Lexus LS (Mk4) Common Problems & Reliability

The fourth-generation Lexus LS (XF40) represents the pinnacle of Japanese automotive engineering from its era, engineered to rival the Mercedes-Benz S-Class and BMW 7 Series with an almost obsessive focus on refinement and isolation. In the UK, it was offered as the V8-powered LS 460 and the phenomenally complex LS 600h—a hybrid behemoth that paired a 5.0-litre V8 with electric motors to provide silent, surge-like acceleration. The cabin is a sanctuary of opulence, featuring exquisitely stitched leather, near-silent cruising acoustics, and, on higher trims, reclining rear seats with massage functions. Driving the LS is a masterclass in effortless wafting. The air suspension glides over road imperfections, completely insulating occupants from the harsh realities of British tarmac. However, this level of isolation means the LS feels detached and boat-like through corners, offering none of the dynamic sharpness found in a Jaguar XJ or a Porsche Panamera. Furthermore, the sheer size of the vehicle can make navigating tight UK city centres and multi-storey car parks a stressful affair, despite the array of parking sensors and cameras. While the LS is vastly more reliable than its European contemporaries, its sheer complexity means that when things do go wrong, they are eye-wateringly expensive to fix. The air suspension struts are a known weak point as the car ages, and replacing a failed unit can easily run into four figures. Similarly, the hydraulic brake actuator on both the 460 and 600h is prone to eventual failure, presenting a massive repair bill. Prospective buyers must demand a fastidious service history and ideally look for a car that has recently had its major suspension and braking components overhauled.