Possible reluctor ring issue
 

Hello,
I have had a 2004 2.5 AWD manual X type for 14 years. No problems to mention until now.
When I brake, just before the car stops, about 2MPH, I can feel the ABS kicking in slightly. Not always but more often than not. No warning lights on dashboard.
Is this the reluctor rings? If I get a code reader will it show which wheel it is, even though no light is on?
Or will I have to physically examine the rings?
Any help or advice would be appreciated.
Thanks in advance.

I had a similar one on my 2004.
Corrosion on the disc had moved the reluctor ring too close to the wheel speed sensor (left rear).
Put a washer under the sensor and it has been fine ever since.

Looked at reluctor ring through the sensor hole. It was polished over about 10% of its surface, where it was touching the sensor. Corrosion underneath the ring has pushed it slightly out of true. Otherwise seemed ok.
As Steve kindly suggested in the above post I fitted a thin 8mm washer between the housing and the hub. Problem solved (for now).
Obviously, this is a cure for the symptom, not the cause, but its a 5 minute job, not 5 hours. You can do it while the car is still on its wheels.
Right rear.

Result!
Mine's been fine for about 3 years now; if it goes again I'll put a thicker washer under it!