The ABS (Anti-lock Braking System) is one of the most important safety features in a modern car. It prevents the wheels from locking during hard braking, helping you keep steering control and shorten stopping distance on a slippery surface. At SerwisUA (Wrocław) we specialise in diagnostics, servicing and repair of ABS systems in passenger cars and vans. This article explains how ABS works, the most common failure symptoms, and why you should not put off the repair.
What is ABS and how does it work?
ABS monitors wheel rotational speed during braking. When it detects a risk of lock-up, special valves reduce pressure in the brake circuit and then raise it again — this happens dozens of times per second.
Main ABS components:
- electronic control unit (ECU),
- wheel speed sensors,
- hydraulic module with valves and a pump,
- electrical wiring and power supply.
A working ABS system provides:
- steering control during emergency braking,
- a lower risk of a skid,
- an optimal stopping distance on a wet or slippery surface.
The most common ABS failure symptoms
Modern cars have built-in diagnostics, but there are also clear signs that the ABS needs checking. The most common symptoms are:
✅ ABS warning light on the dashboard The most obvious sign — a lit lamp means a stored fault or a serious failure.
✅ Unusual brake pedal behaviour Pulsing, sinking or unnatural stiffness can mean a problem with the ABS module or its valves.
✅ No characteristic pulsing during emergency braking If you do not feel the pedal “releasing” during a sudden stop, the system may be off or damaged.
✅ Faults in the car’s electronics Reading trouble codes often points to wheel speed sensors or the wiring.
✅ Uneven braking The vehicle pulling to one side during hard braking can suggest problems with the ABS module or the sensors.
The most common causes of ABS faults
At SerwisUA we most often diagnose these failure causes:
- dirty or mechanically damaged wheel sensors (mud, ice, hub corrosion),
- damaged wires or connectors (for example after suspension repair or a collision),
- wear of the hydraulic module or its valves,
- ABS pump failure,
- electronic control unit faults.
Road conditions in Wrocław — a damp autumn, winter salt spreading — speed up corrosion of connectors and sensors. That is why regular diagnostics matter.
How ABS diagnostics and repair look at SerwisUA
Our workshop in Wrocław has modern diagnostic equipment for most car brands.
✅ Computer diagnostics Reading faults from the ABS controller is the first and key step — it locates the problem quickly without unnecessary cost.
✅ Wheel sensor check We test each speed sensor and the condition of the wiring harness.
✅ Hydraulic module inspection We check the valves, the pump and any brake-fluid leaks.
✅ Power and earth verification Many ABS failures come from corrosion or broken earth connections.
✅ Repair or replacement of parts If needed we replace sensors, repair or replace the hydraulic module, and code new parts with a diagnostic tester.
Why choose SerwisUA in Wrocław?
✅ Experienced mechanics We specialise in brake systems and have years of experience repairing ABS on different brands.
✅ Modern equipment We use professional diagnostic scanners to pinpoint faults accurately.
✅ High-quality parts We fit genuine parts or proven replacements with a warranty.
✅ Transparent quote You get the repair price before work starts — no surprises.
✅ Convenient location in Wrocław Easy to reach from different parts of the city.
Do not put off an ABS repair!
A working ABS is a matter of your safety and the safety of other road users. Ignoring a warning light or brake problems is a real risk on the road.
At SerwisUA we will diagnose the system quickly and professionally, quote the repair honestly and fix any ABS fault.
Book a diagnostic appointment today — look after your safety on Wrocław’s roads!
SerwisUA — your trusted car workshop in Wrocław. We look after your car as if it were our own.
- ABS system — diagnostics and repair in Wrocław
- ABS check with modern equipment
- Repair of ABS sensors and the hydraulic module
- Safe braking — our speciality