Three problems related to engine exhaust system have been reported for the 1999 Lexus RX300. The most recently reported issues are listed below.
Tl the contact owns a 1999 Lexus Rx300. While driving approximately 30 mph, the rpms suddenly increased and the vehicle accelerated to speeds above 85 mph. During the incident, flames were seen coming from the exhaust. The contact sustained a neck injury, which required medical attention. A police report was not filed. The vehicle was taken to an independent mechanic who indicated that the flames created a hole in the catalytic converter and the oxygen sensor was faulty. The vehicle was not repaired. The manufacturer and local dealer (o'brien Lexus in bellevue wa) were notified. The VIN was not available. The failure mileage was 170,000.
Took 1999 Lexus RX 300 in for regular service at 39,000 miles, and asked dealer to check engine noise. Dealer found cracked exhaust manifold and split exhaust pipe coming off manifold. Maifold replaced under extended warranty plan but split exhaust not covered because car was out of original warranty. Dealer carried exhaust manifolds in stock due to frequency of problem. This was a design/manufacturing defect and should have been covered by manufacturer.
Exhaust manifold on right side of engine cracked, which resulated in replacement of the manifold and 2 sensor at owners expense. The part cracked at 71,000 miles and Lexus would not reimburse repair because the car was out of warranty. Exhaust manifolds should not crack at 71,000 miles, if ever. Dt.