Parts for your 2003 Daihatsu Yrv-Crank angle sensor

2003 Daihatsu YRV crank-angle sensor: what it does, where it lives, and how to look after it

Based on the Daihatsu YRV (M200 series) Workshop Manual for the K3-VE and K3-VET engines—Engine Mechanical and EFI/ECM sections—and matching Autodata and Denso EFI references, the 2003 Daihatsu YRV is fitted with a crank-angle sensor (more commonly called a crankshaft position sensor). These sources show a dedicated sensor reading a multi-tooth trigger wheel on the crank, with the signal fed to the ECU for ignition timing and fuel injection control. It’s typically mounted low on the block near the crank pulley or at the transmission bellhousing, depending on variant.

This little sensor is the timekeeper for the YRV’s engine. By tracking crank speed and exact position, it lets the ECU fire the coils and injectors right on cue. Without a clean signal, the engine can be hard to start, stumble, or not run at all. On the K3-VE/K3-VET, it also helps the ECU coordinate with the cam sensor for sequential injection and spark.

It’s not a scheduled replacement item, but it’s smart to give it some attention during servicing:

• Symptoms to watch: long cranks, random stalling, misfires, or a check engine light with codes like P0335/P0336.
• Quick checks under the bonnet: look for oil contamination on the connector, cracked insulation, or a chafed harness near the right-hand engine mount.
• If removing it: disconnect the battery, unplug the connector, then undo the retaining bolt. The sensor has an O-ring—replace it and lightly oil it before refitting. Route the loom exactly as it was to avoid rub-through.
• After replacement: clear fault codes and verify live data (engine RPM) and stable sync on a scan tool. No special relearn is usually required, but confirming stable idle and clean restarts is good practice.

Genuine or quality OEM-equivalent sensors tend to give the most reliable signal quality and long service life. If the YRV does short trips or lives in wet conditions, periodic inspection every major service (say 40,000–60,000 kilometres) helps catch wiring issues early. If there’s oil wicking up the loom, fix the source leak first, as contamination can upset the sensor signal.

Bottom line: the crank-angle sensor on a 2003 Daihatsu YRV is absolutely relevant, factory-fitted, and critical to smooth running. Keep the connector clean, the loom protected, and replace the sensor if it shows its age—your ignition timing and fuel delivery will thank you.

Popular questions

Where is the crank-angle sensor on a 2003 Daihatsu YRV?
On most K3-VE/K3-VET engines it’s mounted low on the engine, reading a toothed wheel on the crank—either near the crank pulley at the front or down at the bellhousing. A torch and a look from underneath often makes it easier to spot the small sensor body and single retaining bolt.

If you’re unsure, follow the wiring from the lower engine harness, the workshop manual’s EFI section illustrations show the exact bracket and routing used on the YRV.

What are the signs the YRV’s crank-angle sensor is failing?
Common signs include hard starting, intermittent stalling, sudden loss of power, or a no-start when hot, with the check engine light on. Scan tools often log P0335 or P0336 and show erratic or zero RPM while cranking.

Because these symptoms can overlap with coil or cam sensor issues, it’s worth checking live data, wiggle-testing the harness, and inspecting for oil or water ingress at the connector before replacing parts.

Should the crank-angle sensor be replaced as preventative maintenance?
It’s generally replaced on condition, not by a fixed interval. That said, high-mileage or heat-soaked sensors can drift or cut out intermittently. If the loom is damaged, contaminated, or the sensor shows inconsistent RPM, replacement with a quality part is a sensible move.

During major services, a quick visual check, connector clean, and verifying stable RPM on a scan tool is usually enough to keep it dependable.