Parts for your 2007 Daihatsu Bego-Camshaft sensor

2007 Daihatsu Bego camshaft sensor — purpose, service tips and FAQs

Based on the Daihatsu/Toyota J200-series factory service manual and the Electrical Wiring Diagram for the 3SZ‑VE engine (as used in the 2007 Daihatsu Bego, also known as Toyota Rush/Daihatsu Terios in some markets), this model is fitted with a camshaft position sensor. Those technical references show the engine control module (ECM) uses both crankshaft and camshaft signals for sequential fuel injection and VVT‑i control, and parts catalogues list the camshaft sensor as a serviceable component.

On the 2007 Bego, the camshaft sensor’s job is to tell the ECM exactly where the intake cam sits relative to the crank. That timing info lets the ECM fire the injectors in sequence, manage spark at start-up, and command VVT‑i accurately for smooth torque and good fuel economy. If the sensor goes missing in action, the ECM often falls back to batch injection and fixed timing, which can mean hard starting, rough idle, lazy throttle response and a decent bump in petrol use.

There’s no scheduled maintenance for the cam sensor, but a quick look under the bonnet during servicing pays off. Check the connector for oil wicking or green corrosion, make sure the wiring loom along the rocker cover hasn’t rubbed through, and keep the area clean. A light mist of oil from a rocker cover gasket can work its way into the plug over time, so cleaning with proper electronics cleaner (not brake cleaner) is the go.

Typical clues the camshaft sensor is on the way out include:

• Long crank or no-start when warm, occasional misfire, poor fuel economy
• Check Engine Light with codes like P0340/P0341
• Erratic idle and flat spots, especially just off idle

Replacement on the Bego is straightforward for a competent home mechanic. It usually sits on the intake side of the cylinder head and is held by a single bolt with an O‑ring seal. Standard steps are: disconnect the battery, unplug the sensor, remove the hold‑down bolt, wiggle the sensor out, lightly oil the new O‑ring, seat the new unit, then tighten the bolt to factory spec and reconnect. Always verify wiring integrity before condemning the sensor, as broken conductors in the head loom can mimic a failed unit.

With quality parts and healthy wiring, owners commonly see well over 200,000 kilometres from a camshaft sensor on the 3SZ‑VE. Replacement is done on condition—when symptoms or fault codes point to it—rather than on a fixed interval.

Where is the camshaft sensor on a 2007 Daihatsu Bego?
The sensor is mounted on the cylinder head, typically on the intake side near the front. It’s secured by a single small bolt and sealed by an O‑ring. The connector points towards the engine harness that runs along the top of the head, making access reasonable with basic hand tools once the engine cover is off.

What are the symptoms of a failing camshaft sensor on a Bego?
Common signs are longer cranking, stumbling idle, flat spots and higher fuel use. The Check Engine Light may appear with codes such as P0340 or P0341. Because wiring faults can mimic the same issues, it’s smart to inspect the plug and loom before replacing the sensor.

Is it safe to drive with a dodgy camshaft sensor?
Short trips to a workshop are usually fine, as the ECM can fall back to a limp strategy. That said, performance and fuel economy suffer, hot restarts can be hit‑and‑miss, and it could stall at the worst time. For reliability, it’s best to sort the fault promptly.