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Lexus Is250 Problems & Known Issues

The most common Lexus Is250 problems ranked by severity — what to watch for, what it costs to fix, and what happens if you ignore it.

Generations

XE20 — Second Generation
2005–2013
2.5 V6 4GR-FSE
XE30 — Third Generation
2013–2021
2.5 V6 4GR-FSE

Top issues to watch for

The most serious Lexus Is250 problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.

Major
Emissions system failure leading to MOT failures
XE20, XE302005–202160k–150k miles
The direct injection system sprays fuel directly into the combustion chamber, bypassing the intake valves, so carbon deposits accumulate over time without the cleaning action of fuel. This affects lambda sensor readings, exhaust gas recirculation operation, and overall emissions compliance.
What happens if ignoredFailed MOT test requiring immediate rectification before the car can be driven legally. Carbon cleaning typically costs £300-500, but severe cases may require intake manifold removal and valve cleaning. Lambda sensors and catalytic converters may also need replacement if contaminated, adding significantly to repair costs.
Independent garage
£200–£800
Specialist
£300–£1,000
Main dealer
£500–£1,500
Parts only
£150–£600
Major
Suspension component corrosion and wear
XE20, XE302005–202140k–150k miles
Suspension components including control arms, bushes, and associated hardware suffer from premature corrosion and wear on the IS250. The issue affects multiple mileage bands and becomes progressively worse with age, showing MOT failure rates up to 12.8 times the fleet average. This is particularly problematic for the rear suspension where access for inspection and replacement is more difficult.
What happens if ignoredMOT failure requiring immediate repair. Worn suspension components affect handling, braking stability, and tyre wear. In severe cases, component failure could cause loss of control. Rear suspension work typically requires specialist alignment after repair.
Independent garage
£200–£600
Specialist
£300–£800
Main dealer
£500–£1,200
Parts only
£100–£400
Major
Electronic Stability Control system malfunction
XE20, XE302005–202160k–150k miles
The Electronic Stability Control system shows malfunction indicators at 6.4 times the fleet average rate, particularly affecting higher mileage vehicles. This typically involves wheel speed sensors, ABS pump issues, or control module faults. The ESC system is integrated with ABS, traction control, and brake assist, so failures can affect multiple safety systems simultaneously.
What happens if ignoredMOT failure due to malfunction indicator light. More critically, the vehicle lacks electronic stability assistance which significantly increases accident risk in emergency situations. ABS functionality may also be compromised, affecting braking performance.
Independent garage
£150–£500
Specialist
£200–£600
Main dealer
£300–£800
Parts only
£50–£300
Major
Brake system lag and response issues
XE20, XE302005–202180k–150k miles
Abnormal brake lag affects the IS250 at The issue manifests as delayed brake response or uneven braking between wheels, which can cause the car to pull to one side under braking. This is particularly dangerous as it affects the primary safety system.
What happens if ignoredMOT failure and immediate safety risk. Brake lag increases stopping distances and can cause loss of control, particularly in emergency situations. Seized calipers can lead to brake disc warping, tyre wear, and reduced fuel economy due to drag.
Independent garage
£150–£400
Specialist
£200–£500
Main dealer
£300–£700
Parts only
£80–£250

1 more known issues tracked

Including further major faults, 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 Lexus Is250 fails at a significantly higher rate than the average car.

Emissions failure
Exhaust & Emissions · 60-80k miles
MOT failure rate: 14x the fleet average
Sample: 3,291 tests
Brake lining or pad missing or incorrectly mounted
Brakes · 100-120k miles
MOT failure rate: 14x the fleet average
Sample: 3,840 tests
Anti-roll bar links worn
Suspension · 120-150k miles
MOT failure rate: 13x the fleet average
Sample: 3,970 tests
Reflector defective or damaged by up to 50% of ...
Lights & Electrics · 40-60k miles
MOT failure rate: 11x the fleet average
Sample: 6,032 tests
Headlight fault
Lights & Electrics · 20-40k miles
MOT failure rate: 10x the fleet average
Sample: 1,461 tests
Reflector defective or damaged by more than 50%...
Lights & Electrics · 100-120k miles
MOT failure rate: 9.3x the fleet average
Sample: 5,555 tests

Buying a Lexus Is250?

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Related

Lexus Is250 reliability FAQs

What are the most common problems with the Lexus Is250?

The Lexus Is250 has 5 known issues across 1 severity levels. The most common problems relate to Emissions system failure leading to MOT failures and Suspension component corrosion and wear.

Is the Lexus Is250 reliable?

The Lexus Is250 has 0 dangerous and 5 major known issues. No dangerous issues are tracked, which is a positive sign.

How much does it cost to fix Lexus Is250 problems?

Repair costs range widely. The most significant issue (Emissions system failure leading to MOT failures) costs £200–£800 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.

Which Lexus Is250 generation is most reliable?

The XE20 (2005–2013) has the fewest dangerous issues (0). However, condition and service history matter more than generation — a well-maintained earlier car can be more reliable than a neglected newer one.