Parts for your 2012 Subaru Exiga-Map sensor

2012 Subaru Exiga MAP sensor: purpose, care and when to replace

Based on Subaru’s factory literature for the Exiga YA series and the Subaru FAST parts catalogue, the 2012 Subaru Exiga is fitted with a manifold absolute pressure (MAP) sensor. On naturally aspirated models it’s listed as the Intake Manifold Pressure Sensor, while turbo variants describe it as a Boost (MAP) Sensor. Diagnostic coverage for this vehicle family includes MAP-related DTCs such as P0106–P0108 in Subaru workshop manuals and global OBD references, confirming the MAP sensor’s role.

On this Exiga, the MAP sensor reads the absolute pressure inside the intake manifold. The engine control module uses that data—along with engine speed, intake air temperature and, on many trims, the MAF signal—to calculate load, fine-tune fuel delivery and set ignition timing. On the turbo models it also helps the ECU monitor boost and protect the engine under heavy throttle. In short, it’s a small part doing big maths to keep the Exiga smooth, efficient and compliant with emissions rules.

When a MAP sensor drifts or gets fouled with oil mist, drivers may notice lazy throttle response, rough idle, higher fuel use, or the check engine light. Scan data that shows implausible manifold pressure (for example, not near local barometric pressure with the key on, engine off) is a giveaway. Subaru technical sources note that the ECU will often default to a limp strategy, so it’ll still run—but not flash.

• Inspection tips: Check the MAP sensor’s electrical connector for corrosion and the vacuum path (if hosed) for splits. Under the bonnet, per service manual guidance, the reading with key on/engine off should sit close to ambient (around 100 kPa at sea level).
• Cleaning: If contamination is visible, remove the sensor and gently clean only the port with electronics-safe spray. Don’t poke the sensing element.
• Replacement: Use a quality OEM-equivalent sensor, swap the O-ring if fitted, and nip the bolts to the light torque specified in the Subaru manual (over-tightening can crack housings). Clear DTCs and take a short relearn drive so fuel trims settle.
• Service interval: There’s no fixed replacement interval in Subaru schedules, treat it as condition-based. Include a quick visual and scan check during routine servicing, especially if the Exiga does short trips or has an oil mist issue.

Popular questions about 2012 Subaru Exiga MAP sensors

Where is the MAP sensor on a 2012 Exiga?
On most Exiga variants it’s mounted on or near the intake manifold close to the throttle body, with a small electrical connector. Turbo models may refer to it as a boost sensor but it serves the same pressure-sensing function. A quick look under the bonnet from the front, slightly to the right of centre, usually spots it.

Can a MAP sensor be cleaned or should it be replaced?
Light contamination can often be cleaned using electronics-safe cleaner on the port only. If the sensor shows erratic readings, sets repeat MAP codes, or has water/oil ingress in the connector, replacement is the better bet. After any work, clear codes and verify live data reads sensibly.

Does the Exiga have both MAF and MAP?
Many 2012 Exiga trims use both. The MAF measures incoming air mass, while the MAP reads manifold pressure, the ECU blends the two for accurate load calculation. Turbo versions rely on the MAP for boost control as well.