Parts for your 2004 Daihatsu Yrv-Map sensor

2004 Daihatsu YRV MAP sensor — purpose, care and when to replace

Technical documentation confirms the 2004 Daihatsu YRV uses a MAP (manifold absolute pressure) sensor. The Daihatsu YRV Workshop Manual for the K3-VE/K3-VET engines (Engine Control/EFI Diagnostics) lists the manifold pressure sensor and the related OBD-II fault set P0105–P0108 for MAP circuit range and performance. Factory Electrical Wiring Diagrams show a three-wire pressure sensor feed (5 V reference, signal, earth) on the intake side, and major aftermarket catalogues from Denso/NTK also list a direct-fit manifold pressure sensor for 2004 YRV applications. So, yes—the MAP sensor is relevant and fitted on the 2004 Daihatsu YRV, including the turbo K3‑VET which reads boost as absolute pressure.

On this model, the MAP sensor is the ECU’s main way of figuring out how much air the engine’s actually swallowing. It measures intake manifold pressure, the ECU pairs that with intake air temp and engine speed, and then it calculates fuel and spark. On the turbo YRV, the same reading also helps manage boost targets and protect the engine under high load. When the MAP reading goes off, the tune goes off—expect rough idle, doughy throttle, poor fuel economy and the odd stall or limp-home.

Servicing is straightforward and worth doing during routine maintenance of a 2004-daihatsu-yrv/map-sensor. If access allows, a gentle clean of the sensor’s port with electronics-safe cleaner can help if there’s light oil mist or carbon. Don’t jab the sensing element. Check the vacuum hose (if your variant uses a remote-mounted sensor) for splits, soft spots or loose clamps—any leak will skew readings. Also confirm the 5 V reference and earth are solid if you’re chasing an electrical fault.

• Common signs it’s tired: hesitation on take-off, surging, black smoke, higher fuel use, hard starts, and MAP-related fault codes (P0105–P0108).
• Replacement tips: disconnect the battery, unplug the connector, remove the retaining screw(s), swap the O-ring if supplied, and torque the new unit snugly—no gorilla grip.
• After install: clear codes, then do a short drive so the ECU can relearn trims. Keep an eye on idle quality and boost behaviour (turbo models).

There’s no fixed replacement interval, but many owners fold MAP inspection into their 20,000 km service rhythm. If the car lives on short trips or has a bit of blow-by, check it more often. Using quality fuel, keeping the PCV system healthy and servicing the air filter on time all help the MAP sensor live a long, uncomplicated life.

Popular questions about the 2004 Daihatsu YRV MAP sensor

Where is the MAP sensor located on a 2004 YRV?
On most K3-VE engines it’s mounted on or near the intake manifold with a three-pin plug. Some variants use a short vacuum hose to a bracketed sensor. The K3-VET turbo also reads pressure on the intake side to manage boost.

Can a dirty MAP sensor be cleaned, or should it be replaced?
Light contamination can be cleaned with electronics-safe cleaner. If the sensor’s electronics have drifted or you’ve got repeated P0105–P0108 codes after cleaning and hose checks, replacement is the reliable fix.

What’s the difference between the MAP sensor and a boost sensor on the turbo YRV?
They both measure pressure. On the K3-VET, the ECU uses the absolute pressure reading for load and boost control. Some catalogues call it a boost sensor, but functionally it’s the MAP reading that the ECU cares about for fueling and timing.