Parts for your 2003 Toyota Highlander-Crank angle sensor

2003 Toyota Highlander crank-angle-sensor (crankshaft position sensor)

Yes, the 2003 Toyota Highlander (also known as Kluger in some markets) is fitted with a crank-angle-sensor, more commonly called the crankshaft position sensor (CKP). Toyota’s own technical literature—Highlander/MCU20–25 and ACU20–25 Repair Manual, Engine Control System section—and the Toyota Electronic Parts Catalog both list a CKP for the 2.4L 2AZ-FE four-cylinder and the 3.0L 1MZ-FE V6. Those sources describe the CKP providing the ECU with an NE signal for engine speed and crank angle, used alongside camshaft position inputs for precise fuel and spark control.

This sensor’s entire job is to tell the ECU exactly where the crank is and how fast it’s spinning. That lets the ECU time ignition and injection bang on, helps with quick starts, smooth idle, and decent fuel economy. If the CKP drops out, the ECU loses sync and you’ll usually cop a no-start, random stalling, or rough running that feels like it’s misfiring under load.

It’s not a routine service item, but it’s worth a look during major services—especially on higher-kilometre Highlanders. Oil seepage, heat, and aged harnesses can upset the signal. On the 2AZ-FE, the sensor mounts at the front of the engine near the crank pulley/oil pump housing. On the 1MZ-FE V6, it’s mounted at the engine block near the crank reluctor, accessed from the lower front area. If replacement is on the cards, stick with quality OEM or OE-equivalent parts, cheap knock-offs can generate weak or noisy signals that keep the fault light on.

Replacement is straightforward for a competent DIYer: disconnect the battery, unplug the connector, remove the single retaining bolt, and draw the sensor straight out. Lightly oil the new O-ring, seat the sensor squarely, and tighten the bolt to factory spec. Clear any fault codes and confirm a clean crank signal with a scan tool. No special programming or relearn is typically needed on this model—if it’s fitted correctly, it’ll just work.

• Common symptoms: hard starting or no-start, stalling when hot, uneven idle, poor power, and fault codes P0335–P0339.
• Maintenance tip: keep an eye out for oil leaks and brittle wiring at the sensor plug, addressing those early can save the sensor.
• Service advice: if the ECU has logged P0335 and basic checks pass, test the CKP’s resistance/signal per the Toyota Repair Manual before replacing.

Popular questions about the 2003 Toyota Highlander crank-angle-sensor

Where is the crank-angle-sensor located on a 2003 Highlander?
On the 2.4L 2AZ-FE it’s mounted at the front of the engine near the crank pulley/oil pump area. On the 3.0L 1MZ-FE V6 it’s fitted to the engine block by the crankshaft reluctor at the lower front of the engine. Access is from underneath or through the wheel well depending on tools and lift height.

What fault codes and symptoms point to a bad CKP?
Typical codes are P0335–P0339. Drivers may notice long crank/no-start, sudden stalling (especially when hot), rough idle, misfire-like hesitation, or poor fuel economy. Always check the connector and wiring before condemning the sensor.

Does a new crank-angle-sensor need programming?
No special programming is normally required on the 2003 Highlander. After installation, clear fault codes, ensure good battery voltage, and verify stable rpm reading on a scan tool. If issues persist, inspect the harness and confirm the correct part has been used.