Most likely an ABS sensor. You might be able to get a code reading to say
which one, or check them all with a 'scope or decent DVM by spinning the
wheel - this should show the faulty one by comparison. They usually get
destroyed on removal, so make sure you get the right one. ;-)
*Change is inevitable ... except from vending machines *
Dave Plowman firstname.lastname@example.org London SW
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.