Parts for your 2007 Subaru Impreza-Map sensor

2007 Subaru Impreza MAP sensor: what it is, where it’s used, and how to look after it

Technical references: Subaru’s factory service manuals on the Subaru Technical Information System (STIS) identify a Manifold Absolute Pressure (MAP) sensor on turbocharged 2007 Impreza models (WRX/STI) as part of the engine management and boost control system. The same manuals specify that naturally aspirated 2007 Impreza 2.0/2.5i models use a Mass Air Flow (MAF) sensor for load calculation and do not fit a MAP sensor to the intake manifold. Genuine Subaru parts catalogues for MY2007 mirror this: a MAP sensor is listed for WRX/STI, while the non‑turbo variants omit it.

For 2007 WRX/STI owners, the MAP sensor is a small but vital bit of kit. Bolted to the intake manifold, it reads the absolute pressure inside the manifold so the ECU can figure out engine load. That info is used to meter fuel, set ignition timing, and manage boost. Under the bonnet, it’s one of the key sensors that keeps the turbo happy and the car running sweet as, especially under varying altitude and throttle conditions common on NZ and Aussie roads.

There’s no fixed replacement interval for a MAP sensor. It’s an electronic part that typically lasts years, but it can drift out of spec or get cranky if oil vapour or moisture sneaks in. As part of regular servicing, it’s smart to inspect the sensor body and connector, make sure the O‑ring seals properly to the manifold, and confirm the wiring hasn’t gone brittle. If cleaning is needed, only use electronics-safe cleaner—never poke the port or blast it with compressed air.

When a MAP sensor plays up, the car may feel flat, surge, or idle roughly. Fuel economy can go off, and the check engine light often pops up with codes like P0106, P0107 or P0108. On a turbo, misreads can also lead to over‑ or under‑boost. If diagnostics point to the MAP, go genuine or a reputable OE‑equivalent replacement, cheapies can cause no end of grief.

Replacement is straightforward: disconnect the battery or use a scan tool, unplug the connector, remove the fasteners, swap the sensor and O‑ring, then refit and clear codes. Afterward, let the ECU relearn at idle, then take a gentle drive so fuelling trims settle. Pair this job with a quick look for vacuum leaks and a PCV system check—it’s all part of keeping a 2007 WRX/STI crisp and reliable.

• Typical symptoms of a dodgy MAP: rough idle, hesitation, poor economy, boost issues, CEL (P0106–P0108).
• Good practice: inspect connector pins, seals and manifold mating surface each major service.
• Use OEM-spec parts and avoid over‑tightening, follow the workshop manual torque guidance.

Note for non‑turbo 2007 Impreza 2.0/2.5i: a manifold MAP sensor isn’t fitted from factory. These models rely on the MAF sensor for load, with barometric pressure handled separately within the ECU strategy.

Does a 2007 Subaru Impreza have a MAP sensor?

Turbocharged 2007 Impreza models (WRX/STI) do have a MAP sensor on the intake manifold. Naturally aspirated 2.0/2.5i models use a MAF-based system and don’t fit a manifold MAP sensor.

What are the signs a 2007 WRX/STI MAP sensor is failing?

Common clues include rough idle, flat spots, poor fuel economy, inconsistent boost, and a check engine light with P0106, P0107 or P0108. A quick scan and live‑data check will confirm if the MAP readings look off for the operating conditions.

Can the MAP sensor be cleaned, or should it be replaced?

Light external cleaning with electronics-safe spray is fine, avoid touching the sensing port or using compressed air. If readings are out of spec or faults persist, replacement with an OEM‑spec unit is the reliable fix.