ABS Sensor Replacement for Croydon Drivers

From the centre of Croydon it's about 15 minutes to our workshop in Hackbridge, over the Croydon Flyover and along the A232. We diagnose ABS warning lights properly, find out whether it's the sensor, wiring or ring, and ABS sensor replacement starts from £89.

  • ★★★★★ 4.9/5 from 87 Google reviews
  • ~15 min from Croydon
  • Mon–Sat 8am–8pm
Audi SQ5 in for brake and wheel-speed work at KITH Cars Garage & Bodyworks, Hackbridge

Trams, flyover traffic and why ABS matters in Croydon

Croydon's town centre asks a lot of your brakes. Traffic on the Croydon Flyover and Duppas Hill Road can go from moving to stationary quickly, trams cross the roads around the town-centre loop, and outside East Croydon station and Boxpark people step into the road. Tram rails can be slippery in the wet, too. These are exactly the moments when ABS stops the wheels locking and lets you steer while braking hard. With the ABS light on, that help isn't there.

Croydon's high-mileage cars, particularly private hire and delivery vehicles, tend to see ABS faults sooner. Constant braking means frequent pad and disc changes, and every time the brakes are worked on there's a chance a sensor or its wiring gets disturbed or stretched. Out in Shirley and the quieter suburbs, older cars are more likely to suffer corrosion around the sensor after years of road spray and winter salt. Either way, an ABS warning light is an MOT failure, which matters to anyone whose car has to stay licensed for work.

We read the ABS module to identify the wheel and fault type, compare live wheel speeds, and test the sensor and wiring. If a sensor was disturbed during recent brake work, we check the connector and routing first, because sometimes the fix is simpler than a new sensor. Where the sensor has failed, we fit an OE or OE-equivalent part and route the wiring correctly. You'll get a written quote before we start.

From the town centre, take the Croydon Flyover west onto Duppas Hill Road, continue over Fiveways onto Croydon Road through Waddon and Beddington, then turn right onto the A237 at Wallington Green for Hackbridge, about 4.5 miles. With only the ABS light on, the car can usually be driven carefully. The repair is covered by our 3-month workmanship warranty.

ABS Sensor Replacement: what’s involved

Each wheel has a speed sensor that reads a toothed or magnetic ring turning with the hub or driveshaft. The ABS module constantly compares the four signals. If one wheel slows too quickly under braking, the system releases and reapplies that brake to stop it locking. The same signals feed traction control, stability control and often the speedometer, hill-hold and tyre pressure warning.

Older cars use passive sensors that generate their own signal. Most modern cars use active sensors, which are powered by the ABS module and often read a magnetic encoder built into the wheel bearing seal. Sensors sit right next to the brakes, exposed to heat, water, salt and brake dust, so corrosion, damaged wiring and failed connectors are common. When a signal drops out, the system switches ABS and stability control off and lights the warning. Your normal brakes still work.

From £89Written quote first
45 minutes–2 hoursTypical time in the workshop
3 monthsWorkmanship warranty
4.9★87 Google reviews

Signs of an ABS sensor fault

ABS warning light on

A steady ABS light means the system has switched itself off. Normal braking still works, but the wheels can lock under heavy braking.

Traction and stability lights too

Because they rely on the same wheel speed signals, the traction control or ESP light usually comes on with the ABS light.

Light comes and goes

An intermittent warning, often after bumps, in wet weather or at a certain speed, usually points to damaged wiring, a loose connector or a corroded sensor.

ABS pulsing at low speed

If the pedal pulses and the ABS activates when stopping gently, a sensor may be giving a false reading from a dirty sensor or a cracked reluctor ring.

Speedometer or tyre warning faults

On cars that take road speed or tyre pressure monitoring from the wheel sensors, a faulty sensor can upset the speedometer or set a tyre warning.

Other systems disabled

Hill-hold, cruise control, stop-start and some electric parking brake functions may stop working when a wheel speed signal is missing.

When should it be done?

ABS sensors have no replacement interval. They are replaced when they fail or when their wiring is damaged. Get the car checked as soon as the ABS light comes on, because the car won't stop as well in an emergency on a wet road without ABS and stability control. An ABS warning light that stays on is also an MOT failure. Faults often show up after brake, hub or suspension work, when a sensor or its wiring may have been disturbed.

  • ABS, traction or stability warning light on
  • Intermittent warnings in wet weather or over bumps
  • Warning lights after brake, wheel bearing or suspension work
  • Before an MOT if the ABS light is showing

How we replace an ABS sensor

  1. Check-in and symptomsWe ask when the light appears and whether any work has been done recently, as disturbed wiring after brake or suspension work is common.
  2. Diagnostic scanWe read the ABS module fault codes to identify which wheel is affected and whether the fault is signal, circuit or plausibility related.
  3. Live data and testingWe compare live wheel speed readings on a road test or ramp and test the sensor circuit with a multimeter or oscilloscope to separate sensor, wiring and ring faults.
  4. Inspect the ring and bearingWe check the reluctor ring or magnetic encoder for cracks, corrosion or damage and check the wheel bearing for play, as either can cause a false signal.
  5. Written quoteWe explain the cause and give you a written quote. If the encoder is built into the wheel bearing, we'll explain why the bearing may need replacing.
  6. Replace the sensorWe carefully remove the old sensor, which is often seized in the hub, clean the mounting, and fit the new sensor with its wiring routed and secured correctly.
  7. Clear codes and road testWe clear the fault codes, road test to confirm all four wheel speeds read correctly and the warning lights stay off, and run any calibration the car needs.

