Wagner Brake MX31 Disc Brake Pad Set - Rear

Wagner ThermoQuiet MX31 Rear Brake Pads

Wagner Brake ThermoQuiet MX31 disc brake pad set is built for rear applications on select Mercedes-Benz and Volvo vehicles. It combines a semi-metallic friction formula with slotted, chamfered pads and integrated shims to support quieter braking and consistent pedal feel.

Key Features

• Zero-copper friction formulation
• Integrally Molded Insulator (IMI) technology for reduced brake noise
• Semi-metallic friction material
• Slotted design with chamfered edges
• Pad shims included
• Outer and inner pad friction material thickness: 0.585
• FMSI number: 736-D31
• Pad wear sensor not included
• Abutment clips not included

Product Details

The ThermoQuiet line focuses on quieter operation through Wagner Brake’s IMI technology, which helps isolate vibration at the pad. The MX31 uses a semi-metallic friction composition and a slotted profile to support stable braking performance in rear disc brake applications. This part number is used on select Mercedes-Benz 300SE, 350SD, 350SDL, 420SEL, 560SEC, 560SEL, 560SL, 300SDL, 300D, 300TD, and 300SD models, as well as Volvo 740, 745, 760, 780, 940, and GLE rear brake setups.

This part cross-references Raybestos Brakes PGD31BM for the same application.

What It Helps Address

• Brake squeal from worn or noisy rear pads
• Uneven braking feel caused by aged friction material
• Reduced stopping consistency from worn pad surfaces
• Noise transfer at the caliper interface
• Rear pad replacement needs on select Mercedes-Benz and Volvo vehicles

Installation Notes and Tips

Verify rear axle fitment by year, model, and chassis notes before installation. This MX31 application includes vehicles such as 1994 Volvo 940 rear, 1988-1991 Mercedes-Benz 300SE rear, and 1977-1981 Mercedes-Benz 300D rear with chassis-specific requirements. Inspect rotors, caliper hardware, and guide surfaces before fitting new pads, and confirm the pad shape matches FMSI 736-D31.

Quality Assurance

Wagner Brake ThermoQuiet pads are engineered with a zero-copper friction formulation and IMI noise-control technology for consistent, quieter rear braking performance. The MX31 is built to OE-style fitment standards for the listed Mercedes-Benz and Volvo rear brake applications.