3-Bar MAP Sensor

The Bosch 3-Bar Manifold Absolute Pressure (MAP) Sensor, with part number 038906051C, is a critical component for managing boost pressure in performance applications. This OEM sensor from Bosch is designed to provide closed-loop boost control at absolute pressure levels exceeding 2.5 bar, making it an ideal upgrade for vehicles equipped with aftermarket turbocharger kits or those undergoing performance tuning. While many factory VAG vehicles come standard with a 3-bar MAP sensor and its associated calibration settings, their factory tuning typically only supports closed-loop boost control up to 2.5-bar absolute. This Bosch sensor expands that capability. It's important to note that this sensor cannot be installed or function correctly without the appropriate 3-Bar map sensor software. Running the sensor without the correct ECU calibration will result in improper engine operation and can cause damage. The manufacturer is not responsible for issues arising from improper sensor selection or installation. This sensor is also described as VIN-specific, and users are advised to verify their existing part number or contact the seller before ordering to ensure compatibility. It is recommended for use when upgrading the turbo in engines like the ALH, BEW, or BRM, as its 3-bar range supports higher turbo pressures. It is also noted as an ideal upgrade from standard 2.5 BAR MAP sensors, which cannot accurately read boost pressures above 1.5 BAR.