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Momo 42.8mm Mazda horn button preview

Files (2)

horn-object-Cut.stl
STL
1.0 MB
MOMO_Mazda_Horn_button-1.8mm-logo.stl
STL
1.1 MB

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Recommended filament for this print

Product references matched to the published material guidance. Confirm diameter, heat resistance, colour, and printer compatibility.

Referenced itemWhat to verifyPrice & availability
PETG filamentAmazon · Affiliate linkAmazon product page for 1.75 mm PETG; confirm colour, spool size, print temperature, seller, and delivery region.Check price at Amazon
ASA filamentAmazon · Affiliate linkAmazon product page for 1.75 mm ASA; use an enclosure and suitable ventilation, and confirm seller and regional availability.Check price at Amazon

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Knobs/Buttons

Momo 42.8mm Mazda horn button

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CC BY
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The file license permits commercial reuse, subject to any applicable attribution or share-alike terms. License status does not verify vehicle fitment, OEM rights, design patents, or safety.

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Description

This is a custom horn button I made for my RX7's Momo Nero steering wheel. It replaces the center horn button and brass dome insert. You will need to apply a layer of aluminum tape and two m6 washers to ensure proper electrical contact. The logo and horn symbols are raised 1.6 from the button surface and printed in PETG. This was also scaled down from 45 mm to 42.8 in order to fit inside the momo horn button assembly. It is strongly recommended that you use a caliper to measure the horn button you are replacing. I also included a horn symbol STL since the original Momo button has that symbol.

Compatible Vehicles

Published Jun 30, 2026Updated Aug 14, 2026

Originally published on thingiverse.com by John Cargo (jacargo) · License: CC BY

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