Offered a used CTRD4 tuning box, quick email to TDI Tuning and a rapid response informed me they can be reprogrammed to suit my car. Bought, boxed up and sent off on 3/6/20 it was back on my doorstep 5/6/2020 reprogrammed and a loom to fit my car, that is impressive service!

Great product and great guys to deal with! Just fitted my tuning box to my 2019 Seat Leon Cupra and the difference is massive, so much more useable power in the lower rev range! The box was a bit of hassle to fit but that's more Seat's fault that anything else. Would highly recommend!

well after alot of research on tuning boxes I decided to go with the Tdi.tuning box. the car felt different straight away it pulls and pulls and today in setting 7 my Gtd mk7 just changed ... well impressed so far😊

Fitted a box to my s4 3.0 supercharged. After driving it and changing through the modes from fuel saving to mode 7 it is a big performance difference and it maintains even power through the rev range.

Just fitted my Bluetooth box to my Range Rover Evoque and what a difference its like a rocket for a big car really impressed I'm just waiting on a response for a peddle box purchase top work guys 😘

Finally fitted the TDI Tuning box to my M4 comp pack and it makes quite a difference, not just to how quick the car is (and it’s scary fast now), but to how the power is delivered, it’s hard to explain but it’s like constant boost. It’s like the turbos don’t lag at all it just pure unadulterated power from the off set. I launched it and I reckon the 62 sprint was about 3.5, I’d say quicker but it still has that initial traction issue as all powers hitting the rears (obviously not the boxes fault). I’ve never shy’d from keeping the foot down in the past but today I had to back off as it was too fast and also people are walking round places they never walk which is a pain when you want to open up a little on roads you can, but hey ho. Got to say tho I’m very impressed. I’m yet to test fuel consumption but I can only do that when everyone’s back at work and I’m stuck in traffic otherwise it’s not a fair comparison. Still if I’m being honest fuel consumption was not the main reason for getting one 😜

Bought the system for my FOCUS RS MK3 , with the Bluetooth variation. As simple as described to fit, just a tiny bit tricky with the boost 2 cable due to the position in the engine bay but way worth the hassle with the result . Feels much more responsive and can happily claim around 410BHP now ! Very satisfied.

fitted my tuning box in my 06 plate transit connect with 111000 miles on the clock. took 10 minutes and the difference is unbelievable. its more responsive. quicker. smoother and uses less diesel. highly recommended

Been thinking about buying one of these for a while, finally bit the bullet with the extra 20% off. It has transformed my car, more power through the Rev range and much more drivable. It also feels like it’s getting quicker as the gearbox is starting to learn how much power there is available. Really easy to install, instructions are really clear. I also have to say I was very impressed with the speediness of the delivery. Very happy! 10/10! Thank you TDI tuning.

Received my tuning box today for my 320d X drive bmw wow what a difference power and torque massive difference highly recommended this company top work 👍👍

Just fitted my tdi tuning box to my Jaguar XF. Very pleased to say the least. Much more engine performance and power. Brilliant service from start to finish!. Highly recommend - well done!.

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