Genuine Mazda Battery Clamp Bolt / Hold-Down Fastener • 0243-56-231

Genuine Mazda 0243-56-231 Battery Clamp Bolt / Hold-Down Fastener

Replacement Genuine Mazda battery clamp bolt for Mazda MX-5 Mk3, Mk3.5 and Mk3.75 NC models from 2006 to 2015 listed in the compatibility table.

This threaded fastener forms part of the engine-bay battery hold-down assembly. It works with the battery retaining clamp to secure the battery firmly in its tray and prevent unwanted movement while the vehicle is being driven.

The bolt is fitted vertically beside the battery and passes through the retaining clamp assembly. There are typically two clamp bolts fitted per Mazda MX-5 NC. This listing is for one Genuine Mazda bolt.

Battery clamp bolts are commonly replaced when the original threads become corroded or damaged, the fastener becomes bent, or the bolt is lost during battery replacement. A loose or incomplete retaining assembly can allow the battery to move and place unnecessary strain on the terminals, cables and surrounding components.

• Part type: Battery clamp bolt / hold-down fastener
• Primary use: Secures the battery retaining clamp and holds the battery firmly in its tray
• Location: Engine-bay battery compartment
• Position: Battery retaining clamp assembly
• Quantity per vehicle: 2
• Quantity supplied: 1 bolt
• Brand: Genuine Mazda
• Part No.: 0243-56-231
• Also referenced as: 024356231 / 243-56-231 / 0370-70-985A / GA5R-56-034A / T001-56-034
• Fitment note: Suitable for the original battery retaining assembly on confirmed Mazda MX-5 Mk3 NC applications

Fitment advice: Two bolts are normally required to secure the original MX-5 NC battery clamp, but this listing supplies one. For imported, modified or previously repaired cars, matching the original battery tray, retaining clamp and fastener arrangement is recommended.

Other items to consider: When changing this part, you may also want to consider purchasing the main battery retaining clamp, a second clamp bolt, the associated nuts and washers, battery tray, terminal covers or other corroded battery mounting hardware.

Useful tools / consumables: Socket set, spanners, penetrating fluid, wire brush, protective gloves, eye protection, battery-terminal cleaner and suitable corrosion-protection treatment for the battery tray and mounting hardware.

Difficulty guide: DIY Difficulty: Easy. The fastener is accessible from the engine bay using basic hand tools. The retaining clamp should be tightened evenly so the battery is secure without placing excessive pressure on the battery casing.

Why Genuine Mazda? Genuine Mazda battery mounting fasteners are designed to match the original thread, length, retaining clamp and battery tray arrangement. Using the correct OE fastener helps maintain secure battery positioning, suitable terminal clearance and compatibility with the surrounding electrical components.

What’s in the box: One Genuine Mazda battery clamp bolt / hold-down fastener, part number 0243-56-231.

Installation notes: Switch off the ignition before working around the battery. Remove corrosion or debris from the battery tray and retaining components, position the battery and clamp correctly, and install the bolt through the original mounting point. Tighten the battery clamp evenly and confirm that the battery cannot move, taking care not to overtighten the fastener or distort the battery casing.