Genuine Mazda Brake Servo / Vacuum Brake Booster • N1Y3-43-80ZA

Genuine Mazda N1Y3-43-80ZA Brake Servo / Vacuum Brake Booster

Replacement Genuine Mazda brake servo for Mazda MX-5 Mk3, Mk3.5 and Mk3.75 / NC models from 2006 to 2015 listed in the compatibility table.

The brake servo, also known as the vacuum brake booster, uses engine vacuum to increase the force transferred from the brake pedal to the brake master cylinder. This reduces the pedal effort required and provides the power assistance expected from the vehicle’s braking system.

The servo is mounted on the engine-bay side of the bulkhead, between the brake-pedal linkage and brake master cylinder. This listing is for one Genuine Mazda brake servo, with one unit fitted per vehicle.

Replacement may be required where the original servo has developed an internal diaphragm or seal fault, restricted operation or a vacuum leak. Possible symptoms include a hard brake pedal, increased pedal effort, reduced power assistance, hissing or whooshing noises, or a change in engine idle when the brake pedal is pressed.

• Part type: Brake servo / vacuum brake booster
• Primary use: Provides vacuum-assisted braking force
• Location: Engine-bay side of the bulkhead
• Position: Between the brake pedal mechanism and brake master cylinder
• Quantity per vehicle: One
• Quantity supplied: One brake servo
• Brand: Genuine Mazda
• Part No.: N1Y3-43-80ZA
• Also referenced as: N1Y34380ZA
• Fitment note: Confirmed for Mazda MX-5 Mk3, Mk3.5 and Mk3.75 / NC applications shown in the compatibility table

Fitment advice: Match the original servo part number, mounting arrangement, master-cylinder interface and pedal-linkage configuration before installation. For imported, modified or previously repaired cars, matching the original component style is recommended.

Other items to consider: When changing this part, you may also want to consider purchasing the brake-servo vacuum hose, non-return valve, master-cylinder seals or grommets, fresh brake fluid and any corroded mounting nuts or pedal-linkage hardware.

Useful tools / consumables: Brake-pipe spanners, suitable socket and extension set, torque wrench, brake-fluid extraction equipment, line plugs, fresh brake fluid, brake cleaner and suitable equipment for bleeding the braking system.

Difficulty guide: DIY Difficulty: Advanced. Access is required from both the engine bay and pedal area. The brake master cylinder and pedal linkage must be handled correctly, and the braking system may require bleeding following installation.

Why Genuine Mazda? Genuine Mazda brake components are designed to match the original pedal linkage, master-cylinder mounting arrangement, vacuum connections and braking-system specification. Using the correct OE servo helps maintain proper brake assistance, pedal operation and compatibility with the surrounding Mazda braking components.

What’s in the box: One Genuine Mazda brake servo / vacuum brake booster, part number N1Y3-43-80ZA.

Installation notes: Protect surrounding paintwork from brake fluid and prevent contamination entering the hydraulic system. Inspect the vacuum hose and non-return valve before reassembly. Connect and adjust the pedal linkage in accordance with the Mazda workshop procedure, tighten all mountings correctly and bleed the brake system where the hydraulic circuit has been opened. Confirm correct servo assistance and brake operation before road use.