The MOT Files

Known faults, from the test record

Jeep Grand Cherokee common problems

What fails on the Jeep Grand Cherokee at MOT, which parts are behind it, and how each model year compares. From 9,869 DVSA test records.

Data updated

Quick answer

The Jeep Grand Cherokee's most common MOT problems are bulbs and lamps, suspension bushes, parking brake, recorded in 33.5%, 27.1% and 25.6% of failed tests respectively. By model year, 2016 cars pass most often (79.5%) and 2014 cars least (75.5%), though most of that gap is age. Every figure here is what testers recorded, not what owners reported.

A “common problems” list is usually a forum thread: whoever had the worst day writes the longest post. This one is built the other way, from every Jeep Grand Cherokee that took an MOT last year and what the tester wrote down. It cannot see breakdowns, electrical gremlins or a gearbox that hunts, because the test does not check those. What it can see, it sees across 9,869 cars.

By component

What wears out on a Grand Cherokee

Failure items grouped by the part behind them, with the share of failed Jeep Grand Cherokee tests recording each. A part can carry several DVSA wordings; they are listed beneath. One failed test often lists several items, so shares do not sum to 100%.

  1. 1.Bulbs and lamps

    33.5% of failed tests

    Filament bulbs simply expire; the cheapest and most avoidable failure on the test, and one of the most recorded.

    • “A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning” — explained7.7%
    • “A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED” — explained5.9%
    • “An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning” — explained5.5%
    • “A rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps” — explained4.9%

    Across all cars, bulbs and lamps failures climb 15-fold between three and fifteen years, peaking at 15+ years. How long bulbs and lamps last

  2. 2.Suspension bushes

    27.1% of failed tests

    Rubber bushes in arms and links perish and split with age and load; the most recorded suspension item on the test.

    • “A suspension joint dust cover missing or no longer prevents the ingress of dirt etc” — explained9.3%
    • “A suspension pin, bush or joint excessively worn” — explained7.4%
    • “A suspension pin, bush or joint excessively worn” — explained3.9%
    • “A suspension pin, bush or joint excessively worn” — explained2.3%

    Across all cars, suspension bushes failures climb 20-fold between three and fifteen years, peaking at 15+ years. How long suspension bushes last

  3. 3.Parking brake

    25.6% of failed tests

    Cables stretch and seize, rear shoes and adjusters wear; efficiency is measured on the roller tester against the vehicle's weight.

    • “Parking brake efficiency below minimum requirement” — explained6.3%
    • “Parking brake inoperative on one side” — explained6.0%
    • “Parking brake efficiency below minimum requirement” — explained5.3%
    • “Parking brake efficiency less than 50% of the required value” — explained4.3%

  4. 4.Tyres

    18.1% of failed tests

    Tread wears with every mile and sidewalls age and take kerb damage; the legal minimum is 1.6 mm across the central three-quarters.

    • “Tyre tread depth not in accordance with the requirements” — explained10.2%
    • “A tyre seriously damaged” — explained5.0%
    • “A tyre cords visible or damaged” — explained2.9%

    Across all cars, tyres failures run at a similar rate at every age, because they are replaced on a cycle rather than wearing out with the car. How long tyres last

  5. 5.Wiper blades and washers

    13.4% of failed tests

    Rubber blades harden and split within a year or two; washer jets block and pumps fail.

    • “Wiper blade missing or obviously not clearing the windscreen” — explained6.5%
    • “Windscreen washers not working or not providing sufficient fluid to clear the windscreen” — explained4.8%
    • “Windscreen washers not working or not providing sufficient fluid to clear the windscreen” — explained2.1%

    Across all cars, wiper blades and washers failures run at a similar rate at every age, because they are replaced on a cycle rather than wearing out with the car. How long wiper blades and washers last

  6. 6.Brake pads and shoes

    8.5% of failed tests

    Friction material wears with use; the MOT limit is 1.5 mm and a pad that thin is close to metal on metal.

    • “a brake lining or pad worn below 1.5mm” — explained8.5%

    Across all cars, brake pads and shoes failures run at a similar rate at every age, because they are replaced on a cycle rather than wearing out with the car. How long brake pads and shoes last

  7. 7.Suspension arms and mountings

    6.6% of failed tests

    Arms bend on impact and mountings corrode into the body; a corroded mounting is a structural item and fails as one.

    • “The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired” — explained6.6%

  8. 8.Driveshaft gaiters

    6.1% of failed tests

    The rubber boot over each CV joint splits with age and flexing, then throws grease and lets grit destroy the joint.

    • “A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc” — explained6.1%

    Across all cars, driveshaft gaiters failures climb 21-fold between three and fifteen years, peaking at 15+ years. How long driveshaft gaiters last

By registration year

Grand Cherokee problems by year

MOT pass rate for Jeep Grand Cherokee cars by the year they were first registered, from years with at least 1,000 tests. Every car in a row is the same age, so the rate is raw. Neighbouring years differ by a year of wear — a step of a point or two is age. No single step here is large enough to point at a generation change.

201475%
201578%+2.9
201680%+1.2

Last column: change on the previous year, in points. Years registered within the last three years have not yet been tested and are not shown.

Before it fails

What testers warn Grand Cherokee owners about

Advisories are the same parts a year or two earlier. Share of all Jeep Grand Cherokee tests carrying an advisory for each.

Go deeper

The rest of the Grand Cherokee file

Common questions

What are the most common problems with a Jeep Grand Cherokee?
Going by what fails the MOT, bulbs and lamps (recorded in 33.5% of failed tests), suspension bushes (recorded in 27.1% of failed tests), and parking brake (recorded in 25.6% of failed tests). These are the items testers actually record across 9,869 tests, not reports from owners, so they describe what goes wrong at the point where it has to be fixed.
Which Jeep Grand Cherokee year is the most reliable?
By MOT pass rate, Jeep Grand Cherokee cars registered in 2016 do best at 79.5% and 2014 cars do worst at 75.5%. Most of that ordering is simply age — newer cars pass more — so read the year table for steps larger than a couple of points between neighbouring years; those mark a change in the cars rather than the calendar.
Is the Jeep Grand Cherokee reliable?
Adjusted for the age and mileage of the cars tested, the Jeep Grand Cherokee passes 75.4% of MOTs against a national 72.3%. An MOT measures roadworthiness on the day rather than breakdowns or running costs, so this is a reliability measure in the narrow sense: how often the car meets the legal standard, and what stops it.
What should I check when buying a used Jeep Grand Cherokee?
Start with what fails most: bulbs and lamps, suspension bushes, tyres. Then read the car's own MOT history for advisories carried year to year without repair — the model tells you what to expect, the history tells you whether this owner dealt with it.

Analysis built from DVSA data of