Contact Details

Our workshop hours are 9:00am to 5:00pm Monday to Friday
With a large workshop of about 3,000 square feet and a comfortable air conditioned customer lounge we welcome customers visits to discuss their requirements and to offer helpful and friendly advice.
We are happy to book an appointment for your car at a time that is convenient to you.
We are quite unique in the way that we operate which means that we are normally able to fit your car in the same or next day, which is particularly useful if you have an problem with your vehicle that needs our urgent attention.

Worldwide Mail Order Service

Delivering a Worldwide postal service for BeCM, BCU, CJB, Steering Column Repair for Land Rover/Range Rover and ECU and TCU Cloning, Engine and Gearbox Remaps for Most Makes and Models.

Call us now on 01442 601027

Call Eric on 01442 601028 or Elliot on 01442 601027 if you would like to speak with us or to arrange to bring your car to our workshop, we will be happy to help you.

Turner Performance & Diagnostics Ltd
10 Manor Avenue
Hemel Hempstead 

We are currently experimenting with using a mobile number as our main contact point, this is due to the fact that the majority of our calls from customers are from mobile phones and the ability to call a mobile number (in our case an o2 number) means that for most people it is free or included in your tariff, this means that we are saving our customers the cost of making a mobile to land line call. If you have any feedback for us on this trial we would be pleased to hear from you.