I’ve a weird one here. Two or three months ago my ABS warning light started coming on intermittently. The mechanic said the system was flagging a problem with the front left sensor but the reluctor disc (?) was dirty and when he cleaned it up the problem went away. Sorted ...? Then a few weeks ago the problem recurred but this time the error code is for the rear left sensor and this time cleaning it up doesn’t help. The light generally only comes on after about half an hour of driving. Sometimes the rear left code is followed by a rear right code, all indicating a sensor problem. Another driver helpfully caused me to test the ABS (!) the other day and it worked fine. It seems too much of a coincidence for two or three sensors to fail within the space of a few months. Has anyone else had anything similar? And where can I get a replacement sensor anyway? (07 plate, 1.3L). Several dealers have drawn a blank.