Only had it in half a day � and I'm loving it it just gives you that power when you ask for it and when it go in to sports wow it flys and its only set on number 4 not sure I'm ready to try 5-6-7 � thanks TDI you guys need more then 5 stars so I'm giving a 10 guys good product thank you �

Renault Megane Coupe Mk11 1.5 Diesel - Ok, an increase from 105bhp to 139bhp is not exactly groundbreaking, but the vehicle is far smoother, responsive and has a massive decrease in turbo lag. Fitting was straight forward. The hardest part was finding somewhere safe to locate the box. Very, very impressed. Thanks TDi Tuning.

Fantastic service just fitted new tuning box to car. Everything as promised. Third car that they've fitted tuning box to.fantastic!

thank u so much quick delivery easy to fit an it's like I av a new car every 1 should use TDI Tuning thanks again :)

thank u so much quick delivery easy to fit an it's like I av a new car every 1 should use TDI Tuning thanks again :)

Great to deal with. I have one in my 3.2 auto Ranger Wildtrak and it transformed the driving experience. Smoother, quicker and just better! Fuel is certainly no worse, probably better, but I wanted it for more acceleration on motorways and it certainly has that. After about one year some water seeped in to a connector. No quibble, no excuses, they simply fixed it on the spot when I arrived at their offices. Will use again.

As I have always just got a remap I was not sure about boxes in general. I have looked at heaps of them but was just not sure. I started following tdi tuning on facebook and was reading everything they put up but also comments people were leaving. I asked a few questions over about a three month period and they answered them with in a few days. I looked at other company's and was doing the same thing. On their website I have honestly put it in my basket about 8 times but never went through with it as I thought it would not be as good as a remap. I finally just bought one about 2-3weeks ago after reading about another customer with a merc who had it fitted at there place of business. It claimed he liked, he bought it and would test week and if he didn't want could take it back for a full refund.. that made me buy it.... I am not sending it back... my flat spot is going and in every gear my car is more responsive and feels like a different car at roundabouts. Thanks tdi tuning.

Gen 3 Mini cooper D, 1.5l & BMW 318d Delivered promptly as advertised and install took about ten minutes once i knew what to do (second time round) Had to get some online advice from Amelia at TDI who couldnt of been more helpfull with a follow up from her again after speaking to the technical department, currently fitted with the box set more towards economy as it put the car into "limp" mode on optimal. It now pulls cleanly all the way to the rev limiter with no real drop off in power making overtakes a breeze, a bit of torque steering on damp roads under full acceleration is the only minor and completely avoidable downside at the moment. I'll be getting one for my 318d I've now had one fitted to the 318d , 50 minutes later I returned and it's all done. Test driven on optimum setting and then driven home noticing power gains and improved fuel economy. I have changed the setting to full power and driving enthusiastically I'm still getting over 51mpg and the driving pleasure had increased beyond measure, i love it !!

Had a great experience with the guys at TDI, they are passionate about their product, its development and about customer care. Had a box fitted to my V6 twin Turbo Merc. I was able to watch them fit it, they took great care and made an excellent job of locating it in a secure place, whilst making it easily accessible to change the maps. It was already a quick car, but the difference the box makes is striking, especially when set to map 7. It's almost too quick for this time of year when the roads are cold, setting off the traction control when on full throttle at any speed under about 50 mph, even on dry roads. I might have to turn it down until the spring! TDI claimed an increase in BHP from 370 (std) to 430. Early one cold morning, the Pro Race app on my iPhone (which is surprisingly accurate) calculated the BHP at 452! Obviously ambient air pressure and temperature have an impact too, but even so, there is no doubt that TDI box does a great job and is great value. Thank you.

The tdi tuning box is the best product I've used for tuning my van it has different maps on it since putting it on my vehicle I now get more power more torque and am getting 50mpg on motorway so am very happy with it and really simple to fit

The tdi tuning box is the best product I've used for tuning my van it has different maps on it since putting it on my vehicle I now get more power more torque and am getting 50mpg on motorway so am very happy with it and really simple to fit

I have a CRTD4 Triple Channel on my Ford Kuga 2.0TDCi 140PS - The overall drive of my vehicle is completely transformed in power. I also used to have a hesitation in first gear when pulling out on roundabouts and turnings which is now completely gone. I love the fact I can change the settings easily to adapt to the journey I am going to do.

Bought the CRTD4 unit for my Ford Kuga. I have to say I'm unbelievably impressed!. The bhp gains are very impressive and the torque gains are unreal, best of all I'm now getting 49 average mpg , not bad for a 4x4 2ltr!. For anyone thinking of buying one of these units it's a no brainier!. Top job guys

Bought the CRTD4 unit for my Ford Kuga. I have to say I'm unbelievably impressed!. The bhp gains are very impressive and the torque gains are unreal, best of all I'm now getting 49 average mpg , not bad for a 4x4 2ltr!. For anyone thinking of buying one of these units it's a no brainier!. Top job guys

Had mine fitted yesterday on my ford s max. Well impressed with the extra power. Don't get no more mpg cos I keep sticking my foot down.lol. wouldn't hesitate to recommend to my friends.

Pretty happy with Tdi tunning service. Best performence !

Ordered a CRTD4 after a couple of months of thinking about it. Great instructions very easy to follow. Been running it for nearly a week 40 mile journey to work, mostly motorway was getting 44-46 mpg now getting 53-54 mpg plus smoother gear changes and much better acceleration. Still running it on setting 4 can't decide if to go low for more economy or higher for power. Good service, good product. And I love the car it's given me.

Fitted this bit if kit to my Ford Kuga which was sluggish starting off. First of all brilliant instructions and very easy to fit and looks the part under the bonnet. As for performance set to number 4 for the first 20 miles ... love it I have bought some crap in my time but this tuner is outstanding. It may be pricey But if your looking for performance go for it great bit of kit.

Fitted this bit if kit to my Ford Kuga which was sluggish starting off. First of all brilliant instructions and very easy to fit and looks the part under the bonnet. As for performance set to number 4 for the first 20 miles ... love it I have bought some crap in my time but this tuner is outstanding. It may be pricey But if your looking for performance go for it great bit of kit.