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Your cart is empty.Walker Products Manifold absolute pressure sensors MAP Sensor measure manifold pressures through changing voltage and sends this information to the onboard computer. The computer uses this and other inputs to calculate the correct amount of fuel delivered. Symptoms of failure include poor starting, detonation, a check engine light, and or no start conditions. Sensors are non-serviceable and therefore must be replaced when non-functional. Walker Products began supplying the fuel system and engine management needs of the automotive industry since 1946. We continue our commitment to supplying products manufactured to meet or exceed OEM standards and specifications with the highest quality products. 2000-2013 BMW 323i,BMW 325i,BMW 325xi,BMW 328i xDrive,BMW 328i,BMW 328xi,BMW 330Ci,BMW 330i,BMW 330xi,BMW 525i,BMW 525xi,BMW 530i,BMW 530xi,BMW 545i,BMW 550i,BMW 645Ci,BMW 650i,BMW 745i,BMW 745Li,BMW 750i,BMW 750Li,BMW 760i,BMW 760Li,BMW M5,BMW M6,Rolls-Royce Phantom,BMW X3,BMW X5,BMW Z4,