The Brembo brake pad wear sensor for 2011–2013 BMW 135i models monitors brake pad thickness electronically and notifies the driver when pads are at minimal serviceable thickness. Made to OE specifications to match original sensor performance, it uses durable wiring and connectors to resist high heat and harsh weather. Brembo recommends replacing the sensor whenever brake pads are replaced to maintain reliable warning accuracy.
Brembo OE 11-13 BMW 135i Wear Indicator