Hi all, just finish giving the MAF sensor a good clean. Bought a can of CRC MAF Sensor Cleaner from SCA for $26:95. Put the white rag underneath to catch all the dirty solvent, and it came out clean as a whistle. I had a receipt for a full service the dealer had done before I purchased the Patrol , but it made no mention of the MAF Sensor. But job done now and I feel good.