Yesterday I bought a tuning box for my BMW 120D. After some extensive thought and research, I took the plunge. The box works fantastically. As soon as I installed it the increase in torque and power was obvious. The power delivery is much more linear and the turbo lag has been vastly reduced. The head technician was very helpful and gave me some useful advice for installing the box.

Great service today from TDI, when reinstalling my box. I arrived for my midday appt, and the previous job (large RV) was overrunning, due to the positioning for that vehicle. Rather than making me wait for ages for what was a 5 min job, commonsense was engaged and mine was done immediately, saving me a long time and hardly delaying the RV at all. In a world with little common sense, I was impressed.

Just had CRTD4 box reprogrammed to new car (fitted for free) and it goes great. Keep up the great work. Always helpful and fit me in very quickly! Thanks once again wilm be recommending!

Thanks to these guys my pickup is a flying machine top product

Called in to TDI today to have a Bluetooth tuning box fitted to my Audi S1. Met Steve and Alister who are very passionate about the business and the product, explained exactly how it worked and the technicalities of the engine and what happens as they adjust and manipulate the signals. The verdict? The car is transformed! Pulls harder, pulls past 6000rpm with ease and is significantly stronger throughout the Rev range. The best part for me is the mapping adjustment has kept the standard feel, just a lot stronger throughout. Also as I am going to hand the car back at the end of the finance term it’s easily removable.

Brilliant service and after service communication brilliant 👊

Picked up my CRTD4 Twin Channel Tuning Box Chip today for my Mercedes GLA 220d AMG. 175bhp to 240bhp and 340 torque to 420 torque. You can definitely feel the power! Easy to fit, great customer care equals a very happy customer. 👍

Just had a box installed on my Golf GTD. a great experience. Very polite, friendly & helpful staff. Answered all my queries & concerns. Driving home, getting 60 mpg which I have never previously managed to obtain. Also the car pulls like a train. I was a little apprehensive but took the plunge and the results go above and beyond my expectations. Highly recommended !!

Very helpful, friendly and supportive team. Will recommend and use again.

Visited the guys in Manchester this afternoon. Great service thanks again.

great service. great product. Thanks guys

Ordered a box for my Mercedes E250 CDI night edition. Fitted this myself, took about 25 minutes. Difference is night and day in performance, throttle response and no turbo Lag at all. Fuel economy has increased by 5-10% and performance by 25% roughly. Highly recommend it and well worth it.

Finally got the box installed on my 208 GT line with the help from a local garage, holy god what a difference its made, no flat spots acceleration is incredible, took it on a run and was returning MPG figures of 88.5mpg, simply worth every penny

Purchased a tuning chip with Bluetooth connection for my SQ5 other week had chance to fit it today with simple instructions I spoke today with Stuart a helpful chap from TDI Tuning it seemed I had trouble with the installation only due to my own fault I hadn’t ensured one of the connections wasn’t fully connected, it was good to have someone only a phone call away to guide me in the right direction , I have noticed a difference and very happy with the results , I did fit the chip my self they do send you simple steps to complete il I will advise if you was to go down the same route as me is to ensure all connections are firmly in place and to follow instructions given carefully .

Received my tuning box within 48hrs. super fast service. only took me 5 minutes to fit and most of that was securing and routing the cables. The user guide was excellent and very well laid out in plain language so anyone can follow it. I've only done a very short run out with it fitted but the difference is noticeably better at low speeds. can't wait to open her up properly on a faster run and see what it can do.

After purchasing a BMW 435d with Autovogue styling and performance upgrades, I had an issue with a drivetrain malfunction message. I took the car to my local garage who diagnosed the fault with all issues pointing towards the TDI tuning box and removed the box. On finding this information I went back to the dealer where I purchased the car and also Autovogue directly, neither were interested in resolving the issue. I called TDI and spoke with Stuart Hill who couldn’t help me enough. He emailed me with their address and asked me to post the box to them. I did this and within 2 days got a call saying he had reflashed the box with the most up to date software and he was posting back with fresh installation/fitting instructions. This was all free of charge. What a fantastic service. Stuart, you made this real easy. When the other 2 parties showed no interest, you made TDI Tuning accountable for rectifying the issue. Much appreciated.

Very friendly service! Used them when I had my Freelander and made a big difference to my fuel economy! Highly recommended