Standard Ignition PWS133 Disc Brake Pad Wear Sensor - Front

Brake Pad Wear Sensor for BMW Front Applications

Standard Ignition PWS133 is a disc brake pad wear sensor for front brake caliper mounting locations. It monitors brake pad wear and provides a direct replacement solution for select BMW 840Ci, 850Ci, and 850CSi models.

Key Features

• Disc brake pad wear sensor for front brake systems
• Mounts at the brake caliper
• Female connector with round connector shape
• 7.75-inch harness length for the listed applications
• Male pin terminals with 2-terminal configuration
• Standard Ignition PWS133 replacement part

Detailed Description

Standard Ignition PWS133 is built as a brake pad wear sensor for front-position BMW applications that use a caliper-mounted sensor. It features a female connector, round connector shape, and a 7.75-inch harness length, with male pin terminals for the specified connection style. This part cross-references Monroe Shocks & Struts (e.g., 34351181823) for the same application. Use PWS133 when replacing a worn or damaged sensor on BMW 840Ci, BMW 850Ci, or BMW 850CSi front brake systems.

Fits 1994-1997 BMW 840Ci, front. Fits 1993-1997 BMW 850Ci, front. Fits 1994-1995 BMW 850CSi, front.

What It Helps Address

• Brake pad wear warning light staying on
• Broken or damaged pad wear sensor wiring
• Faulty sensor connection at the brake caliper
• Intermittent brake pad wear indicator readings
• Replacement needs after brake service on the front axle

Installation Notes and Tips

Install the sensor at the brake caliper and verify the connector style, terminal layout, and harness length match the vehicle’s original setup. Confirm front-axle application before installation on BMW 840Ci, BMW 850Ci, and BMW 850CSi models. Inspect the routing path so the harness is not stretched, pinched, or exposed to brake component contact.

Quality Assurance

Standard Ignition supplies replacement electrical and sensor components for service applications. PWS133 is listed with defined connector, terminal, and mounting specifications to support accurate part selection for the stated BMW front brake fitments.