Genuine Mazda Power Plant Frame Fastener Plain Washer • NA01-39-724

Genuine Mazda Power Plant Frame Fastener Plain Washer

Replacement Genuine Mazda Power Plant Frame fastener washer for Mazda MX-5 Mk1 NA and Mk2/Mk2.5 NB models.

The Power Plant Frame, commonly abbreviated to PPF, forms the rigid structural connection between the gearbox and rear differential. This plain washer is fitted beneath the corresponding PPF fastener head and spreads the clamping load across the frame mounting surface.

Correct washers help the PPF fasteners achieve an even and secure clamping load without damaging or locally distorting the mounting surface. A missing, heavily corroded or deformed washer should be replaced whenever the associated hardware is renewed.

Three washers are used across the Power Plant Frame fastener positions on each vehicle. This listing supplies one Genuine Mazda washer, so order a quantity of three when renewing the complete set.

• Part type: Plain mounting washer
• Common names: PPF washer / Power Plant Frame bolt washer / frame fastener washer
• Mazda catalogue description: Washer, Plain-Frame
• Location: Power Plant Frame mounting fasteners
• Function: Distributes fastener clamping load across the PPF mounting surface
• Quantity fitted per vehicle: 3
• Quantity supplied: 1 washer
• Mounting bolts included: No
• Power Plant Frame included: No
• Gearbox or differential hardware included: No
• Brand: Genuine Mazda
• Part No.: NA01-39-724
• MX-5 fitment: All Mk1 NA and Mk2/Mk2.5 NB models

Typical reasons for replacement:

• Washer heavily corroded
• Washer distorted or dished by previous tightening
• Original washer missing
• Washer damaged during seized-fastener removal
• Power Plant Frame removal or replacement
• Gearbox or differential removal
• Renewal of the complete PPF fastener set
• Previously fitted incorrect or undersized washer

Quantity advice: Three washers are required for the complete Power Plant Frame fastener arrangement. This listing supplies one washer per order quantity.

Fitment advice: This washer fits the Power Plant Frame mounting system used across Mk1 NA and Mk2/Mk2.5 NB models. Identify all fasteners being removed and order the corresponding quantity of replacement washers.

Replacement advice: Inspect the corresponding PPF bolts, threaded mounting points, stepped spacers and frame mounting surfaces. A replacement washer will not correct stretched fasteners, damaged threads, elongated apertures or a distorted Power Plant Frame.

Alignment advice: The Power Plant Frame controls the relative alignment of the gearbox and differential. Preserve or restore the specified alignment before fully tightening the mounting hardware, as incorrect positioning can contribute to drivetrain vibration or mounting stress.

Other items to consider: Inspect all PPF mounting bolts, the upper stepped spacer, lower mounting bracket, gearbox mounting, differential mounting points and surrounding fasteners.

Useful tools / consumables: Socket and spanner set, calibrated torque wrench, penetrating fluid, wire brush, thread-cleaning tools, drivetrain support equipment and suitable measuring equipment for PPF alignment.

Difficulty guide: DIY Difficulty: Moderate. Washer replacement itself is straightforward, but PPF removal and reinstallation require the drivetrain to be safely supported and correctly aligned.

Why Genuine Mazda? Genuine Mazda washers match the original outside diameter, inside diameter, thickness and material specification. Correct washer dimensions help distribute the intended fastener load without interfering with the surrounding PPF mounting geometry.

What’s in the box: One Genuine Mazda Power Plant Frame fastener plain washer, part number NA01-39-724.

Installation notes: Safely support the gearbox, differential or Power Plant Frame before loosening the associated fasteners. Remove the original washer and inspect the bolt, threads and mounting surface. Position the new washer flat beneath the correct fastener head and ensure it is not trapped at an angle. Reassemble the PPF hardware, restore the specified gearbox-to-differential alignment and tighten the fasteners using the applicable Mazda procedure.