Bmw I3s Brake Pad Wear Sensor in US

A disc brake pad wear sensor on the Bmw I3s is your vehicle's advance warning system for brake pad replacement. It eliminates the need to rely on audible squealing from your I3s to know your pads are getting thin, instead triggering a dashboard warning light at a preset minimum thickness on the Bmw I3s, giving you time to plan the replacement before the pads wear through to the metal backing plate. Replacing a triggered sensor with every I3s pad change is the only way to keep that early-warning system working for the next service interval.

How the Brake Pad Wear Sensor Works on the Bmw I3s

The wear sensor on the Bmw I3s is a small probe embedded in or clipped to the brake pad. When the I3s pad wears down to the replacement threshold, the probe contacts the rotor surface. This contact creates a circuit change that signals the Bmw I3s ABS or brake control module, illuminating the brake warning light. Once the probe on the Bmw I3s has contacted the rotor, it is destroyed and cannot be reused. It is a single-use component by design on the I3s.

Why Replace the Wear Sensor at Every Bmw I3s Pad Change

Installing fresh brake pads on the Bmw I3s without fitting a new wear sensor defeats the entire purpose of having a brake monitoring system on your I3s. A previously triggered sensor probe is worn through and has no remaining material to detect the next set of I3s pads wearing down. From day one of the new Bmw I3s brake pads, the warning system is non-functional without a new sensor.

Signs the Wear Sensor on Your Bmw I3s Needs Replacing

• Brake warning light staying on your Bmw I3s after new pads have been fitted
• Intermittent brake warning light on your I3s that clears and returns without obvious cause
• Visible wear notch or contact mark on the Bmw I3s sensor probe tip
• OBD fault codes on your I3s referencing the brake pad monitoring circuit

Why GeoBrakes for the Bmw I3s Brake Pad Wear Sensor

Wear sensor compatibility for the Bmw I3s is more exacting than most brake parts. The probe length, contact resistance specification, and connector design must all match the I3s brake monitoring circuit precisely. A wrong sensor triggers Bmw I3s warnings at the wrong pad thickness, or not at all. Every sensor in the GeoBrakes catalogue is sourced to original equipment probe and connector specifications for the Bmw I3s, with front and rear positions listed separately.

Frequently Asked Questions - Bmw I3s Brake Pad Wear Sensor

Do I need to replace the brake pad wear sensor every time I change pads on my Bmw I3s?

Yes, on Bmw I3s vehicles equipped with electronic wear sensors. The sensor probe on your I3s is a single-use component. Once it has contacted the rotor and triggered the I3s warning light, the probe is consumed. Always replace the Bmw I3s sensor during every pad change.

Does my Bmw I3s have electronic brake pad wear sensors?

Many vehicles use a mechanical wear indicator instead of electronic sensors. Check your Bmw I3s owner's manual or use the GeoBrakes vehicle selector to confirm whether your I3s uses an electronic pad monitoring system.

Can a faulty wear sensor keep the brake warning light on my Bmw I3s on after new pads are installed?

Yes. If the Bmw I3s wear sensor from a previous brake service was not replaced, or if the probe has been damaged on your I3s, the brake warning light will remain on even with new pads. Replacing the I3s sensor will clear the fault and restore normal operation.