I had been looking for a company to re-map my E320 CDi and had heard from a friend that Diamond were not people who worked from the back of car and were contactable if you had a problem later. They actually had premises that were close to the City Centre as well and could offer me a collection and delivery service if needed.

My E320 Diesel showed a noticeable improvement in performance from the …bhp increase on the remap and has become more driveable as well as quicker and more economical in the process (by about 5mpg on a long journey). Diamond really seem to know what they are doing ?so much so that a friend has had his E320 Diesel re-mapped as has another with a VW Touareg.

Very pleased with the Re-Mapping, the Discovery performs far greater than ever before both MPG & Performance, hence would recommend it to anyone. I've passed on your details to Land Rover Off-Road Challenge.

You remapped my BMW 525d SE a few weeks ago. I wanted to wait until I could determine the fuel saving before I responded to you.

The increase in performance is incredible and immediately noticeable, and I am glad to say that the mpg have improved probably by about 4mpg. I am very impressed with the ease of the whole process and consider it good value for money.

I have an Astra estate CDTi and had it's ECU re-mapped for fuel economy. I have been monitoring the fuel consumption for a couple of months now: I have gained about 40 extra miles per tank (approx. 4 miles per gallon) for a mixed driving of 2/3 urban and 1/3 motorway. The car feels also more responsive; At around 2500 revs, the extra pulling power is very noticeable.
With the fuel price increase showing no stopping, it was the best thing I did towards reducing my fuel costs.
Thank you Diamond Performance.

I have a BMW 530d and was considering window tinting and ECU re-mapping, following careful research into suppliers and installers Diamond consistently came up on top. As such they carried out both upgrades to my vehicle to a standard that makes the car look and feel that it was made that way! Extremely pleased with the service and product and would highly recommend to anyone.

Hi Guys,
You did the re-map last week on the X5 M spec sport. What an incredible difference, amazing throttle response where the engine just wants to go and go. Worth every penny thankyou.