Roll Bar Seat Belt Retraction Guide

The OEM seat belt guide mounted to my Hard Dog roll bar causes the belt to kink and not retract smoothly. I thought the Car Make Corn’s seat shoulder covers would help, and they do look cool and prevent the seat belt from being lost behind the seat, but they don’t help with retraction. Boss Frog used to make upgraded seat belt guides for their roll bars before they stopped production. Luckily, Izzy’s Metal Shop in Kirkwood, Missouri still makes replicas of the old Boss Frog design.

A dirty seat belt also causes uneven retraction, I tried cleaning it before opting for the upgraded belt guide, but it didn’t help in my case.

Replica seat belt guides from Izzy’s Metal Shop

Original seat belt guide mounted to hard dog roll bar

The old seat belt guide causes the belt to twist and catch as it retracts.

Mazda seat belt guide angle misaligned by roll bar
Seat belt tab mount bolt and spacer stack

The new seat belt guide has an opening large enough to slide onto the old belt, with the buckle tongue passing through. Definitely made sure to test this before destroying the original belt guide.

Passing the seat belt tongue through the new guide
Removing the old seat belt guide
Prepping to cut through the belt guide
The only way to remove the original belt guide is to cut it

It’s not necessary to unbolt the seat belt retractor or remove it from the car.

Started cutting the belt guide with a hacksaw

The hacksaw would have worked, but it was slow going.

Cutting the seat belt guide with an angle grinder
Slit cut in the seat belt guide
Prying open the slot for the belt to fit through

The belt guide steel is pretty springy, it’s easy to pry open and slide the belt out.

Izzy’s Boss Frog replica vs OEM seat belt guide
Reusing mounting hardware for the new belt guide
New belt guide mounted
Seat belt retraction before and after comparison

The before/after probably speaks for itself, but this replacement belt guide worked perfectly for me and now the seat belt retracts smoothly 👍

Installed Boss Frog replica seat belt guide
Roll bar seat belt guide
Waxing Car Make Corn’s seat belt shoulder guide

I also rubbed some paste wax into the Car Make Corn’s shoulder strap where the belt passes through. I don’t think it made much of a difference.

PartPrice
Izzy’s Metal Shop Miata Roll Bar Seat Belt Adapter (Boss Frog)$68

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