Wabco 4721951100 ABS Modulator Valve

Description

The Wabco 4721951100 is an ABS Modulator Valve, a critical component within an automobile's Anti-lock Braking System (ABS). This valve modulates brake pressure to individual wheels, preventing wheel lockup during braking and maintaining vehicle control, particularly during emergency stops or on slippery surfaces. It is a device designed to meet OE specifications, ensuring reliable performance and compatibility. This unit measures 60 x 103 x 118 mm and features an IP 67 / IP 69K protection class for robust durability. With a 24V voltage requirement and a rated current of 1650 mA, it offers precise and efficient hydraulic control. Its design incorporates features like a flap exhaust, M22 x 1.5 port threads, and a bayonet electrical connection (DIN 72 585 A1-3.1-Sn/K1) for seamless integration and reliable operation across a temperature range of -40°C to +80°C.

Key Features & Benefits

This valve is basically the heart of your anti – lock braking system. It controls the brake pressure to each wheel individually. It rapidly opens and closes, increasing or decreasing pressure as needed, allowing your wheels to keep turning even during hard braking. It works with the wheel speed sensors and the ABS control module to make all this happen. It’s a pretty complex piece, with a bunch of valves inside all working together. Think of it as the traffic cop for your brake fluid. Your master cylinder sends fluid to this modulator, and it decides how much goes to each wheel. It gets signals from your car's computer telling it what's happening with each wheel's speed. If it detects a wheel starting to lock up during braking, the modulator quickly adjusts the pressure to that wheel, letting it keep spinning. It’s all about preventing skids and helping you maintain steering control.

Symptoms, Risks & Replacements

Well, without it, you lose the anti – lock braking function altogether. Your brakes will still work, but you won’t have that extra layer of safety. It acts like a shield against losing control during a panic stop or on slippery surfaces. You’ll notice if this thing goes bad because the ABS light on your dashboard will illuminate. Sometimes you’ll feel a pulsing sensation in the brake pedal when you brake, and that might disappear, or you might have trouble stopping smoothly. It’s a safety item, so definitely something you want to address if you suspect an issue. You can often find a replacement at places like Fixparts Online, but getting it diagnosed properly first is always the best approach.

Warranty Information

Wabco ABS Modulator Valve (MPN 4721951100) comes with a 1-year warranty.