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Hyundai I800 Problems & Known Issues

The most common Hyundai I800 problems ranked by severity — what to watch for, what it costs to fix, and what happens if you ignore it.

Generations

H-1 — First Generation
2008–2021
2.5 CRDi

Top issues to watch for

The most serious Hyundai I800 problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.

Major
Transmission shaft bearing excessive wear
H-12008–202180k–150k miles
The driveshaft intermediate bearing or CV joint bearings show excessive wear leading to MOT failures. This affects the 2.5 CRDi variant at significantly higher rates than the national fleet average, particularly from 80,000 miles onwards. The issue appears to be worsening over time according to MOT trend data. Commercial vehicle loading and frequent stop-start use may accelerate bearing wear on this model.
What happens if ignoredWorn driveshaft bearings will eventually fail completely, potentially leaving the vehicle immobilised. CV joint failure can cause loss of drive to one wheel. Repair typically involves replacement of the complete driveshaft assembly. The vehicle remains driveable in most cases until repair but should not be driven if severe play is detected.
Independent garage
£200–£400
Specialist
£300–£500
Main dealer
£400–£700
Parts only
£120–£250
Major
Handbrake adjustment and efficiency issues
H-12008–202120k–150k miles
The handbrake system shows multiple failure modes including insufficient efficiency, excessive lever travel, and one-side inoperative conditions. MOT data shows this model fails at significantly higher rates than average across all mileage bands. The cable-operated rear drum brake setup appears prone to adjustment issues and uneven operation, particularly problematic on a commercial vehicle requiring reliable parking brake performance.
What happens if ignoredIneffective handbrake creates serious safety risks particularly for commercial vehicles that may be parked on gradients while loaded. The vehicle will fail its MOT test and should not be driven until the handbrake system is properly adjusted or repaired. Seized brake components can cause uneven tyre wear and handling problems.
Independent garage
£100–£250
Specialist
£120–£300
Main dealer
£200–£450
Parts only
£40–£120
Major
Service brake pedal travel issues
H-12008–202140k–150k miles
The brake pedal shows insufficient reserve travel indicating adjustment problems or air in the hydraulic system. This model fails MOT tests at significantly higher rates than the national average for this defect. The issue typically indicates worn brake pads, faulty brake adjusters, or hydraulic system problems that prevent the brakes from returning to their correct position after use.
What happens if ignoredExcessive brake pedal travel reduces braking effectiveness and increases stopping distances. This creates serious safety risks particularly on a commercial vehicle that may be heavily loaded. The vehicle will fail MOT testing and requires immediate brake system inspection and repair before further use.
Independent garage
£150–£400
Specialist
£200–£500
Main dealer
£300–£700
Parts only
£50–£200
Minor
Door operation and closure problems
H-12008–202160k–150k miles
Door mechanisms fail to operate correctly, preventing doors from opening using the handle or closing properly. This commercial vehicle shows failure rates significantly above the national average across all mileage bands from 60,000 miles. The issue affects both sliding side doors and conventional hinged doors. Commercial use with frequent loading may accelerate wear of door mechanisms and handles.
What happens if ignoredFaulty doors may not latch securely creating a safety risk while driving. Doors that will not open may prevent emergency exit or access to cargo areas. Complete door mechanism replacement is typically required rather than repair of individual components.
Independent garage
£150–£350
Specialist
£200–£400
Main dealer
£300–£600
Parts only
£80–£200

1 more known issues tracked

Including wear items, electrical niggles, and generation-specific problems. Check a specific car to see which issues apply to its age and mileage.

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MOT failure hotspots

Based on DVSA MOT test data. These are the items where the Hyundai I800 fails at a significantly higher rate than the average car.

Headlight fault
Lights & Electrics · 20-40k miles
MOT failure rate: 34x the fleet average
Sample: 2,558 tests
Body panel damage
Bodywork · 100-120k miles
MOT failure rate: 33x the fleet average
Sample: 3,010 tests
Transmission shaft bearing worn
Bodywork · 80-100k miles
MOT failure rate: 16x the fleet average
Sample: 4,386 tests
Parking brake inoperative on one side
Brakes · 20-40k miles
MOT failure rate: 9.4x the fleet average
Sample: 4,398 tests
Steering rack wear
Steering · 20-40k miles
MOT failure rate: 9.1x the fleet average
Sample: 5,883 tests
Seat mounting fault
Seatbelts & Airbags · 60-80k miles
MOT failure rate: 8.7x the fleet average
Sample: 8,869 tests

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Related

Hyundai I800 reliability FAQs

What are the most common problems with the Hyundai I800?

The Hyundai I800 has 5 known issues across 2 severity levels. The most common problems relate to Transmission shaft bearing excessive wear and Handbrake adjustment and efficiency issues.

Is the Hyundai I800 reliable?

The Hyundai I800 has 0 dangerous and 3 major known issues. No dangerous issues are tracked, which is a positive sign.

How much does it cost to fix Hyundai I800 problems?

Repair costs range widely. The most significant issue (Transmission shaft bearing excessive wear) costs £200–£400 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.