Lexus RX300 Engine Crankshaft Position Sensor Guide (1999-2003)
Solve stalling, no-start, and rough idling issues by understanding this critical engine sensor.
- A failing crankshaft sensor is a very common cause of stalling and no-start issues on the 1999-2003 RX300.
- Denso is the Original Equipment Manufacturer (OEM) and is the most highly recommended brand for reliability.
- The diagnostic trouble code P0335 almost always points to a problem with this sensor or its wiring.
- This is a critical part; do not drive the vehicle if it is stalling unpredictably.
Is Your RX300 Stalling or Refusing to Start?
A common point of failure on the 1999-2003 Lexus RX300 that leads to stalling or a 'crank-no-start' condition is the crankshaft position sensor. This sensor often fails due to heat and exposure to engine oil leaks over time. When it fails, it can leave you stranded. Symptoms often appear when the engine is warm, such as stalling at a stoplight, and the vehicle may not restart until it has cooled down.
🎬 Watch: Learn more about common crankshaft sensor symptoms and causes.Critical Component Warning
A failed crankshaft position sensor will prevent the engine from running. It is not a part where you should compromise on quality. A cheap, unreliable sensor can fail without warning, leaving you in a dangerous situation.
Choosing the Right Aftermarket Sensor
For many electronic parts on a Lexus, the original equipment manufacturer (OEM) is Denso. This means the Denso-branded aftermarket sensor is often the exact same part as the one sold at a Lexus dealership, just in a different box. Given its critical function, choosing a high-quality replacement is essential.
- Top Tier (Recommended): Denso. As the OEM supplier, their quality and reliability are proven. This is the safest choice for a direct replacement that will perform like the original.
- Mid Tier: Brands like Standard Ignition (SMP), Delphi, and Holstein offer sensors that are generally considered reliable alternatives. They are established names in the aftermarket industry.
- Value Tier: While brands like Dorman, Walker, and other lower-priced options are available, they are often not recommended for critical sensors like this one by vehicle owners in forums. The risk of premature failure can outweigh the initial cost savings.
Pro Tip: When replacing the sensor, inspect the wiring connector for any damage, corrosion, or oil contamination. A bad connection can mimic the symptoms of a failed sensor.
Cost of Replacing the Crankshaft Position Sensor
| Item | Estimated Cost |
|---|---|
| New OEM (Lexus/Denso) Part | $75 - $120 |
| New Aftermarket Part | $27 - $88 |
| Shop Labor | $73 - $140 |
| Total Professional Replacement | $188 - $222 |
Frequently Asked Questions
Where is the crankshaft position sensor located on the RX300?
The sensor is located on the lower front section of the engine block, near the main crankshaft pulley (harmonic balancer). It is mounted just behind the right-side engine mount and above the oil pan. Access requires removing the passenger-side splash shield.
Can I replace this sensor myself?
Yes, this is a feasible DIY job for someone with basic mechanical skills. The sensor is held by a single 10mm bolt, but access can be tight due to the engine mount and other components. You will need to safely raise the front of the vehicle to get access from underneath. The estimated time is about 1 to 1.5 hours.
🎬 Watch this walkthrough of the sensor replacement on a similar engine.What happens if I ignore a failing crankshaft sensor?
Ignoring the symptoms is not recommended. The problem will progress from intermittent stalling or hard starting to a complete no-start condition, leaving you stranded. It can also cause poor fuel economy and rough engine performance.
Is there a recall for the crankshaft position sensor on the 1999-2003 RX300?
No, there are no specific recalls from Lexus or the NHTSA for the crankshaft position sensor on this vehicle. There have been recalls on much newer Lexus models for different issues, but none apply to this part on the first-generation RX300.
Helpful Videos
Technical Specifications
OEM Part Numbers: 90919-05056 90080-19009 90919-05012
This is a Magnetic Resistance Element (MRE) type sensor with a 2-pin, oval-shaped female plug connector.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Lexus RX300: