Generations
WK2 — Fourth Generation (WK2)
2005–2021
3.0 CRD V6, 6.4 HEMI V8
Top issues to watch for
The most serious Jeep Grand Cherokee problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.
Dangerous
Parking brake efficiency failure (WK2)
The parking brake system on WK2 Grand Cherokee shows severe degradation in efficiency, with MOT failures occurring at up to 84.6 times the national fleet average. The system fails to meet minimum legal efficiency requirements, typically falling below the mandatory 16% efficiency on a rolling road test. This appears to be a combination of brake shoe wear, adjuster seizure, and cable stretch in the drum-in-disc rear parking brake setup.
What happens if ignoredA parking brake operating below 16% efficiency is an MOT failure and the vehicle cannot be driven legally on public roads. More critically, the vehicle may not hold securely on slopes, creating a serious safety risk to occupants and other road users. The car could roll away when parked, potentially causing injury or property damage.
Major
Power steering fluid leak and system failure (WK2)
The power steering system on WK2 Grand Cherokee suffers from multiple failure modes including fluid leaks from pump seals, reservoir cap failures, and complete system malfunctions. MOT data shows this model fails power steering tests at 6.4 times the national fleet average, with fluid level failures occurring at 93.4 times the fleet rate. The hydraulic system appears undersized for the vehicle's weight and steering loads, leading to premature component wear.
What happens if ignoredComplete system failure results in heavy, unassisted steering which significantly increases driver effort and reduces safety, particularly during parking manoeuvres and emergency situations. Continued operation with low fluid destroys the pump and potentially damages the steering rack. Pump replacement typically costs £800-1,500 plus labour.
Major
Premature shock absorber failure (WK2)
Shock absorbers on WK2 Grand Cherokee fail prematurely, with MOT data showing failures at 4.5 times the fleet average even on very low mileage vehicles (0-20k miles). The failures typically manifest as severe oil leakage from the damper seals, rendering the shock absorber completely ineffective. This premature failure suggests undersized components or inadequate seal design for the vehicle's weight and suspension loads.
What happens if ignoredFailed shock absorbers severely compromise vehicle stability, braking performance, and tyre life. The car becomes dangerous to drive in emergency manoeuvres or adverse weather conditions. Continued driving damages tyres through irregular contact patches and may cause MOT failure. Replacement typically costs £600-1,200 for a full set including labour.
Major
Electronic stability control malfunction (WK2)
The electronic stability control (ESC) system develops faults that trigger the malfunction indicator light, with MOT failures occurring at The system integrates multiple sensors and control modules to prevent skidding and loss of control. Common failure points include wheel speed sensors, yaw rate sensors, and communication faults between control modules affecting the system's ability to intervene during emergency situations.
What happens if ignoredESC malfunction eliminates crucial safety systems that prevent loss of control during emergency manoeuvres or slippery conditions. The vehicle remains driveable but is significantly less safe, particularly in adverse weather or emergency situations. Diagnosis requires specialist equipment and repair costs vary from £200-800 depending on the specific component failure.
1 more known issues tracked
Including wear items, electrical niggles, and generation-specific problems.
MOT failure hotspots
Based on DVSA MOT test data. These are the items where the Jeep Grand Cherokee fails at a significantly higher rate than the average car.
Light unit fault
Lights & Electrics · 20-40k miles
MOT failure rate: 187x the fleet average
Sample: 4,714 tests
Power steering fault
Steering · 20-40k miles
MOT failure rate: 93x the fleet average
Sample: 5,274 tests
Parking brake efficiency less than 50% of the r...
Brakes · 80-100k miles
MOT failure rate: 85x the fleet average
Sample: 4,231 tests
Parking brake efficiency below minimum requirement
Brakes · 40-60k miles
MOT failure rate: 56x the fleet average
Sample: 9,054 tests
Steering rack wear
Steering · 20-40k miles
MOT failure rate: 12x the fleet average
Sample: 4,305 tests
Tyre wear or damage
Tyres · 100-120k miles
MOT failure rate: 6.5x the fleet average
Sample: 1,355 tests
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Related
Jeep Grand Cherokee reliability FAQs
What are the most common problems with the Jeep Grand Cherokee?
The Jeep Grand Cherokee has 5 known issues across 3 severity levels. The most serious are: Parking brake efficiency failure (WK2).
Is the Jeep Grand Cherokee reliable?
The Jeep Grand Cherokee has 1 dangerous and 3 major known issues. Most can be avoided with a thorough pre-purchase check and full service history.
How much does it cost to fix Jeep Grand Cherokee problems?
Costs vary by issue. Independent garages are typically 30-50% cheaper than main dealers for most repairs.