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


Diesel Tuning - copy

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 Audi Reviews

Audi Q5 S Line Stage 1

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Audi Q5 2.0 TDI 170 bhp Diesel

Posted on 17th December 2020, 04:59

Wow. Where do I start?What a difference this has made to my vehicle, the low down power and the way it powers through the revs.The only regret I have is that I didn't do it sooner.Big thanks to KEVIN the technician, what a gent!And the guys at CELTIC TUNING.5 stars.



Newport, Gwent, United Kingdom

Not an actual picture of the tuned car

Audi A6 2.0 TDI Ultra 187 bhp

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Posted on 30th August 2018, 09:23

Not an actual picture of the tuned car

Highly recommended, the improvement on my Audi A6 S-Line Ultra is amazing, really pleased with remap and very noticeable gains, more than I expected, yet better fuel economy. Friendly staff and service was top quality.

Thanks to the team 👍

Andrew Stone


Newquay, Cornwall, United Kingdom


Check Audi Q5 stats

Audi Q5 2.0 TDI 170 bhp Diesel

Posted on 22nd June 2018, 14:59

Just had my Q5 tuned last week. It is like a new car. Much smoother and masses more pull from low revs.

Nice engineer took about 40 mins to upload it and tell me about the guarantee and how I could have it taken back to standard for free within 14 days. No chance. Best thing I have done to a car.

Early days yet but the computer is telling me we are getting more mpg too. Can't fault it.

Well done Celtic.

Peter Welburn

, Rossbuild

Kimcote Lutterworth, Leicestershire, United Kingdom

Not an actual picture of the tuned car

Audi A4 2.0 TDI CR 134 bhp Diesel

Posted on 20th June 2018, 15:53

Not an actual picture of the tuned car

My car has been remapped from 134bhp to the stage 1 at 206bhp and wow what a difference!! I am very pleased with the results!!

I only had a done a few days ago and can already notice a difference with the fuel consumption and the initial power response is greatly improved! Excellent customer service and very prompt and on time.

Overall I would rate Celtic Tuning very highly and would recommend to anyone wanting a good reliable service!!

Thank you


Poole, Dorset, United Kingdom

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