i bought a new mass air flow sensor from my local motor factors as i get trade prices as mines done 97k now but it was not a bosch version so i thought i would give it a go anyway as it has a 12 month guarantee ......oh dear after i fitted it i went up the road and the tc light came on and it was almost stalling on tick over so i unpluged the sensor and it stopped hunting so i fitted the old maff on and back to normal so must have been a dodgy maf so i will take it back and in future get a bosch reconditioned one!