435d xdrive convertible. I ordered my tuning box on a Tuesday afternoon and it arrived 2 days later. After fitting the box I took the car out for a test drive (after the 40 miles run in) and selected setting 7 via the bluetooth which is a must. You can really notice the difference, it kicks down quicker and the acceleration definitely has more punch. It was a quick car anyway but to buy yourself half a second 0-62 mph for £352 is a bargain in my opinion. I had to contact the team at TDI Tuning to ask them their advice and they were really helpful, if I emailed them they got back to me right away. Overall I highly recommend.

I’ve really noticed the difference with throttle response and the higher end of the revs. On my Leon 2.0 tdi 184ps a nice little add on and I got 20% off too!!

Got a chip for my mk7 GTI a few months back excellent service. Completely transformed the car, so much more responsive and the torque even in low-medium rpm is fantastic would definitely recommend

Installed in my 2013 Porsche Cayenne today, and the difference is amazing. Literally no lag now, so much more responsive and honestly like a different, better car to drive now. Fitted in literally 10 minutes. The Bluetooth connectivity is a great feature. Switch between better mpg of bhp on the app. No need to open the bonnet every time. Gonna order one for the wife’s Merc 350 Coupe, as I’m so impressed by it. You won’t be disappointed. 👌🏼

Great 14mpg even at full power level 7 went from 46mpg to over 60 on my 2006 2.0tdci mondeo. You can feel a difference in power as well

Just fitted my tuning box for my Discovery 5. After a quick phone call for help, it’s AMAZING! Thank you. Great product and support

Their first class with installation very helpful with information on how the upgrade works and the performance it gives the vehicle.

Jaguar XE 20D I am not interested in 0-60 or top speeds but more mid range torque and that 30-80 lane changing and overtaking grunt The jaguar already has a good amount but the box has definitely improved with the car less likely to change down gears but using the obvious extra low down pull

I have just completed fitting the twin channel b/t box to my civic 1.6 diesel. Even though it is only in mode 4,i can feel an immediate difference. Smoother,more responsive acceleration and a noticeable difference in torque,it has transformed the drive. It wasn’t too hard to fit,but my engine bay is cramped with limited room,so i probably took longer than i should to install it. I highly recommend these tuning boxes and communicating with the tdi guys,has been an absolute pleasure.

Purchased a TDI box from a friend, there was no guidance manual. However gave ‘TDI Tuning’ a call and these guys were extremely helpful. Trust these guys, this box will make a massive difference to your motor. You will potentially save money on fuel and the performance will exceed all expectations! Thank you TDI Tuning👍🏻

Ordered the TDI tuning box over Christmas and love it!! Transformed the 100% 👍🏻👍🏻

Went there today after having issues with my box from another supplier. sorted really quickly for me. Quality customer service very friendly. 100% recommend them.

Amazing tuning box, fast delivery easy to install, took a while for it bond with my car maybe due to me not running it in properly. The difference now is crazy it pulls so hard and the power delivery is so much smoother, I’m Loving it fully recommend this!!

Just had my 2015 Volkswagen golf tdi sel tuned. what a difference. much more power. Engine runs really smooth, MPG went up 25%. I was so impressed that I ordered the pedal box. WOW, the response is awesome. So with the tune and pedal box and the super custom service. Alistair and Mason answered all my questions and I had a lot. I wouldn't purchase from anyone else. Cliff Louaillier. USA, Virginia.

Went to Tdi for fitting of the Bluetooth version to my Peugeot. Was a bit sceptical from stuff ive seen online about tuning boxes. But the mpg gains from this, the difference in power and torque it pulls like a train. Customer service from them is great! Definitely recommend.