ok so 80yr old dad has my 2007 freelander now ,its doing well but he mentioned he changed the front pads and now has 3 amigos on ,any ideas? i wondered if it was a abs sensor.How do we replace these ??

The wheel speed sensor is used for ABS and other things like traction control.

It should be easy to replace, one end bolts onto the wheel hub assembly, the other is an electrical connector which should (IIRC) be accessible from the wheel well. The wire has rubber grommets which will fit into slots to hold it in place.

Probably easier if you jack it up and remove the wheel but you might be able to do it with the car on the ground.

A scantool might tell you which sensor is bad, or you could install a new sensor on one side and then move it to the other side if that doesn't fix the problem. You might need the scantool to reset the codes anyway, not 100% sure they'll clear on their own after you replace the sensor.

But I'd crawl under there and inspect both sensors, wires, and connectors... might be obvious damage or even a disconnected electrical connector on the chassis end. Or the damage might not be visible.

Another thought... if for some reason the car was powered on with a caliper removed, the ABS might have failed a POST. In that case there should be a code of some sort for that, and it should be able to be reset with a scantool now that the caliper is installed.

peter2704 wrote:

ok so 80yr old dad has my 2007 freelander now ,its doing well but he mentioned he changed the front pads and now has 3 amigos on ,any ideas? i wondered if it was a abs sensor.How do we replace these ??

i dont think he damaged anything ,just a coincidence, found a code in my tester U0121 ??? abs module not found,
it clears and seems to come on if i drive over a bump ???

Check for starters the front ABS sensor cable connectors. Both for connection and corrosion of the pins

would this throw this code?

Yes, if the system cannot see the wheel speed (on any wheel) it will de-activate ABS, traction control, etc.

peter2704 wrote:

i dont think he damaged anything ,just a coincidence, found a code in my tester U0121 ??? abs module not found,
it clears and seems to come on if i drive over a bump ???