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M.A.S. ;99 Rodeo.I own a '99 Isuzu rodeo, so this may not be exactly it, but should be close.

My mass airlfow sensor is located between the filter and the throttle body. It is inline with the intake hose. This is in my experience the typical location for it. Itlooks like a ring around the intake hose with a box maybe 3"x3"x1" with a wire attached to it. Usually, if you detach the hose from the filter box, and look into the hose, you'll see a mesh grating. This protects the sensor from any debris in case anything were to get past the filter.

If you're very careful, sometimes you can clean the sensor elements and avoid replacing the sensor. Remove the sensor, remove the mesh and spray with a cleaner that leaves no residue (brake cleaner is good-- not carb cleaner) if necessary, gently wipe the sensor elements. They are fragile.

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