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Stainless Steel Gearbox Fill Plug

to suit MX-5 NA / NB

$24.95 AUD

In Stock · Ships in 24 Hours
Max Available:
Overview

Many MX-5 enthusiasts are aware that the original equipment manufacturer (OEM) fill plug on an NA/NB has a square head nut, and the corners often get rounded off due to over-tightening or regular wear and tear, as it is made of mild steel. The most effective way to loosen it is to use a plumber’s wrench, but this often damages the nut.

The HFM.Parts Gearbox fill plug is constructed from Stainless Steel 303 material and features a 17mm hex head design, which is slightly longer to facilitate easier removal.

Free AU shipping over $250
In-stock orders dispatched within 24 hours from Melbourne.
2-year warranty
Every part covered against defects from day one. We repair, replace, or refund — your call.
30-day returns
Faulty part? Free return, full refund. Changed your mind? Full store credit, no fees deducted.
Ships worldwide
International shipping available to most countries. Rates calculated at checkout.
In the box

What's Included

1x Stainless Steel Gearbox Fill Plug

Community

Customer Installs

Installs of this part — and similar parts in this category.

Product Information
Requirement: NA-NB 1989-2005 – 5 Speed Gearbox
Vehicle Years Requirements
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Our compatibility list is based on OEM specifications. Variations may exist due to vehicle sub-models or other factors — verify fitment before purchasing.

We have only confirmed fitment for the vehicles mentioned under compatibility. If your vehicle is not listed, then we don't know if it fits.

Our Story

We weren't always HFM.Parts; we were Holford Motors. Our brand's identity was forged not in an office, but on the local circuits in the high-stress world of competitive drifting. Our ultimate testbed was our Nissan S14 Drift car, driven by champion Luke Fink. Pushing that car to its limits exposed a crucial truth: achieving genuine, repeatable performance meant relying on components that simply weren't available affordably on the market.

The HFM.Parts brand was born

We made the commitment to design and manufacture the uncompromising, high-quality performance parts that we, as competitive racers, demanded ourselves. Every component you see is a solution conceived, tested, and proven by us. When you choose HFM.Parts, you are investing in components engineered by racers, for racers, ensuring your vehicle delivers its maximum performance potential.

From Our Customers

Be the first to review this product. Here's what other customers have been saying about our range:

  1. Massimo cee ✓ Verified
    Nov 20, 2023
    Installed this on my 22 brz. Have a chassis mounted shifter and this has made it much more smoother definitely recommend if installing a aftermarket shifter.
  2. Andrew ✓ Verified
    Feb 12, 2023
    It's a pivot ball, seems to be very well made, and feels heavier than the OEM one. The OEM one looks like the tip is slightly more round and circular than this one but it might be because it was worn out. Functionally it feels the same.
  3. Ben Gainfort ✓ Verified
    Jul 6, 2022
    Perfect part and fitment
  4. James Hobbs ✓ Verified
    Jun 21, 2022
    This little unit completely removed my clunk on gear changes under hard acceleration. It does transmit a small amount of gearbox noise but it's minimal and thats coming from someone that drives around with the exhaust silencers in :)
  5. melina r. ✓ Verified
    Oct 11, 2019
    Thanks for washers...
  6. Kyle K. ✓ Verified
    Sep 5, 2018
    First time using HFM to order parts and the part I ordered is working good, shipping was fast and with in the time frame they give me, it took 6 days to get to Canada

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Stainless Steel Gearbox Fill Plug to suit Mazda MX-5
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Modifying vehicles is a specialist task and requires the knowledge and experience of competent individuals to be conducted safely.
We recommend this product be installed by a competent person. Instructions are given with every order where available, however, If you would like a copy prior to ordering, you're welcome to contact us