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Lexus Gs300 Problems & Known Issues

The most common Lexus Gs300 problems ranked by severity — what to watch for, what it costs to fix, and what happens if you ignore it.

Generations

S147 — First Generation
1993–2005
3.0 V6
S190 — Second Generation
2005–2012
3.0 V6

Top issues to watch for

The most serious Lexus Gs300 problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.

Dangerous
Subframe mounting point corrosion
S147, S1901993–201260k–200k miles
The rear subframe mounting points on both S147 and S190 generations suffer from corrosion that weakens the load-bearing structure. This affects the areas where the subframe bolts to the main body shell. The problem is progressive and becomes more severe with age and exposure to road salt.
What happens if ignoredComplete subframe detachment can occur without warning, causing total loss of vehicle control and potentially fatal accidents. Structural welding repairs typically cost £800-£2,000 but may not be economically viable on high-mileage examples. The car is unsafe to drive if significant corrosion is present.
Independent garage
£800–£1,500
Specialist
£1,200–£2,000
Main dealer
£1,800–£3,000
Parts only
£200–£500
Major
Suspension component corrosion
S147, S1901993–201240k–200k miles
Suspension arms, links and brackets on the GS300 are prone to corrosion that can weaken the components structurally. MOT data shows this model fails at 5.8x the national fleet average for suspension component corrosion, with failures starting from 40,000 miles. The problem affects both front and rear suspension components and is accelerated by road salt exposure.
What happens if ignoredCorroded suspension components can fracture suddenly, causing loss of vehicle control, wheel detachment, or suspension collapse. Replacement typically involves multiple components due to the interconnected nature of suspension systems. The car should not be driven if severe corrosion is evident.
Independent garage
£400–£800
Specialist
£600–£1,200
Main dealer
£800–£1,600
Parts only
£200–£600
Major
Suspension bush wear
S147, S1901993–201240k–200k miles
The rubber bushes in the suspension arms and anti-roll bar links deteriorate prematurely on the GS300. MOT data shows this model fails at 9.5x the national fleet average for suspension bush wear, making it one of the most common MOT failure points. The problem affects both front and rear suspension and is compounded by the car's weight and age.
What happens if ignoredWorn bushes cause poor handling, increased tyre wear, and excessive road noise. While not immediately dangerous, severely worn bushes can lead to suspension component misalignment and accelerated wear of other parts. MOT failure is certain once wear becomes excessive.
Independent garage
£250–£500
Specialist
£350–£700
Main dealer
£500–£900
Parts only
£100–£300
Major
Electronic Stability Control system malfunction
S1902005–201280k–200k miles
The Electronic Stability Control system on S190 generation GS300s develops faults that trigger the malfunction indicator lamp. MOT data shows this model fails at 13.7x the national fleet average for ESC system malfunctions, typically appearing after 80,000 miles. The most common causes are wheel speed sensor failures, ABS pump issues, or yaw rate sensor problems.
What happens if ignoredESC system failure removes a critical safety system that helps prevent skidding and loss of control. While the car remains drivable, safety in emergency situations is compromised. Diagnosis requires specialist equipment and repair costs vary significantly depending on which component has failed.
Independent garage
£200–£800
Specialist
£300–£1,000
Main dealer
£500–£1,500
Parts only
£100–£600

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 Lexus Gs300 fails at a significantly higher rate than the average car.

Front or rear fog lamp emitted colour, position...
Lights & Electrics · 150k+ miles
MOT failure rate: 28x the fleet average
Sample: 1,336 tests
Headlight fault
Lights & Electrics · 80-100k miles
MOT failure rate: 17x the fleet average
Sample: 770 tests
ABS fault
Brakes · 60-80k miles
MOT failure rate: 17x the fleet average
Sample: 743 tests
Structural corrosion
Bodywork · 150k+ miles
MOT failure rate: 15x the fleet average
Sample: 654 tests
Body panel damage
Wipers & Windscreen · 150k+ miles
MOT failure rate: 15x the fleet average
Sample: 815 tests
Exhaust system damage
Bodywork · 150k+ miles
MOT failure rate: 14x the fleet average
Sample: 963 tests

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Related

Lexus Gs300 reliability FAQs

What are the most common problems with the Lexus Gs300?

The Lexus Gs300 has 5 known issues across 3 severity levels. The most serious are: Subframe mounting point corrosion.

Is the Lexus Gs300 reliable?

The Lexus Gs300 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 Lexus Gs300 problems?

Repair costs range widely. The most significant issue (Subframe mounting point corrosion) costs £800–£1,500 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.

Which Lexus Gs300 generation is most reliable?

The S147 (1993–2005) has the fewest dangerous issues (1). However, condition and service history matter more than generation — a well-maintained earlier car can be more reliable than a neglected newer one.