IsItAGoodCar
Reliability Guide

Common Problems with the
2018 Suzuki Jimny (Gen 4)

The launch year for the Gen 4 Jimny. Early models had the fuel pump impeller recall issue and the door wiring harness recall. These cars also have minimal factory undersealing, making early rust prevention essential.

What changed for 2018

  • •Launch of the Gen 4 Jimny with retro styling
  • •Introduction of 1.5-litre petrol engine
  • •Retained ladder-frame chassis and low-range transfer case

Common MOT watch-outs

  • !Fuel pump failure from defective impeller
  • !Door wiring harness breakage affecting airbag sensors
  • !Chassis corrosion from minimal factory protection
3
Known Issues
2
Serious
1
Moderate
0
Minor

All Known Issues

Fuel Pump Impeller Swelling

SeriousFuel System

A recall was issued for fuel pumps with a defective impeller material that can swell over time, particularly due to ethanol content in modern fuel. This can cause the pump to stop working and the engine to stall without warning.

Est. Repair Cost: £0 (Recall)
Warning Signs:

Engine stalling without warning, Difficulty starting, Fuel pump warning light

What to Inspect:
  • Check with a Suzuki dealer that the fuel pump recall has been completed
  • Verify VIN against recall records on GOV.UK
Verified by IsItAGoodCar Research Team

Door Wiring Harness Wear

SeriousElectrics & Electronics

A recall was issued for door harness wiring that can break from repeated opening and closing of the door. If the wiring breaks, the side impact airbag sensor may fail to operate in an accident.

Est. Repair Cost: £0 (Recall)
Warning Signs:

Side airbag warning light, Door window or mirror intermittently not working, Interior light not triggering when door opens

What to Inspect:
  • Check recall status with a Suzuki dealer
  • Test all door-operated electrical functions
Verified by IsItAGoodCar Research Team

Chassis Corrosion (Lack of Protection)

ModerateBodywork & Rust

The factory underseal is minimal, leading to early surface rust on the ladder frame.

Est. Repair Cost: £300–£600 (Undersealing)
Warning Signs:

Orange surface rust on the frame, Corrosion on bolt heads

What to Inspect:
  • Look under the car at the main frame rails
Verified by IsItAGoodCar Research Team

Buying Tips for 2018 Suzuki Jimny (Gen 4)

  • Verify the fuel pump recall was completed
  • Check the door wiring harness recall status
  • Apply additional undersealing immediately if buying
2019
Check a 2018 Suzuki Jimny (Gen 4) by Registration