Parts for your 2010 Subaru Impreza-Map sensor

2010 Subaru Impreza MAP sensor – what it does and how to look after it

Yes, the 2010 Subaru Impreza uses a MAP (Manifold Absolute Pressure) sensor. Subaru’s factory service information (2010 Impreza Service Manual, Engine/ECM Diagnostics – “Manifold Absolute Pressure Sensor”) and the Subaru Technical Information System, along with the Subaru parts catalogue listings for 2010 Impreza variants (naturally aspirated EJ20/EJ25 and turbo EJ255/EJ257), all show a fitted MAP sensor and related OBD-II diagnostics such as P0106, P0107 and P0108. So it’s absolutely relevant on this model.

On the 2010 Impreza, the MAP sensor measures the absolute pressure inside the intake manifold. The engine control module uses that signal to work out engine load, trim fuel and ignition timing, and on turbo models keep tabs on boost. Even on MAF-equipped trims, the MAP signal helps with transient response, altitude compensation and failsafe operation. In short, it’s a small part with a big say in how smoothly the Subaru runs and how efficiently it sips petrol.

There’s no set replacement interval for the MAP sensor, but it’s smart to check it during regular servicing (every 40–60,000 kilometres or when chasing drivability gremlins). Oil mist and dust can build up at the sensor port over time, especially if the PCV system is breathing a bit heavier.

Common signs the MAP sensor needs attention:

• Rough idle, flat spots or hesitation under load
• Higher fuel use than usual and a whiff of black smoke on throttle
• Check Engine Light with codes like P0106/P0107/P0108

Basic care is easy under the bonnet: with the engine off, unplug the connector, remove the fixing screws or bolts, and lift the sensor straight out of the manifold. Keep the O-ring clean and replace it if it’s flattened or cracked. If the sensing port looks dirty, a gentle spray of electronics-safe cleaner is fine—don’t poke anything into the port, and don’t soak it. Refit the sensor and snug the fasteners to the factory spec (just nip them up—no gorilla grip). Reconnect the plug, start the car, and let it idle for a minute so the ECU settles. A short mixed drive helps the ECU relearn neatly.

When replacement is needed, go for quality OEM or reputable aftermarket units that match the Impreza’s calibration. That keeps the tune happy and avoids chasing your tail with cheap, flaky signals.

Popular questions about 2010 Subaru Impreza MAP sensors

Does the 2010 Subaru Impreza have both a MAF and a MAP sensor?
Most trims do. The ECU typically uses the MAF for primary airflow calculation and the MAP for manifold pressure, transient response, altitude correction, and (on turbo models) boost monitoring. This setup is confirmed in Subaru’s 2010 Impreza service documentation and diagnostic charts.

Where is the MAP sensor on a 2010 Impreza?
It’s mounted on the intake manifold/plenum with a small O-ring seal and a three‑wire connector. On turbo variants, it’s positioned to accurately read post‑throttle pressure for boost control and load. Access is under the bonnet with basic hand tools.

Can a dirty MAP sensor be cleaned, or should it be replaced?
Light contamination can usually be cleaned with electronics-safe cleaner. If the sensor throws persistent out-of-range codes (like P0107/P0108) or readings stay erratic after cleaning, replacement is the go. Always check the O-ring and connector condition at the same time.