Great bit kit really impressive gains on my Bmw f30 330d good that it is adjustable too Definitely recommend I was a little unsure but read some of the other reviews an decided to go for it Glad I did!

Purchased a CRTD4 tuning box last week for a Audi A6 2.0TDI 190PS Quattro. Purchase Was quite hesitant at first to put the tuning box on a brand new car, but after reading the reviews TDI tunings professional website and previous reviews put my mind to rest. Receiving Product / Delivery Upon receiving my tuning box on the Saturday afternoon (Only ordered late Thursday night) I was impressed with the packaging and with the fact everything contained within was clearly labelled and the full colour photograph instructions are invaluable, installation was so simple. I would definitely recommend reading the instructions first, as I thought the boost sensor on my engine was completely different where the actual boost sensor was located.The hardest bit of the installation of cutting the cable ties.. that's how easy it was. Started straight away and with no warning lights (one of my biggest fears). Power Difference At first I couldn't really tell the difference, until the engine had fully warmed up and I had a clear stretch of road, then the difference in how quick the revs increased and got back up after a gear change was. I would say its taking a good 1-1.5 seconds off the 0-60 time. The engine just seems to run and sound just that little bit better. Summary Obviously I am yet to test the longevity of the product but all in all I would definitely recommend TDI tunings products, and look forward to hearing about any updates / future products from them. If you like driving then this product will put a smile on your face.

Very impressed! my Mercedes's A220 is running like a dream. lots more power. I highly recommend this company!

Had a twin channel box removed from my Mini Paceman a few weeks back and returned today to have it refitted into my Mini challenge 210, I was unaware that the box needed a complete reprogramme and completely different firmware for it, but it was no problem for the guys who took a little longer than I first expected, but once Stephen explained the change in setup I was super happy with the end result and couldn't wait to try the test drive with Terry. My God what a transformation, definitely worth getting one of these boxes fitted to whatever your driving cos it will blow your socks off. Well done guys and thanks!!

Ordered a CRTD4 tuning box on late saturday for my Toyota Hilux Invincible 200, had a phone call yesterday for me to confirm the vehicle details, connection etc and if there was any different maps programmed, and it was then on my doorstep by 9am this morning. its all fitted and wow under load its a different truck to drive now, just gotta be careful in the wet weather now with a already tail happy truck.

Great product and customer service.. thoroughly recommend. Fitted my twin channel box to my Mercedes Vito 115. Van feels a lot more responsive and torque has improved greatly! Thanks!

I bought the twin channel for my Audi A5 3.0 Diesel back in June 2016. The box was running really well, BHP up by 30% - 40% but MPG down by 4mpg (this was on the highest performance setting). I started getting issues with my box due to a weak connection (my glow plug light came on) so they invited me up to their head office to take a look. They rebuilt the box and refitted for me completely free of charge.. all back to normal, running very well! Brilliant service, very professional and would highly recommend to anyone considering buying a tuning box!

I bought the twin channel for my Audi A5 3.0 Diesel back in June 2016. The box was running really well, BHP up by 30% - 40% but MPG down by 4mpg (this was on the highest performance setting). I started getting issues with my box due to a weak connection (my glow plug light came on) so they invited me up to their head office to take a look. They rebuilt the box and refitted for me completely free of charge.. all back to normal, running very well! Brilliant service, very professional and would highly recommend to anyone considering buying a tuning box!

Took my van in today, Ford Transit Custom 125PS. I booked it in before hand for one of their techs to fit. Very impressed with the service I have received. Very polite and professional staff who know what they are talking about. I went for the CRTD4 system and after installed went for a test drive with the technician. My very first impression was "wow" what a difference. I carry quite a heavy load and the power difference was instantly obvious. Beforehand the vehicle was very sluggish in lower revs and took a while for the power to actually kick in. I now have the power instantly which is exactly why I had the unit fitted. On the way home via the M25 the drive in 5th & 6th gear was perfect. I pressed on the gas and the vehicle just seemed to want to go :)) The engine runs and feels so much smoother now. On the 40 mile journey home the MPG gain was already obvious. I am very impressed and will be transferring the unit onto my next vehicle. Highly recommended.

