Mercedes Sprinter Brake Pad Wear Sensor – Sadeca | T1N & NCV3 | #2205401517 (2003–2009)

A failed or missing brake pad wear sensor on a Mercedes Sprinter removes the early warning that alerts the driver when pads are wearing thin — leaving the van running on marginal friction material with no dashboard indication until metal-to-metal contact has already begun damaging the rotors. This is the Sadeca brake pad wear sensor for T1N and early NCV3 Sprinters, a direct replacement that restores accurate pad wear monitoring and proper dashboard warning function.

What This Part Does

The brake pad wear sensor clips into the brake pad backing plate and monitors pad thickness through a resistive wire element. As the pad friction material wears down over time, the sensor element eventually contacts the rotating brake rotor. That contact erodes the wire, changing its resistance and triggering the brake pad warning light in the instrument cluster — giving the driver advance notice to service the brakes before damage to the rotor surface occurs. The sensor is a single-use component: once it has triggered the warning by contacting the rotor, the wire is destroyed and the sensor must be replaced together with the brake pads.

Common Symptoms of a Failing or Missing Brake Pad Wear Sensor

• Brake pad warning light illuminated with no other brake system fault
• Warning light that stays on after new pads were installed but the sensor was not replaced
• No warning light when pads are confirmed at or near minimum thickness
• Visible damage to the sensor wire or housing during brake inspection

When to Replace

Replace at every brake pad service — the sensor is a single-use component that must be renewed with every pad replacement. Never reinstall a used sensor. Always verify the replacement sensor matches the connector and wire length of the original before installation.

VIN Verification Required

Brake pad sensor part numbers vary by axle position, caliper type, and model year across Sprinter generations. Always verify by VIN before ordering. Contact us and we'll confirm fitment before you buy.

Fitment

• 2003–2006 Mercedes-Benz Sprinter 2500 / 3500 – T1N
• 2007–2009 Dodge/Mercedes-Benz Sprinter 2500 / 3500 – NCV3

✔ Replace at every brake pad service — single-use component
✔ Always verify axle position and VIN before ordering

Part Numbers

• Mercedes OEM: 2205401517 / A2205401517 / 220-540-15-17
• Cross-reference: 1645401017
• Manufacturer: Sadeca
• SKU: 2205401517S