Parts we fit

Sensors must match the car exactly. Active and passive types are not interchangeable, and connectors and lengths vary between models and even between axles. We fit OE or OE-equivalent sensors from manufacturers such as Bosch, ATE or Continental. Where the wiring is damaged we repair it properly with sealed connectors, and where the fault is in a reluctor ring or a wheel bearing encoder, we replace that part rather than just the sensor.

  • OE or OE-equivalent ABS wheel speed sensors
  • Reluctor rings where cracked or corroded
  • Wheel bearings with integral magnetic encoders where required
  • Sensor wiring and sealed connector repairs

How long it takes

45 minutes–2 hours

A straightforward sensor swap often takes under an hour. Seized sensors, wiring repairs or a reluctor ring or wheel bearing replacement take longer. Most jobs are completed the same day.

What’s included

  • ABS system fault code scan
  • Wheel speed live data check
  • Sensor circuit and reluctor ring inspection
  • Correct replacement sensor fitted
  • Fault codes cleared
  • Road test to confirm the warning lights stay off

From Croydon to our Hackbridge workshop

From the town centre take the Croydon Flyover (A232) west onto Duppas Hill Road and Epsom Road to the Fiveways junction with Purley Way (A23). Continue on Croydon Road (A232) through Waddon and Beddington, past Beddington Park, to the junction with Manor Road and London Road in Wallington, then turn right onto London Road (A237) and head north to Hackbridge; Soho Mills is on the right.

Take the flyover and the A232 through Waddon and Beddington, then the A237 north to Hackbridge, about 15 minutes. Drive gently and keep extra distance with the ABS light on.

Directions from Croydon

About Croydon

Croydon is one of the largest commercial centres in Greater London: a dense town centre of office towers, flats and shopping around East and West Croydon stations, ringed by Victorian and Edwardian terraces and leafier inter-war suburbs such as Addiscombe, Shirley and South Croydon. It is a busy place with a large commuting population thanks to fast trains to London Bridge and Victoria. Driving through the centre means multi-lane gyratories, the Croydon Flyover and Underpass, tram tracks and heavy traffic on the A23 and A232 corridors, while the side streets are mostly 20mph and tightly parked.

Places nearby: East Croydon station, Boxpark Croydon, Croydon Minster, Whitgift Almshouses, Fairfield Halls, No. 1 Croydon

Postcodes: CR0, CR2, CR9 · London Borough of Croydon

More about KITH for Croydon drivers

ABS Sensor Replacement in Croydon: your questions answered

I drive private hire in Croydon. Will an ABS light stop me working?

An ABS warning light that stays on is an MOT failure, and licensing inspections are likely to pick it up too. It's worth fixing quickly. Many ABS sensor jobs take under an hour or two, so the car is often back the same day.

The ABS light came on after new brakes. Did the garage break something?

Not necessarily. Sensors that are already corroded often fail when disturbed, and connectors can be knocked during brake work. We'll check the sensor, wiring and connector and explain what we find, without assuming anything.

Can I just clear the ABS light before my MOT?

If the fault is still there, the light will come back on, usually within a short drive. The MOT tester will see it, and the car still won't have working ABS. It's better to find and fix the cause.

Is it safe to drive with the ABS light on?

The car will still brake normally, so you can usually drive it carefully to the garage. But without ABS and stability control the wheels can lock under hard braking, so leave extra distance. If the brake warning light is on as well, get advice before driving.

Will an ABS light fail the MOT?

Yes. An ABS warning light that stays on, or doesn't come on when the ignition is switched on, is an MOT failure. The same applies to the electronic stability control warning on cars that have it.

Can I just clear the code?

If the fault is still there, the ABS module will find it again, usually within a short drive. Clearing codes without finding the cause just delays the repair.

Why might I need a wheel bearing as well?

On many modern cars the magnetic ring that the sensor reads is built into the wheel bearing seal. If that encoder is damaged or the bearing has excessive play, a new sensor won't cure the fault, and the bearing has to be replaced.

Why did the light come on after my brakes were done?

ABS sensors and their wiring sit close to the brakes and hubs, so they can be knocked, stretched or left unplugged during brake or suspension work. Sometimes an old sensor that was already corroded fails when disturbed. A quick scan shows which wheel is affected.

Price your ABS sensor replacement now

Enter your reg and we’ll look up your car and price the job from our own labour rates and the book time for your model. Then book it in with a fixed written quote before any work starts.

  • Free, about 30 seconds, no sign-up
  • Parts, labour and VAT included
  • 3-month workmanship warranty
  • Collection from Croydon can be arranged
“It’s rare to find a garage you can truly trust. Fair price, brilliant customer service.”Thinushan K. · ★★★★★ Google

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