Lexus service and repair in Sharjah

The cooling system is pressurised cold, held and watched, and the pump is judged at its weep hole rather than by whatever is on the floor. These engines are chain-driven, so the pump is reached from the accessory drive side, and while the belt is off the tensioner and every idler pulley is spun by hand, because a bearing that is dry today is a roadside stop next month. We also look at the coolant itself: a V8 that has been topped up with water instead of the long-life coolant it was built around corrodes quietly from the inside, and it shows in what comes out of the radiator.

Oil leaving a V8 high up travels a long way before it lands, which is how the wrong gasket gets replaced. We clean the area, run the engine to temperature and locate the origin instead of sealing the nearest thing to the stain. These engines are sealed at the cover and the cam towers with a formed-in-place compound rather than a cut gasket, so the repair is a stripping and resealing job that is worth describing to you honestly before you agree to it, rather than halfway through when the front of the engine is already apart.

Height is read corner by corner as live data from the suspension module, then the system is run up and the compressor timed, because a compressor working long and hard is usually a symptom of a leak somewhere else rather than the fault itself. The struts are checked with the car raised, at the bag and at the top seal. Where a compressor has spent months fighting a leaking strut it is generally finished too, and we say that before you pay for one and come back for the other a fortnight later.

Each damper on this system carries a small actuator the car commands, so it is an electrical diagnosis before it is a mechanical one: codes from the suspension module, then each actuator commanded on its own while its current draw is watched. That separates a damper that is never being asked to change from one that is being asked and not answering. A damper that has simply lost its fluid is found the ordinary way, by hand with the wheels hanging. Both faults feel the same over a speed bump and they are nowhere near the same bill.

The inverter has a cooling circuit of its own, with its own electric pump and its own reservoir, quite separate from the engine coolant, and a pump that has stopped or a circuit with air trapped in it will shut the hybrid system down to protect what it is cooling. We read the stored hybrid codes and the inverter coolant temperature in live data, check the level in the correct reservoir rather than the obvious one, and confirm whether the pump is actually running. Where the answer turns out to be inside the transaxle or on the high-voltage side of the car, we say so plainly and tell you where it should go — that is not something to be approximate about.

This is the most regionally specific fault on this page and one of the few with a cheap ending. The pack is cooled by cabin air drawn through an intake near the rear seat, and in this climate that intake, the duct behind it and the fan blades themselves silt up with the fine dust that gets into everything. We look at the intake and the fan, and alongside that we read the battery block voltages and the pack temperatures the module reports, so we can tell you whether this is a cooling problem that cleaning will fix or a pack that is already out of balance and only being exposed by the heat. Those two are told apart by the data, not by how loud the fan is.

Braking on these cars is blended between regeneration and the hydraulic side and managed by an actuator with its own pump and accumulator, so a pedal complaint is read out of the brake module rather than guessed at from the pedal. We check the stored codes, watch accumulator pressure and how long the pump runs to build it, and establish whether what is failing is the actuator itself, a wheel speed signal feeding it, or fluid that has never been changed. It is an expensive assembly and it is also one of the parts most often replaced on suspicion, which is exactly why it is worth being certain first.

Before a speaker is condemned we move channels at the amplifier and see whether the fault follows the channel or stays with the speaker. That takes minutes and settles the argument. The amplifier on these cars sits where heat and damp both collect and is a far more common failure than the drivers in the doors, which is the opposite of where most people start. A head unit that restarts on its own gets supply and ground checked at the module, along with any accessory a previous owner spliced into the wrong feed — in a car of this age that is a more likely story than a module failing by itself.

This is a material failure and not a cleaning problem, and nothing sold in a spray bottle reverses it — a car parked outside here has that surface cooked from above every day of the summer, and certain Lexus interiors of a particular period are much worse for it than others. We will tell you which of the realistic options applies: a replacement panel, a recovered one, or leaving it alone. We will also say whether the crack is at a seam that is going to keep travelling or whether it has stabilised, so the decision is yours on real information rather than on a quote for the largest version of the job.