29's here i have a 97 Mazda millenia 2.5 and have had the knock sensor replaced. all the Mazda 2.5 motors 95-02 are the same so i can tell you that its located in the center of the engine only accessible from the top of the motor underneath the intake and fuel rails (which have to be removed in order access the sensor). the gasket for the intake can not be reused and must be replaced. this a repair that a standard mechanic should be able to perform. hope this helps.
It is underneath the supercharger support bracket on the 2.3L.
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It is a nonservicable part, just replace it.
replace your MAF sensor.
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When that happened to me it was the sensor to the air filter. I had to replace the air filter and sensor.
On the transmission output shaft housing on the side closest to the firewall.
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bottom
Most knock sensors are located in the block on the firewall side. Should be the only sensor with two wires in the block. It will also have a camshaft position sensor as well. Hope that helps. I am not educated on Mazda engines.
The throttle position sensor is on the throttle body.
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