Brake failure stop asap lights and stc/abs/brake/airbag light what does it mean and how bad is it?

The light being on means the system has detected a problem in one or more sensors. The vibration is the ABS modulating the brakes to prevent skidding because it has detected a wheel that is locked up. That wheel is most likely the one sensor that is giving you the error.

transmisson replacement is necessary.
thanks.

the ABS and traction light are on due to a failure with the speedometer. I SUSPECT A SEED SENSOR would be the culprit as if speed is not sensed from a wheel (RF / LF /RR / LR) the ABS module with be disabled and would lite the ABS and Brake light. the airbag and heated seats are on separate circuit. the air bag should be diagnosed with a handheld device ( go to advance auto or similar type parts store)n they will read the code.. post the code and I may be able to help ... also ask em to get the ABS / Brake codes a ell

Check rotor and brake pad thickness.
Then,
Check the sensor.
then
Check the computer and reset condition codes.
Best,

having the same problem with my 1999 s80 2.9 . replaced the abs module twice and still get the brake failure warning. when the ignition key is turned there is a clicking sound from the center console beneath the shifter, then the brake failure warning, and the car will not start. (also after the last abs module replacement the car sometimes gets stuck in park).

i had a problem in my S80 .Abs ,STC Brake failure,check Engine and speedometer all of tese didn't work , i just changed the ABS module...it's done now :) just perfect

Usually means you need to have it serviced asap. This usually signifies the ABS sensor is bad or some other serious problem. While this light is on, your anti-lock brake system will not work, so it can cause serious problems if you need to stop in a hurry.

Your ABS Computer is likely failing. They have problems with the solder joints on the circuit board, causing a code to be set and the lights to come on. Very common on this vehicle!

Bret

the ring you mention removed is called the exciter ring and is a vital part of the abs system to work properly so have new ring fitted asap this is why abs light etc is on in the uk this would fail mot safety test i am surprised the garage?? did ot renew this exciter ring? knowing it affects the abs ie makes it none operational should it need to operate ? also if involved in accident? and car brakes are checked this serious fault may have an effect on insurance claim hope this explaines??

Your ABS light means you have a SERIOUS problem in your braking system!! Get that checked out ASAP!! you could be facing complete braking failure! seat belts are a separate issue completely. ABS means ANTILOCK BRAKE SYSTEM.