Transmission started to slip. Transmission fluid (system flush)change per dealer recommendation problem continued. Dealer refunded charges. Transmission needed replacement. Vehicle is front wheel drive and a factory reconditioned transmission was installed for under $4k. Cheaper then purchasing a new vehicle or a used for the same price. Knowing my vehicles condition it just made more scense to invest in the transmission.
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Newest reported Lexus RX300 problems
The front suspension might make noise when going over bumps or rough roads. The support bushing for the suspension commonly needs to be replaced to correct this concern.
Debris can get into the idle air control valve. This will restrict the air flow into the engine, causing idle speed and/or stalling when cold. The valve can be cleaned or replaced to correct this concern.
Sludge can build up in the engine because Lexus did not recommend frequent enough oil changes. Lexus will sometimes offer a discount on cleaning the engine if necessary. Owners who changed their oil every 3,000 miles did not experience these problems. This sludge build up can lead to excessive oil consumption.