How do I rebuild a mass air flow sensor in a Toyota?

Answer by  Anonymous

Of course they can be rebuilt -- that's why they charge a core fee when you buy a new one. Someone is rebuilding them.

Answer by  thattractorguy (2970)

There is really no way to rebuild it. You can try cleaning it up. Remove the sensor and spray it with some carburetor cleaner. You can use a toothbrush to scrub it but be very careful. Then just reinstall the sensor. If this doesn't work, it will need replacement.

Answer by  Jsands1982 (871)

You want to remove negative battery cable because it is eletrical. Make sure you've got all proper gaskets. Start with the air filter, remove all surrounding hoses to the device.

Answer by  worker2746 (2434)

It is very difficult to rebuild these sensors. I would recommend that you find a junkyard that sells used auto parts. There are a lot of these available. If you check in your Yellow Pages you will more than likely find a place that has Toyotoa spare parts in your area.

Answer by  Jenny30 (161)

A mass air flow sensor cannot be rebuilt. Mass air flow sensors must be replaced if bad. You can replace the sensor with a used part for an economical repair

Answer by  Amber40 (24961)

As far as I know there is no way to rebuild your worn out MAF sensor. They can be cleaned but there really isn't anything that gets worn.

Answer by  Anonymous

if it's a vane type, you cut open the black box, and relocate the wiper arm higher or lower on the resistor swipe. See Youtube videos of guys doing it on Bosch MAFs

Answer by  japratt (1687)

If you are about to attempt to rebuild the mass air flow sensor then you will need to take out the whole system before your go any further. Once the system has be removed you will need to make the necessary improvements. Then you will be able to put it back in.