Turner Performance & Diagnostics Ltd

Remapping and Diagnostics Specialists

Unit 4, Apsley Business Centre, 233, London Rd, Hemel Hempstead, Hertfordshire, HP3 9SE Directions

Tel 07922 310396

Business overview

Remapping & Diagnostics Specialists Remapping for Performance, Economy or a combination We are able to find and fix problems that regular garages are unable to resolve

Turner Diagnostics

We are a family owned and run Specialist Diagnostics and Auto Electrician business with experience going back to the 1970's, Operating from a spacious 3000 square foot workshop in Hemel Hempstead, Hertfordshire with free parking for visiting customers. We regularly diagnose problems for trade customers, so we have lots of experience dealing with difficult and complex problems.

As diagnostic specialists we regularly repair faults that main dealers and other workshops have failed to fix.

The Diagnostic Specialists

We have specialist tools and expertise to perform better than dealer-level vehicle diagnostics on the vast majority of cars on the road today. We are not restricted to any particular make or model, for many manufacturers we have the same vehicle diagnostic tools as supplied to the dealers in addition to other specialist products

We have a huge range of specialist equipment that allows us to find and repair all manner of faults on any make or model

Products & Services


car air conditioning

car diagnostics

car engine tuning & conversion

diesel engineers

Petrol & Diesel Remap

diesel fuel injection

engine diagnostics

fuel injection

fuel injection adjustment

fuel injection engineers

lost car keys

petrol engines

engine rebuilds

garage services

wheel alignment

vehicle tracking

van repairs

unleaded engine conversions


steering adjustment

springs & shock absorbers

rolling roads

online booking

oil change

motorcycle repairs & services


gear boxes

cylinder heads