The bulletproof luxury crossover that started it all
The car that essentially invented the luxury crossover SUV segment when it launched in 1998, offering car-like comfort and refinement in a raised body long before rivals caught on. It appeals to comfort-focused buyers who want Toyota reliability wrapped in a premium package, often chosen by retirees and professionals stepping down from larger SUVs. It competes with the BMW X3 and Volvo XC60 of its era.
We track 5 known issues across the Lexus Rx300 range, including 2 rated as safety-critical. Knowing which variants and configurations to approach with caution can save you from expensive surprises after purchase.
Found a Lexus Rx300? Enter the reg to see which of our 5 known issues apply to that exact car, plus full MOT history and mileage checks.
XU10 (1997–2008) — Engine options included the 3.0L V6. Our database flags 5 known issues on this generation, 2 of which are rated as safety-critical. The most significant concern is Rear subframe structural corrosion (£800–£2,000 to address).
The rear subframe assembly on first-generation RX300s suffers from internal corrosion that compromises structural integrity. The subframe carries the rear suspension mounting points and differential, making failure a direct safety risk. Later Toyota SUVs use different subframe materials and coatings that are not subject to this failure pattern.
Subframe failure can cause sudden loss of rear suspension geometry or differential mounting, leading to loss of vehicle control. Structural welding repair typically costs £800-£1500 if caught early, but advanced corrosion may require subframe replacement costing £2000-£4000. The vehicle is not safe to drive if structural integrity is compromised.
Inspect the wheel arches, sills, jacking points and door bottoms carefully. Press gently on sills to check for soft spots. Look underneath for corrosion on structural components. Check the MOT history for corrosion-related advisories or failures.
The RX300 suffers from severe corrosion around suspension mounting areas, with MOT failures occurring at 38 times the fleet average for suspension component damage or corrosion. This affects the structural areas within 30cm of suspension mounting points, compromising the vehicle's ability to safely support suspension loads. The issue appears across all mileage ranges but becomes critical above 120,000 miles, suggesting a fundamental design weakness in corrosion protection around these critical areas.
Failure of suspension mounting areas can cause sudden collapse of a corner of the vehicle or complete loss of suspension control, creating an immediate crash risk. Professional structural assessment and welding typically costs £600-£1500 per corner affected, but advanced corrosion may require replacement of entire sections. The vehicle should not be driven if structural suspension mounting integrity is compromised.
Inspect the wheel arches, sills, jacking points and door bottoms carefully. Press gently on sills to check for soft spots. Look underneath for corrosion on structural components. Check the MOT history for corrosion-related advisories or failures.
The hydraulic power steering system on the RX300 experiences fluid leaks and pump failures at 34.7 times the fleet average, particularly between 80,000-100,000 miles. The system uses a belt-driven pump feeding a steering rack with high-pressure lines that commonly develop leaks. Failure typically starts with fluid loss from pump seals or high-pressure lines, progressing to complete pump failure if driven without adequate fluid.
Complete power steering failure makes the vehicle difficult and dangerous to manoeuvre, particularly during parking or emergency situations. Pump replacement typically costs £300-£800, while rack replacement can reach £800-£1500. Continuing to drive with low fluid will destroy the pump and potentially damage the steering rack.
During the test drive, check the steering for excessive play, vibration or pulling to one side. Listen for groaning or whining when turning the wheel at low speed. Power steering fluid level and condition should be checked on hydraulic systems.
The RX300 suffers from handbrake system deterioration, with MOT failures for inadequate parking brake efficiency occurring at 30 times the fleet average. The system uses rear brake shoes within the disc brake assembly, operated by cables and levers. Failures typically result from cable stretching, adjuster seizure, or contamination of the brake shoe mechanism, becoming critical above 80,000 miles where operating environment and component age combine.
Inadequate handbrake efficiency creates a safety risk when parking on slopes and will cause MOT failure. Complete handbrake system overhaul typically costs £200-£500, including cable replacement, shoe adjustment, and mechanism cleaning. Seized mechanisms can cause brake drag, leading to premature disc wear and potential overheating.
Check brake disc condition for lipping or scoring. Test braking at moderate speed for pulling to one side or vibration through the steering wheel. Review MOT advisories for brake-related items.
The RX300 experiences accelerated wear of suspension bushes and joint components, with MOT failures occurring at 8.6 times the fleet average. This affects ball joints, control arm bushes, and anti-roll bar links across all mileage ranges. The issue is compounded by deterioration of rubber dust covers at 8.9 times the fleet average, allowing dirt and moisture to accelerate joint wear. While not immediately dangerous, worn suspension components affect handling precision and tyre wear patterns.
Worn suspension bushes cause poor handling, increased tyre wear, and knocking noises over bumps. Complete failure of ball joints can cause loss of steering control. Individual bush or joint replacement typically costs £80-£200 per corner, while comprehensive suspension refresh can reach £800-£1500. The vehicle remains safe to drive with minor bush wear but should be monitored closely.
Listen for knocking, clunking or rattling over bumps during the test drive. Inspect the underside for corroded or cracked suspension components. Check the MOT history for suspension-related advisories, which often predict future failures.
For the full breakdown of all 5 tracked issues with repair costs, see the Lexus Rx300 common problems page.
Based on 26k real DVSA MOT tests, the Lexus Rx300 fails more often than average on several items. The biggest outlier is fluid leak at 96x the fleet average, followed by parking brake efficiency below minimum requirement (52x).
When viewing a specific car, check its MOT history for recurring advisories in these categories. See the full Lexus Rx300 MOT failure breakdown for data at every mileage point.
Routine servicing (oil and filter change every 10k miles) typically costs £80–£120 at an independent garage.
The bigger-ticket items to budget for include timing belt and water pump (£400–£600).
See the full Lexus Rx300 service schedule for every interval and cost breakdown.
The Lexus Rx300 has some well-documented weak points, including 2 safety-critical issues that demand careful checking. The right example, properly maintained, can still be a sound purchase — but cutting corners on the pre-purchase inspection is not advisable. The 2001-2003 models are the best, benefiting from improved transmissions and larger oil return holes that prevent the sludging issues seen in earlier cars. The 2003 model year is considered the most refined version of the first generation. Avoid 1999-2000 cars unless oil change history is immaculate.
Before committing, check the car's full MOT history, verify the service record is complete, and if possible arrange a specialist inspection. Enter any registration into our free report to see the complete picture.
Get Car Wise maintains a database of known mechanical issues for every popular car on UK roads, tracking the faults that owners, specialists and DVSA data reveal.
When you run a report on a specific Lexus Rx300, we cross-reference the exact variant, engine and age against our database of 5 known issues. Combined with full MOT history analysis, mileage verification and DVLA data, you get a complete picture before viewing.
Enter the registration for MOT history, mileage verification, known faults for that exact variant, and a Get Car Wise Score.
This guide was compiled from independent expert reviews, DVSA MOT data, specialist workshops and our own database of 5 known Lexus Rx300 issues. We are not affiliated with any source listed.