IsItAGoodCar

Common Problems with the
2016–2020 Toyota Hilux (AN120)

We've identified 4 known issues that can affect the 2016–2020 Toyota Hilux (AN120). 1 of these are serious faults that could be expensive to repair.

4
Known Issues
1
Serious
3
Moderate
0
Minor

The 2016–2020 period has 2 more issues than the Toyota Hilux (AN120) average across all year periods.

All Known Issues

Chassis and Underbody Corrosion

SeriousBodywork & Rust

Road salt and coastal exposure can cause the chassis, rear crossmember and suspension mounts to rust.

Estimated cost: £300–£1,500Affects: 2016–2024

Typical symptoms

  • •Visible rust on chassis
  • •MOT advisories for corrosion
  • •Flaking metal underneath

What to inspect before you buy

  • ✓Inspect the chassis, rear crossmember and suspension mounts for rust

DPF Clogging & 5th Injector Failure

ModerateExhaust & Emissions

The 5th injector used for DPF regeneration can fail or leak, leading to frequent DPF warnings and reduced power.

Most affected: 2.4 D-4D, 2.8 D-4D

Estimated cost: £400–£900Affects: 2016–2020Often appears around: 40,000–80,000 miles

Typical symptoms

  • •Frequent DPF regeneration
  • •DPF warning light
  • •Loss of fuel economy

What to inspect before you buy

  • ✓Check dealer records for DPF-related software updates or injector replacements

Alternator Failure

ModerateElectrics & Electronics

The alternator can fail, particularly on higher-mileage trucks, leading to battery drain and electrical issues.

Estimated cost: £250–£450Affects: 2016–2024

Typical symptoms

  • •Battery warning light
  • •Dimming headlights
  • •Electrical accessories failing

What to inspect before you buy

  • ✓Check battery voltage with engine running (should be ~14V)
  • ✓Look for battery warning light

Rear Differential Oil Seal Leak

ModerateGearbox & Transmission

The rear differential oil seal at the prop shaft connection can leak, particularly on trucks used for towing.

Estimated cost: £200–£400Affects: 2016–2024

Typical symptoms

  • •Oil dripping from rear differential
  • •Prop shaft area wetness
  • •Rear diff noise

What to inspect before you buy

  • ✓Inspect the rear differential and prop shaft connection for oil leaks

Buying Tips for the 2016 Toyota Hilux (AN120)

  • ✓Check the chassis for rust, especially if used for launching boats or near the coast.
  • ✓Verify if the DPF '5th injector' issue has been addressed or if the DPF recall was completed.
  • ✓Listen for a squeak from the rear leaf springs, which can indicate dry bushes or cracked leaves.
  • ✓Ensure the 4WD system engages and disengages smoothly in both high and low range.
2021–2024 Toyota Hilux (AN120)

Browse 2016–2020 Toyota Hilux (AN120) in our Directory

View MOT history, registration data, and reliability scores for 2016–2020 Toyota Hilux (AN120) vehicles.

View 2016–2020 Directory

Other Toyota Hilux (AN120) Year Periods

2016–20202021–2024

Looking at a specific 2016 Toyota Hilux (AN120)?

Enter the registration number to check its full MOT history, outstanding finance, write-off status, and more.

Free Vehicle Check