This episode is sponsored by Castrol and The Race Group. To learn more about Castrol Service, please visit: https://www.castrol.com/en_gb/united-kingdom/home.html

From five-star hotels to fault-finding on the road, this episode dives into the journey of Cathal, better known as The Car Nerd. He didn’t take a traditional path into the trade. After starting in hospitality, Cathal moved into car sales, then built a van business from the ground up. But it was diagnostics — not sales — that truly sparked his interest.

We talk about the early days working out of a small yard, how he taught himself remapping, and why he focused on professionalism from the start. From mobile tuning to opening his own workshop, Cathal now runs a growing diagnostics and performance business in Northern Ireland, backed by a Top Gear Tuning franchise and a commitment to doing things the right way.

Whether you’re in the trade or just curious about what it takes to build a business like this, Cathal’s story is full of insight, hard-earned lessons, and practical advice.

Timestamps:

00:00 – Introduction

02:25 – How did Cathal get started?

27:50 – What drives him to keep pushing forward?

50:17 – A deep dive into diagnostics

01:04:22 – What’s next for The Car Nerd?

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