Genuine Mazda Brace Bar / Strut Flange Nut • 9994-00-803B

Genuine Mazda 9994-00-803B Brace Bar / Strut Flange Nut

Replacement Genuine Mazda flange nut for Mazda MX-5 Mk3, Mk3.5 and Mk3.75 / NC models with 1.8L and 2.0L petrol engines from 2005 to 2015 listed in the compatibility table.

This fastening nut is used on brace-bar, strut-brace and associated chassis assemblies. Its integrated flange provides a wider load-bearing surface than a conventional plain nut, helping spread the clamping force across the adjoining bracket or brace mounting point.

Correct fastening hardware is important for keeping the brace securely attached to the vehicle structure. A damaged, loose or incorrect nut can reduce the clamping force and may allow movement, vibration or rattling around the brace assembly.

This listing supplies one Genuine Mazda flange nut. Several may be used across the vehicle, and the exact quantity required depends on the brace or chassis component being installed or repaired.

Replacement may be required where the original nut has become corroded, rounded, cross-threaded, damaged, lost or unsuitable for reuse after removal.

• Part type: Flanged fastening nut
• Primary use: Secures brace-bar, strut-brace or associated chassis components
• Location: Chassis brace or structural mounting assembly
• Vehicle application: Mazda MX-5 Mk3, Mk3.5 and Mk3.75 / NC
• Engine applications: 1.8L L8-DE and 2.0L LF-VE
• Transmission applications: Manual and automatic
• Quantity per vehicle: Application-dependent
• Quantity supplied: One flange nut
• Brand: Genuine Mazda
• Part No.: 9994-00-803B
• Also referenced as: 999400803B

Fitment advice: This nut is used on NC-generation brace and chassis assemblies, but the precise installation point and number required depend on the component being fitted. Compare the original nut, thread size, flange diameter and adjoining bolt or stud before installation.

Other items to consider: When replacing this part, you may also want to consider purchasing the corresponding brace mounting bolt or stud, washers, mounting brackets and any other brace fasteners showing corrosion, damaged threads or rounded heads.

Useful tools / consumables: Correct-size socket or spanner, extension bar, penetrating fluid, thread-cleaning brush and calibrated torque wrench.

Difficulty guide: DIY Difficulty: Easy to Moderate. Installation is normally straightforward once the relevant brace mounting point is accessible. Underbody brace applications may require safe lifting and support of the vehicle.

Why Genuine Mazda? Genuine Mazda fastening hardware is manufactured to the intended thread, flange and strength specification for the original assembly. Using the correct OE nut helps maintain secure clamping and compatibility with the original Mazda mounting bolt or stud.

What’s in the box: One Genuine Mazda brace-bar / strut flange nut, part number 9994-00-803B. The mounting bolt, stud, washer, brace and brackets are not included unless specifically shown or stated separately.

Installation notes: Inspect and clean the mating bolt or stud threads before installation. Replace any adjoining fastener with damaged or heavily corroded threads. Start the nut by hand to avoid cross-threading, seat the flange squarely against the mounting surface and tighten to the specification applicable to the brace assembly.