2000 Lexus RX300 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2000 Lexus RX300

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2000 Lexus RX300 Problems

Low Engine RPM or Stalling on Cold Start

The 1998-2003 Lexus RX300 may start and stall, or start and run at very low engine speeds when the engine is cold. 

The issue is a failed or dirty idle air control valve. This valve is mounted under the throttle body, and modulates airflow to the engine under certain conditions. When the valve becomes dirty, or when the valve fails, proper airflow to the engine is not achieved. This results in start and stall, and low RPM.  

To correct the issues, the idle air control valve will need to be tested, and cleaned or replaced. 

To help decrease the frequency of this issue, change the air filter no less than once per year. 

Rough Idle and Backfiring Engine with Check Engine Light

The Lexus RX300 has a known issue with the valves that if left unchecked, will cause burned valves and engine performance issues. 

The engine ‘breathes’ through valves that are pushed open by the camshaft, and closed by springs. When valves are closed, they seal against a valve seat. In this vehicle, the valve seat is too soft, so after the valve contacts it thousands of times, it becomes crushed. Once it is crushed, the valve can no longer make a proper seal, and the valves erode due to extreme temperature (burnt valve).

Symptoms related to this issue:

To repair the burnt valves, the cylinder head must be removed and rebuilt, which is a costly internal engine repair, however, this issue can be prevented through inspection and adjustment of valve clearances every 40,000 miles.

Excessive Oil Consumption

Drivers of the Lexus RX300 may notice excessive oil consumption between oil changes, even to the extent of the engine oil warning light displayed on the multi-function display.

This issue is known to be caused by infrequent oil changes causing engine sludge, or worn piston rings. 

The engine should be cleaned of oil sludge, and if oil consumption remains excessive, the engine may need new piston rings, or other internal components replaced. 

To avoid this issue, change the engine oil and filter every 3,000 miles, and ensure the proper grade of oil is used. 

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2000 Lexus RX300 Reviews

Rated
based on 6 customer reviews
I had 2 Lexus RX300. Bought the first one in 1998. It caught fire in 2000, as I was driving to work (10-mile leisurely drive). Total loss. It had about 15,000 miles. Horrible experience with Lexus as we sorted through that. They eventually gave me a slightly used RX300 demo car which I still have. It has 111,000 miles. Muffler gave up at 70,000; the radio at about 80,000; transmission at 100,00...
would the shift shaft seal keep the car from shifting rears.. mine if stuck in reverse and the shifter hand moves
I had purchased the 2000 RX300 model and only at 65K miles started giving me more issues compared to any other cars that i have driven. Never had any issues on my other cars for at least 98K miles. But this was a big headache for me one problem after the other. 1st of all never in my life will i purchase a Toyota Branded upscaled car like Lexus nor any Toyota branded vehicles. At 65k - Rear M...

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