Genuine Mazda Alternator Mounting Bracket Bolt – 1.6 • 99794-1260

Genuine Mazda Alternator Mounting Bracket Bolt – 1.6

Replacement Genuine Mazda alternator mounting-bracket bolt for Mazda MX-5 Mk1 NA models fitted with the early 1.6-litre B6 petrol engine.

This flange bolt is used to secure the main alternator mounting bracket to the engine block. The bracket supports the alternator and provides the fixed mounting structure for the alternator pivot and drive-belt adjustment system.

Secure attachment of the bracket is essential for maintaining correct alternator alignment and drive-belt tracking. A loose, corroded or damaged mounting bolt can allow bracket movement, make belt adjustment difficult or contribute to drive-belt noise and premature wear.

Two bolts are used to secure the alternator mounting bracket to the engine. This listing supplies one Genuine Mazda bolt, so order a quantity of two when renewing both bracket-to-engine fasteners.

Important fitment restriction: 99794-1260 is confirmed for the original early Mk1 NA 1.6 alternator mounting arrangement. Later 1.6, Mk1 1.8 and Mk2/Mk2.5 installations may use different brackets or mounting hardware.

• Part type: Alternator mounting-bracket flange bolt
• Common names: Alternator bracket bolt / bracket-to-block bolt / alternator mounting fastener
• Location: Alternator mounting bracket to engine block
• Engine application: 1.6-litre petrol engine
• Primary engine code: B6-ZE
• Function: Secures the alternator mounting bracket to the engine
• Quantity fitted per vehicle: 2
• Quantity supplied: 1 bolt
• Alternator mounting bracket included: No
• Alternator pivot bolt included: No
• Adjuster block or adjuster bolt included: No
• Alternator included: No
• Brand: Genuine Mazda
• Part No.: 99794-1260
• MX-5 fitment: Early Mk1 NA 1.6 models

Typical reasons for replacement:

• Original bolt heavily corroded or seized
• Bolt head rounded during removal
• Threads damaged or cross-threaded
• Bolt bent, stretched or fractured
• Original fastener missing
• Alternator mounting-bracket replacement
• Engine rebuild or ancillary-component refurbishment
• Previously fitted non-standard hardware

Fitment advice: Confirm that the vehicle retains the original early Mk1 1.6 alternator bracket and adjustment arrangement. Aftermarket alternators and later bracket conversions can use different lower mounting and adjustment hardware.

Quantity advice: Two bolts secure the alternator mounting bracket to the engine. This listing supplies one bolt per order quantity.

Replacement advice: Inspect both mounting bolts, the alternator bracket and the threaded engine-block mounting points. A new bolt will not correct damaged female threads, a cracked bracket or distorted mounting surfaces.

Other items to consider: Inspect the alternator pivot bolt, adjuster spacer block, tension-adjustment bolt, associated nuts and the alternator and water-pump drive belt. Check the bracket carefully for cracking or elongated mounting holes.

Useful tools / consumables: Socket and spanner set, calibrated torque wrench, penetrating fluid, wire brush and suitable thread-cleaning tools.

Difficulty guide: DIY Difficulty: Easy to Moderate. Access is generally straightforward, although corrosion or damaged engine-block threads can make removal and repair more involved.

Why Genuine Mazda? Genuine Mazda mounting hardware matches the original thread specification, bolt length, flange profile and strength requirements. Correct hardware helps maintain bracket alignment and the required clamping force against the engine.

What’s in the box: One Genuine Mazda alternator mounting-bracket bolt, part number 99794-1260.

Installation notes: Disconnect the battery before working around the alternator. Support the alternator and bracket before loosening the mounting hardware. Remove the original bolt and inspect the bracket and threaded engine-block aperture. Clean the threads and start the replacement bolt by hand to prevent cross-threading. Ensure the bracket is seated correctly against the engine, then tighten both bracket fasteners progressively to the applicable Mazda specification. Reassemble the alternator mounting and adjustment hardware, set the drive-belt tension and confirm correct belt alignment.