Yes thats the correct number and you only need the element, not the whole £250 unit.
You will need a Security Torx tool to replace it, or do what I did and snap the security pip off the screw and use a normal torx bit.
A good check to verify the MAF it to dicsonnect the battery for 1/2 hour then re-connect.
It may run really lumpy then, as it will of reset any learning the ECU has done to compensate for the faulty MAF.
You can also doa diagnostic check, but it doesn't always detect everything, see my FAQ on
http://www.polarperformance.co.uk
Sometime the CEL also comes on flagging a faulty 02 sensor.
It's quite common for these to fail together as they work with one another.