IsItAGoodCar
Reliability Guide

Common Problems with the
2012 Isuzu D-Max (Mk2)

The second-generation D-Max (RT50) debuted in the UK with a 2.5-litre twin-turbo diesel (163bhp), a robust 3.5-tonne towing capacity, and Utility, Eiger, Yukon, and Utah trim grades across three cab styles.

What changed for 2012

  • •All-new RT50 platform with stiffer high-tensile chassis and unified global D-Max badging
  • •2.5-litre twin-turbocharged diesel engine (4JK1-TCX) producing 163bhp and 400Nm of torque
  • •Class-leading 3.5-tonne braked towing capacity and full one-tonne payload capability
  • •Introduction of Extended Cab with reverse-opening rear suicide doors alongside Single and Double Cabs

Common MOT watch-outs

  • !Chassis surface oxidation and corrosion around the rear cross-members and spare wheel carrier
  • !Imbalanced rear drum brakes or seized handbrake linkages from water and mud ingress on working vehicles
  • !Premature front suspension anti-roll bar drop link and ball joint play from rough farm or site use
3
Known Issues
1
Serious
1
Moderate
1
Minor

All Known Issues

Turbocharger Failure (2.5L)

SeriousEngine

The smaller of the two turbos on the 2.5L engine can suffer from bearing failure, often due to carbon-clogged oil feeds.

Est. Repair Cost: £800–£1,500
Warning Signs:

Whining/whistling noise, Blue smoke, Sudden loss of power

What to Inspect:
  • Evidence of 6,000-8,000 mile oil changes is better than the official long-life intervals
Verified by IsItAGoodCar Research Team

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 2012 Isuzu D-Max (Mk2)

  • Check service history for 12,000-mile oil changes to prevent carbon clogging the twin-turbo oil feed pipes
  • Test the electronic rotary 4WD selector on loose ground to verify smooth transition between 2H, 4H, and 4L
  • Inspect the rear leaf spring packs for broken, cracked, or misaligned leaves caused by overloading
2013–2016
Check a 2012 Isuzu D-Max (Mk2) by Registration