RIDEX Rear Right Brake Caliper – MX-5 Mk1 NA / Mk2 NB Standard Brakes • 78B1063

RIDEX Rear Right Brake Caliper – 78B1063

Brand-new replacement rear right brake caliper for Mazda MX-5 Mk1 / NA 1.6 and 1.8, Mk2 / NB 1.6 and 1.8, and Mk2.5 / NB-FL 1.6 and 1.8 petrol models (1990–2005) fitted with the corresponding standard rear braking system.

RIDEX 78B1063 is a cast-iron rear brake caliper designed for installation on the right-hand side of the rear axle, corresponding to the driver's-side rear wheel on UK right-hand-drive Mazda MX-5 models.

The brake caliper forms an essential part of the vehicle's hydraulic braking system, converting brake fluid pressure into the mechanical force required to apply the brake pads against the brake disc.

When the brake pedal is pressed, hydraulic pressure moves the caliper piston, bringing the brake pads into contact with the rotating disc to generate friction and slow the vehicle.

The rear brake caliper also incorporates an integrated mechanical parking brake mechanism, allowing the rear brakes to hold the vehicle securely when the handbrake is applied.

During normal driving, rear brake calipers are exposed to repeated braking forces, changing temperatures, moisture, road salt and contamination. Over time, these conditions can contribute to corrosion, deterioration of hydraulic seals and restricted movement of the caliper or parking brake mechanism.

A sticking or seized rear brake caliper can cause excessive brake drag, uneven pad wear, increased brake disc temperatures and premature deterioration of the braking components.

Hydraulic seal damage may also lead to brake fluid leakage, affecting braking performance and requiring repair or replacement of the caliper.

RIDEX 78B1063 provides a brand-new replacement caliper incorporating a 32mm hydraulic piston and an integrated mechanical handbrake mechanism.

The caliper is manufactured from cast iron and is designed for the corresponding Mazda rear braking system using 9mm-thick solid rear brake discs.

Its 124mm mounting bore spacing corresponds to the original rear caliper installation arrangement on compatible Mazda MX-5 models.

The brake caliper is suitable for vehicles using the standard rear braking system with either 231mm or 251mm nominal rear brake discs, depending on the model and original braking configuration.

The caliper is supplied without the separate mounting carrier and is designed to operate with the compatible carrier and associated brake components.

Unlike a remanufactured or reconditioned caliper, RIDEX 78B1063 is supplied brand new, providing a complete replacement caliper for rear braking system repairs and refurbishment.

This product is suitable for compatible Mazda MX-5 Mk1 / NA, Mk2 / NB and Mk2.5 / NB-FL models equipped with standard rear brakes. Vehicles fitted with the larger Mk2.5 Sport braking system require different rear brake calipers.

Key Features & Benefits

• Brand-new replacement rear right brake caliper
• Suitable for compatible Mazda MX-5 Mk1 / NA and Mk2 / NB models
• Rear right installation – UK driver's side
• Single-piston hydraulic brake caliper
• 32mm brake caliper piston diameter
• Integrated mechanical parking brake mechanism
• Durable cast-iron construction
• Designed for standard rear brakes with 9mm-thick solid discs
• Compatible with corresponding 231mm and 251mm rear brake disc arrangements
• 124mm caliper mounting bore spacing
• Suitable for replacing seized, leaking or damaged original rear calipers
• Brand-new construction – not remanufactured or reconditioned
• Replacement for corresponding Mazda original equipment rear right brake caliper applications

Product Specifications

• Product type: Rear brake caliper
• Fitting position: Rear axle, right-hand side
• UK vehicle position: Rear driver's side
• Caliper design: Single-piston caliper with integrated parking brake
• Piston diameter: 32mm
• Material: Cast iron
• Compatible brake disc thickness: 9mm
• Mounting bore spacing: 124mm
• Mounting carrier: Not included
• Vehicle compatibility: Mazda MX-5 Mk1 / NA, Mk2 / NB and Mk2.5 / NB-FL with corresponding standard rear brakes
• Quantity supplied: 1 rear right brake caliper
• Condition: Brand new
• Brand: RIDEX
• Manufacturer Part Number: 78B1063
• EAN: 4059191911936

Fitment Advice: Designed for the rear right-hand side of Mazda MX-5 Mk1 / NA and Mk2 / NB models using the corresponding standard rear brake caliper arrangement. The caliper is suitable for standard 9mm-thick solid rear brake disc applications. Vehicles fitted with the larger 276mm Mk2.5 Sport rear brake system require a different caliper.

Important: This product is supplied as one rear right brake caliper without its mounting carrier. The corresponding RIDEX rear left brake caliper is part number 78B0937.

Signs of a Failing Rear Brake Caliper: A sticking or seized piston, brake fluid leakage, excessive brake drag, uneven brake pad wear, unusual heat from the rear wheel, reduced braking performance or poor handbrake operation.

Other Items to Consider: Rear brake discs, rear brake pads, brake caliper mounting carriers, slider pins, flexible brake hoses, brake fluid, handbrake cable components and associated mounting hardware.

Useful Tools / Consumables: Vehicle lifting equipment, axle stands, socket and spanner set, brake hose tools, calibrated torque wrench, brake bleeding equipment, brake fluid collection container and suitable brake cleaning products.

Difficulty Guide: Moderate to Advanced. Installation involves removing the original caliper, disconnecting and reconnecting the hydraulic brake system, reconnecting the handbrake mechanism and bleeding and adjusting the rear brakes. Professional installation is recommended.

Why RIDEX? RIDEX supplies aftermarket braking and vehicle maintenance components designed for the replacement of worn or damaged original parts. The 78B1063 offers a brand-new rear brake caliper incorporating the parking brake mechanism, providing a practical alternative to rebuilding an ageing original caliper.

What's in the Box: 1x RIDEX 78B1063 Rear Right Brake Caliper with integrated parking brake mechanism. Supplied without the caliper mounting carrier.

Installation / Service Notes: Follow the applicable Mazda rear brake caliper replacement procedure. Safely raise and support the vehicle before removing the rear right wheel. Release the parking brake and inspect the existing caliper, brake disc, brake pads, flexible brake hose, mounting carrier and handbrake cable for wear or damage. Disconnect the parking brake cable from the caliper as required and carefully disconnect the hydraulic brake hose, collecting any escaping brake fluid. Remove the original caliper and inspect the reusable mounting carrier, slider components and mounting hardware. Clean the mounting surfaces and install the replacement RIDEX caliper using the appropriate components and manufacturer-specified tightening torques. Reconnect the flexible brake hose using the correct sealing arrangement and refit the parking brake cable. Install compatible brake pads and confirm that the caliper operates freely. Refill and bleed the hydraulic braking system using brake fluid meeting Mazda's requirements. Set the rear brake piston and parking brake adjustment using the applicable workshop procedure. Inspect all hydraulic connections for leaks and ensure the brakes apply and release correctly. Restore normal brake pedal travel before moving the vehicle. Refit the wheel, tighten the wheel nuts to the prescribed torque and carry out a controlled road test followed by a final braking system inspection.