Took my van in today, Ford Transit Custom 125PS. I booked it in before hand for one of their techs to fit. Very impressed with the service I have received. Very polite and professional staff who know what they are talking about. I went for the CRTD4 system and after installed went for a test drive with the technician. My very first impression was "wow" what a difference. I carry quite a heavy load and the power difference was instantly obvious. Beforehand the vehicle was very sluggish in lower revs and took a while for the power to actually kick in. I now have the power instantly which is exactly why I had the unit fitted. On the way home via the M25 the drive in 5th & 6th gear was perfect. I pressed on the gas and the vehicle just seemed to want to go :)) The engine runs and feels so much smoother now. On the 40 mile journey home the MPG gain was already obvious. I am very impressed and will be transferring the unit onto my next vehicle. Highly recommended.

I bought my crtd2 box for my ford mondeo titanium X sports. First when it was installed by a tec and it was giving me engine management light comes up on and off then I had to take it back and they reprogrammed it for me now I never had any complains.. I get 63mpg now and used to get 54mpg.. But if I turn it to full power and put my foot down then 35mpg but give me a big smile on my face when I saw another car in my rear view mirror.. Only down size it got is to open the box each time I want to change the settings.. Wish it was outside the box and can be changed easily.. I'll definitely recommend the product..

I bought my crtd2 box for my ford mondeo titanium X sports. First when it was installed by a tec and it was giving me engine management light comes up on and off then I had to take it back and they reprogrammed it for me now I never had any complains.. I get 63mpg now and used to get 54mpg.. But if I turn it to full power and put my foot down then 35mpg �but give me a big smile on my face when I saw another car in my rear view mirror.. Only down size it got is to open the box each time I want to change the settings.. Wish it was outside the box and can be changed easily.. I'll definitely recommend the product..

Ordered mine on Thursday evening and it arrived on Friday morning. Easy to fit and does exactly what it says on the tin. I've had tuning boxes before but because this intercepts the fuel and boost sensors it makes a massive difference straight out of the box. My truck feels effortless to drive now and time will tell how fuel economy is affected. Thanks guys !

Just fitted ithe 2 channel box today to a 3.0L A5 quattro and what difference an thats just on the optimal (middle setting) didn't try the other 3 setting on ether side for performance and fuel consumption because it's pissing down ou side and didn't want to get water in it. As it stands just now on optimal the power increase is well worth the money, can't wait to see what it's like at max :-D :-D :-D

After fitting a twin chanel tuning box to my Navara I initially found it developed a strange problem. Since contacting TDI Tuning and visiting them at Chelmsford they have remapped the box and the problem has gone, what's more impressive is that on my way home to Norfolk it returned a very satisfying 37.4 mpg!!! It's never reached that in the 6 years I've owned it. Well done TDI Tuning, well impressed.

Excellent service. Top quality product. Attempted to put it on myself and failed... Lady behind the desk got her hands dirty and put me to shame. 10/10 highly recommended.

Have had the tuning box fitted to my MG6 GT S 1.8 Turbo 160ps for a couple of months after assisting TDI tuning with developing the box for the MG6 Petrol Engine. Must say I am quite impressed by the improvement in performance, the car drives so much better and feels like it has been set free and now has the power it should have been given by the manufacturer. I have had a play on a most of the settings but find that the middle setting to give me better fuel economy and adequate performance boosts for my needs and am averaging 4-6mpg more than before I installed the tuning box. However if I do want to have some fun it's so simple and quick to change the setting. Michael and his team at TDI Tuning were very helpful and answered any questions that I had regarding the tuning box.

Couldn't believe how quickly and neat the guys fitted my twin channel box to my 430d m-sport! Made such a difference, drives like a different car! Thanks guys give me a tag if you get round to putting the picture up! (White 430 with carbon parts)