, typical of a working vehicle.
2012–2017
Check a 2018–2020 Isuzu D-Max (Mk2) by Registration