Used car guide

1999 Jeep Wrangler: common problems and what to check

What gets flagged at MOT on 1999 Jeep Wranglers, from 171 tests in 2025, plus known faults and what to look at before you buy one.

Small sample: only 171 of these were MOT tested in 2025, so treat the percentages as rough. The known faults below don't depend on it.

171MOT tests in 2025
55%pass first time (all 1999 cars: 65%)
3,300typical miles a year
37%had suspension flagged

What gets flagged at MOT

The share of 1999 Jeep Wrangler MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Suspension
    37% of testsRough price £120–£400

    At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.

  • Brakes
    34% of testsRough price £150–£350

    At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.

  • Lights and electrics
    33% of testsRough price £10–£80

    At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.

  • Wipers, windscreen and mirrors
    15% of testsRough price £15–£250

    At the viewing: Check for chips in the driver's view, and test the wipers and washers.

  • Exhaust and emissions
    13% of testsRough price £100–£1,200

    At the viewing: Look for black soot in the tailpipe, listen for blowing from the exhaust and check for engine or DPF warning lights.

  • Oil and fluid leaks
    12% of testsRough price £80–£600

    At the viewing: Look under the engine and on the ground where the car is usually parked for fresh oil or fluid.

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Other years

YearMOT testsMost flagged
2022365Suspension 17%
2021619Suspension 9%
2020691Tyres 13%
2019639Brakes 15%
2018398Brakes 20%
2017281Brakes 24%
2016300Brakes 26%
2015564Brakes 28%
2014365Brakes 25%
2013260Brakes 28%
2012181Brakes 27%
2011120Brakes 29%
2010135Brakes 39%
2009218Brakes 35%
2008144Lights and electrics 37%
2007189Lights and electrics 33%
2006125Suspension 36%
2004135Suspension 37%
2003149Suspension 42%
2002127Suspension 42%
2001185Brakes 35%
2000166Suspension 42%
1998260Suspension 40%
1997241Suspension 41%

Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 1999 Jeep Wranglers registered in 1999. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score