COVID19 UPDATE - We are keeping a close eye on the current situation and in line with latest government guidance we will remain operational until further guidance clarifies otherwise. If you have any questions, concerns or wish to postpone please do give us a call on 03336000669. We do still have our self-tuning options available: for those vehicles which are supported.


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Dyno Developed Software & Unrivalled
Technical Support.


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An ECU Remap for your exotic car
can significantly improve your driving


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ECU Remapping your Turbo Diesel has
never been so easy. With improved power
and fuel economy one simple step away.


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Tuning your truck can improve your pulling
power and fuel economy. See how Celtic
Tuning can help you and your fleet.


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Towing power is essential for any
farmer. Improve the power and
fuel economy of your tractor with
an ECU Remap.


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Testimonial BMW Reviews

BMW 3 Series 330d 201 bhp

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Posted on 26th March 2020, 13:45

An old e46 Diesel with 300 HP :))))

Thank You very much. I'm very satisfied. So much Power



BMW Z4 35i (N54) 301 bhp

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Posted on 11th February 2020, 11:57

This is the third car I have had mapped by Celtic tuning and it's by far the best. The difference between stock and the modified vehicle is, in a word, outrageous. It's a completely different car.

I later had catless downpipes fitted and returned the car to Celtic for sensor deletion and another dyno run. Always happy with the service and advice offered, facilities are state of the art and you can watch your car on CCTV during the process.

Mark Butler

Plymouth, Devon, United Kingdom

BMW X5 xDrive40d 308 bhp

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Posted on 26th April 2019, 09:35

I've just completed a return trip to Vienna via Germany and Holland. Needless to say, the German autobahns with many unrestricted speed limits gave me a chance to test the capabilities of the re-mapping.

The additional power was very useful for competing with some of the "bully boy" tactics that German drivers with high powered cars used to try and intimidate other drivers - I could easily accelerate out of the way much to their surprise!

But, the best surprise for me was the return on mpg! I completed 1852 miles on the trip and returned 35.2 mpg. I generally cruised at 80 mph with occasional bursts of over 100 mph. Town and village driving was generally restricted to 25/30mph. The weather was reasonable with not too much rain and temperatures sometimes reached 22C but generally cooler about 12C. I had winter Pirelli flat run tyres on 18-inch wheels supplied by BMW which gave me quiet running and additional grip. Most of the trip was completed in the Eco Pro setting (2 wheel drive) with Comfort setting (4x4) when roads were wet or cold.

All in all very happy with what you have achieved for my BMW.


United Kingdom

Not an actual picture of the tuned car

Amazing outcome

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BMW 4 Series 435d 308 bhp Diesel

Posted on 8th December 2018, 15:17

Not an actual picture of the tuned car

One if the best thing I have done, so happy thatI did this, what a difference it has made, you canfeel the difference straight away andthe power it gains it’s just amazing from308BHP to 400MHP under 800NM of torque, the car feels so much smoothernow and they also said you get 10% increase offuel consumption but I haven’t managed tosee that yet because I am still lovingthe power the car has now.

I willhighly recommend them, I’mso happy I did this.


United Kingdom

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