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.

Known Issues

Serious

Moderate

Minor

The 2018–2020 period has an average number of reported issues compared to other Isuzu D-Max (Mk2) year periods.

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.

Estimated cost: £300–£1,500Affects: 2012–2020

Typical symptoms

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

What to inspect before you buy

✓Check the oil level; if it's significantly above the "full" mark, the oil is likely diluted with fuel

Chassis Surface Rust

MinorSuspension & Chassis

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

Estimated cost: £200–£600 (Cleaning & Sealing)Affects: 2012–2020

Typical symptoms

•Visible orange oxidation on chassis rails and suspension components

What to inspect before you buy

✓Inspect the rear section of the chassis where mud accumulates

Buying Tips for the 2018 Isuzu D-Max (Mk2)

✓Prefer the 1.9L engine (2017+) for ULEZ compliance and slightly simpler turbo setup, though it requires AdBlue.
✓On 2.5L models, listen for any whistling from the turbos, which can indicate impending failure.
✓Check the tailgate and load bed for heavy wear, which indicates a hard working life.

2012–2017 Isuzu D-Max (Mk2)