2006 Lexus RX400H 3.3L Hybrid electric · DA56 DLF

The 2006 Lexus RX400h currently holds a valid MOT that was issued on 15 November 2025 at 163,200 miles, but the maintenance trend is not reassuring. The car failed its previous test on 7 November 2025 at 163,186 miles on four separate items, including a parking brake efficiency fault, an SRS airbag warning lamp, a headlamp outage, and a nail in the offside rear tyre. The retest passed just eight days later, yet the tester still flagged a minor exhaust gas leak and severely deteriorated inner CV joint boots on both front driveshafts, along with perished suspension arm ball joint dust covers. These advisories point to deferred underbody and driveline upkeep rather than a thorough repair. The pattern across earlier years shows recurring suspension wear and corrosion, suggesting the car has been kept running but not consistently maintained to a high standard. The mileage progression is broadly typical for a vehicle of this age. Between the July 2023 test at 156,368 miles and the November 2025 test at 163,200 miles, roughly 6,800 miles were covered in just over two years, which is low annual use. The record shows no large gaps or sudden jumps in odometer readings, and the mileage progression appears consistent. However, low mileage alone does not protect a twenty-year-old hybrid drivetrain or its chassis components from age-related deterioration, particularly where rubber bushes, brake lines, and CV boots are concerned. A buyer should focus the physical inspection on the front inner CV joint boots and driveshaft joints, given the repeated severely deteriorated condition noted in November 2025. Any clicking during tight turns or grease splatter around the inner wheel arches would confirm joint wear. The parking brake fault from the November 2025 failure also warrants a close check of the rear braking system, including the handbrake cables, adjusters, and rear calipers, to confirm the efficiency fault was properly rectified rather than masked. The SRS warning lamp that triggered a failure demands a diagnostic scan to retrieve fault codes, as airbag or seatbelt pretensioner faults can be expensive and are safety-critical. The underside and suspension components deserve equal attention. The history shows worn rear brake discs appearing in both 2023 and 2024, corroded rear brake pipes flagged in 2024, and recurring advisories for worn or perished anti-roll bar links, suspension arm bushes, and ball joint dust covers. A thorough inspection of the rear subframe, suspension mounting points, and brake pipe runs for corrosion and fluid seepage is essential. The minor exhaust leak noted in the most recent test should be traced to its source, as exhaust gas leaks on a hybrid can affect oxygen sensor readings and emissions compliance. Overall, the record suggests a vehicle that has been kept on the road rather than proactively maintained, and a detailed mechanical inspection is strongly advised before purchase.