Lexus RX III (XU30) (2003 – 2009)

Reliability score : 8.8/10

The Lexus RX (XU30), corresponding to the second generation of the model (although sometimes mistakenly referred to as the 3rd depending on the market or the inclusion of the Toyota Harrier), is an absolute pioneer in the premium SUV segment. It made automotive history by introducing the RX 400h in 2005, the world's very first luxury hybrid SUV. Based on the Toyota K platform, it prioritizes cushioned comfort, silent operation, and exemplary finish over sportiness. The RX 400h combines a 3.3L gasoline V6 with two electric motors (E-Four system) to offer V8 performance with 4-cylinder fuel consumption. A slight facelift took place in 2007, notably introducing the RX 350 to replace the RX 300 in Europe. Overall rating: A monument of reliability, particularly in the hybrid version, which ages

✅ Strengths

Exceptional reliability of the hybrid system (HSD) and V6 engines
Masterful ride comfort and very high-level soundproofing
Assembly quality and aging of materials (excluding dashboard)
Excellent quality Mark Levinson audio system
Reasonable maintenance cost for a luxury SUV (especially the hybrid with no accessory belts, conventional alternator, or starter)

⚠️ Weaknesses

Chronic cracking of the dashboard covering (XU30 disease)
Air suspension (if equipped) very expensive to replace in case of airbag leaks
Infotainment system and GPS totally obsolete today
Clumsy road handling, significant body roll (no sporty vocation)
High fuel consumption of the 100% combustion versions (RX 300/330/350)

🎯 Verdict

The second-generation Lexus RX (XU30) is one of the most reliable used SUVs in the world, particularly in its RX 400h version. Despite its age, it offers a level of comfort, silence, and refinement that still surpasses many modern vehicles. Purchase is highly recommended, provided you favor an example with a clear maintenance history. For the RX 400h, plan a precautionary budget for the high-voltage battery if it is original. Avoid models equipped with air suspension if possible to limit maintenance costs, and inspect the condition of the dashboard before purchase.

Common issues

Dégradation de la batterie hybride (pack ou modules) High

🔧 150 000 – 250 000 km

💶 1 500 – 3 000 € (pour reconditionnement/modules, plus pour un pack neuf)

Vérifier l'historique d'entretien et l'état de la batterie via un diagnostic spécialisé.

Défaillance de l'actionneur ABS / accumulateur de freinage High

🔧 100 000 – 200 000 km

💶 1 000 – 2 500 €

Attention aux voyants ABS/VSC ou à une pédale de frein dure; c'est une panne coûteuse.

Panne de la pompe à eau du circuit de refroidissement de l'onduleur Medium

🔧 120 000 – 180 000 km

💶 300 – 700 €

Une défaillance peut endommager l'onduleur; vérifier son bon fonctionnement.

Défaillance des capteurs d'oxygène (sonde lambda) Low

🔧 150 000 – 250 000 km

💶 150 – 400 € par capteur

Peut entraîner une surconsommation ou un voyant moteur; facile à diagnostiquer.

Estimated maintenance costs

Oil change	£80 – 150
Timing chain	£1,200 – 2,500 (replacement very rare, if failure)
Complete brakes	£280 – 600
Estimated annual budget	£650 – 1,300

Indicative estimates (independent garage, UK market). Prices vary by region and year.