TDI Tuning Reviews 1,545

Fitted to my 2019 Cupra Alteca
Comes well packaged and Instructions are very clear and in theory it is easy to fit, only snag I found was one of the connections was at the underside of the engine at the bottom of the radiator and had to partially remove the undertray to reach the connection which was quite fiddley. Everything else was simple to fit.
I brough this to help with fuel Economy more than anything else, I spent quite a bit of time changing the modes (1-7) to see which brought the best results. For me mode 3 was best for Economy bring less than 30mph up to 35mph average on long runs.
Mode 7 seems to be nutcase mode where in Cupra and sport mode the thing takes off !!
Overall very impressed and would by again.

great product, that did make a significant difference to the performance of my VW Transporter (T6.1) i would defiantly recommend this to others, only niggly thing was i would say is its not easy to reach some of the connections, you had to fit them by touch as you could not actually see the fittings

Swapping my tuning box from a GR Yaris to a GR Corolla. Support was great and delivery of a new harness very prompt.

The team at TDI were extremely helpful and informative once we sorted couple of bugs out they were extremely responsive, 4 days for a package from England to my doorstep in Melbourne excellent service. And their product actually works very well, well done and thanks guys Geoff C

Great product and straight forward installation following the comprehensive instructions.

Excellent product. Easy to fit. Customer Services were very helpful. All round a good experience.

Great buying experience for my TDI tuning chip. Fast shipping to US. Extra care that was taken to validate I had the right chip for my vehicle since there are multiple configs. Smooth transaction and real performance gains from my car. App is easy to use can lag a little connecting via Bluetooth but all and all I would do it again. 5 stars

Excellent customer service, very knowledgeable and accommodating staff. The product is first class and transferable to various vehicles with minimal fuss and expense.

Great bit of tech. My car is transformed (Golf R) really amazing performance and improved fuel economy as a bonus….unless you use the full power available all the time! Torque improvements is noticeable and it makes the car even better than it already is.

I contact them (I cant remember the exact date now) to re-program my tuning box for another vehicle, and had a really great email and nothing was to much any trouble, on top of that I even got a discount. I received the box back very quickly and was surprised it was a completely new unit and wiring loom. After fitting I was amazed at the improvement in drivability and power, especially towing my caravan. top people, this is my second unit from them.

Quick supply , easy install guide & great results

Could have been a nice window sticker in the box !!

I had difficulty installing the sensor connection under the cooler matrix and cpu on my son’s 2016 Mercedes SLK 200. In truth - I couldn’t even see it - never mind safely disconnect/ reconnect. The connectors can be brittle.

Fortunately I live close enough to Chelmsford to have Chip perform the operation. He didn’t have to remove the interfering parts as described in the instructions which I had fretted with.

Problem resolved quickly and efficiently!

So pleased with my CRTD4 twin channel diesel tuning box, from the ordering process, installation and the results from the great plug-in tuning box.
It’s does everything it says on the tin and more.
I decided to give TDI tuning a try to improve the towing perform on my Fiat Fullback pick-up truck. For everyday use I set the box to level 4 and when towing level 7. Performance and fuel economy improve under both driving conditions; fuel economy even improves under DPF regen conditions!
Also, I’m a UK military veteran and on asking if TDI Tuning give UK military veterans a discount, l was given a free upgrade to the Bluetooth box and free delivery (they did ask for proof of service which l was happy to provide).
I highly recommend TDI Tuning!

I had an existing box on my 3 series BMW (2 years), which was absolutely amazing and completely faultless!
Luckily, the box was compatible with my new petrol Volvo XC60.
A quick call to the technical department and within 48 hours my car has its tune.
Superb service!!!

Very pleasant to do business with TDI Tuning. I contacted them directly via phone and the service was outstanding. I was able to get answers to my questions and with the information provided, place an order for my application. The shipping was provided free and the delivery was quick and on time. I have experienced an immediate and noticeable increase in performance with their product. It was the right choice for me with the support they provided.

The speed of the delivery was spot on and the product i received is absolutely spot on I've noticed and increase in my performance the only thing that has really stayed the same is my MPG

I replaced my current car make and model and required a new wiring harness. The process of ordering was simple and my Tunit box received updadted software over the air.
I had a little problem installing the new harness and contacted Technical Support who couldn't be more helpful and guided me on installing the new wiring harness. Great experience from start to finish.

Very helpful on the phone and arrived quickly. Unfortunately I can’t leave a review on how the product works as I installed it the day before we were due to drive to south of France and came out in the morning and the car had been stolen with the TDI tuner in it. To say I’m gutted is an understatement.

Great communication and excellent product. The tuner brought our 2025 Buick Envision to life! Amazing difference in power and the added increase in MPG is an extra little bonus...

Great company totally changed the performance of my car thanks to these guys. Thanks TDI Tuning keep up the good work.