Just bought a tuning box for a mercedes c350e and couldn't get it to work,thought I would go and speak to the company directly rather than emailing them. 1 off the mechanics was really helpful in explaining the issues and actually fitted the box for me,saving me the hassle. Many thanks.

Couldn't speak more highly of TDI Tuning! Box came quickly and managed to get it installed, with some technical help, easily! Car feels completely different and as it should from the factory!

So it's 5 stars for the Company, even though the product itself didn't work for me. I have a really uneconomical car, and I was probably hoping for a bit of a miracle but in short, I tried the performance chip and it didn't work out, the Company were really helpful and the returns process was handled swiftly. I know from other people and other reviews that the product itself really does work for a lot of people, and I would highly recommend using this Company.

Recently had my tuning box reprogrammed for my new car Outstanding service and speedy delivery. Very happy with the increased performance from this little box. 10/10 Highly recommended.

Great company. Friendly and very knowledgeable with all things tuning. Fitted me in last minute to have a box fitted and super happy with the results

I ordered a tuning box for my sq5 on Thursday afternoon. It arrived Friday morning. I didn’t get a chance to fit it until Sunday and I encountered a small problem. I left it and rang the office Monday morning and they told me to bring it straight up. In 40 mins I was heading back to Kent trying to take in how much better the car was driving. Fuel economy much better and power delivery outstanding. These guys give fantastic after sales service and are so helpful I cannot praise them enough. 5 star treatment. Many thanks

2nd tuning box I've bought from tdi tuning. 3.0tdi audi thunders along! An absolute must for this engine! Been on car for 2 years. No problems what so ever. Made a phone call 9am for tuning box for my 2014 fiesta st3. Picked it up 11am! Had a fitting problem. Which was entirely my fault!!! The after sales service was outstanding! Sorted in minutes. Car now goes like a 'mad squirrel' You don't get this sort of service these days very often. Very happy customer.

Ordered Wednesday morning and it arrived Thursday morning. Took less than 10 mins to install. I was very sceptical at first but decided just to go for it. Drove car for 60ish miles after install then started to play about with it. I have never seen my car do more than 44mpg on the motorway but on setting 4 I was getting 52mpg. Setting 7 is great fun. Definitely notice a difference with the performance. So far so good and no warning lights on dash.

I purchased the tuning box from TDITuning for my Volvo V70 - Great price, great gains guaranteed. The box arrived, easy to fit and straight away noticed insane gains in both top end power and torque!! Unfortunately, after a month, the gains went and it seems like it went back to stock. I emailed TDITuning who were near instant to reply and replaced the box with the upgraded BlueTooth version - Again, this was great, noticeable gains etc... but only for 3 or so days... at this point TDITuning advised there is a compatibility problem between their box and my car so offered me a full refund. I leave them 5* as their customer service is absolutely amazing. Refunding outside the refund period due to this issue is something I was not expecting but very grateful for. When this worked, it worked very well - Shame it diddnt work for long. Most likely an issue with older Volvos as this is a new on for them and me. Overall, this company is amazing. Thanks

Received my box today, came next day.. was easy to install.. straight away noticed the turbo is throwing alot more boost out.. alot more bottem end grunt.. mode 7 the car feels alot more aggressive round town.. but pulls alot harder on the open roads.. wasn't expecting much from a chip tune.. but overall really surprising how much extra grunt it has given my mercedes Eclass.. would recommend it.. as its easy to install and to take off for going back to the dealership.. service/recalls

Great costumer’s service. Nice and easy install. Quick posting . Definitely improved Economy and bhp Vw transporter 140bhp

Hi everyone, I had a box fitted 2 years ago and it has been fantastic, no trouble at all. Just been speaking to the team and they have been very helpful as usual. I decided to have a look at their reviews and was shocked how bad some were. I was shocked because it seemed some people don't seem to understand the system. You have to fit it correctly and use your car correctly. Some complain about the poor economy results, well if you want better economy, you have to drive economically. The box helps you achieve the economy but you have to play your part, its not a magic wand, you have to use the capability of the equipment to get your desired result, and believe me it works. Keep up the good work TDI.

Just received our tuning box today for our T6.1 transporter 2022 model, Just want to say thanks to the guys a TDI Tuning for all there help getting us the right wiring loom. Got it fitted this afternoon, Bit fiddley getting the wiring loom connected but we got there in the end. The box and the Bluetooth connectivity work fantastic. Certainly wakes this what was a sluggish engine up. Thanks again Very happy i went for this TDI tuning box opposed to a map which would of probably voided my vehicles warranty. Also the instruction's which came with the box were spot on, showing where the wiring loom connects A1 service.

Greatwall Steed 2L - OMG what a difference this little box made, whole load of more power on demand on the go (have the Bluetooth option), greatly reduced the over-run and added over 10 miles per gallon to the efficiency. Paid for itself within 3 months. Absolutely delighted with it. Easy install, took about 15 minutes, install guides are easy to use (don’t forget to get the serial number before you attach it to the vehicle!) rookie error, easily resolved

Staff very helpful and know there stuff, very impressed with the box , better than tunit which they removed to fit theres.

Great products and support, will definitely purchase from them again

So everyone with a jeep wrangler will know how bad the mpg is... Well I got the TDI Tuning chip installed for that reason. Jeepers need to do this, the power is so much berrer and I'm getting 29.6mpg on program 4 (combines acceleration and fuel efficiency)

Words cannot express my satisfaction. My 1.4 tfsi now performing like a beast. Throttle response, torque and performance overall way better than before. I’d recommend anyday

I first installed my TDi tuning box onto my Jaguar XE 25T nearly 2 years ago and have been really happy ever since. However, recently there has been a thread running on a forum that I participate in where someone had installed the very latest version on their 25T XE, it immediately became apparent that the latest "map" for the XE gave another 10hp and almost 20ftlb of torque over the "map" installed in my tuning box. Cut a long story short, I phoned TDi and spoke to Alex (Monday morning) he told me to send my box back and they could install the latest map for me. Box removed and returned on Tuesday, they received Wednesday morning and by that afternoon it was on it's way back to me, I received Thursday morning. That is absolutely phenomenal Customer service. More important are the results of the new updated map. The car has found found a new lease of life, mid range torque is staggering, it really is like driving a completely different car, on a motorway I just have to touch the accelerator and it's off, simply amazing. A huge thank you to Alex and all the guys at TDi tuning, you have made a long time Customer even happier, I will continue to highly recommend you to any person I know with an interest and passion for cars.

Quick and professional service and works a treat. Instructions for installing were good and had no issues fitting the box.