Fully run in and going strong!
Join Date: Jan 2007
Location: Farnborough Hampshire
You can machine the original switch and repair it for free, there will be nothing wrong with it electrically, it is just wear on the probe making it not throw far enough into the switch, shave about 1.5mm from the landing flats.
Or get a new on from Milner 4x4, OR should you be absolutely minted get a Nissan one for over £70 (robbing bas**rds!).
As Keith has already said it will have no effect on speed, the engine has not been running right due to the defective switch, also blanking the EGR will benefit it enormously.
Very first upgraded D22 - 10 years and 72K miles and still going strong!