I had difficulty installing the sensor connection under the cooler matrix and cpu on my son’s 2016 Mercedes SLK 200. In truth - I couldn’t even see it - never mind safely disconnect/ reconnect. Th... See more
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A tuning box connects to the engine of a vehicle to improve performance and fuel economy. It’s the natural successor of the remap, an easily detected ECU tuning solution. TDI-Tuning write custom maps for every vehicle variant. These maps are then sent to the engine from a tuning box rather than writing them directly onto the engine ECU. The TDI-Tuning Box works for over 6000 engine configurations. Our customers have installed them on boats, tractors, and agricultural vehicles. Installing a TDI-Tuning Box takes less than 15 minutes in most scenarios. They come packaged with specific annotated instructions. If you still need help, our technical team are on hand Monday-Friday. Take a look at our blog posts here: https://tdi-tuning.com/en-gb/blog. You will find a vast collection of previous installs, customer feedback, and much more! We have been tuning cars for over 15 years now, constant technical development and advancements within the automotive industry keep our technical team working hard to improve future functionality and compatibility. Find your car today on our website using our vehicle finder. If you are in the UK, all you need to do is put your registration number in, we will do the rest.
Contact info
Unit 223, Waterhouse Business Centre, CM1 2QE, Chelmsford, United Kingdom
- 01245392255
- sales@tdi-tuning.com
- tdi-tuning.com
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More power and better economy
More power and better economy. Have had the unit in my car a couple months now and save about 0.8 kms per litre over what it was before. Very happy.
Easy to fit, great results
It's been 3 months since I got my order from TDI tuning.
Great instructions were provided that were so clear, my 15 year old daughter fitted the leads for me(smaller fingers were useful, but she didn't need my guidance at all!).
Once fitted we followed the instructions to get the ECU working with the tuning box. Then on with the Bluetooth and give it the beans!
The Power change on my Seat, whilst modest, was instantly noticeable. Fuel economy over the months I've had the box has been almost identical to before, and I use the extra power often.
If I drive sensibly with the chip on a low setting, I see greater MPG than before install. Very handy during oil price hikes!
I drive the length of Wales twice monthly on A roads, and the balance of economy vs power has been incredible. The power when shooting from 35 to 60mph (maybe a little over) is staggering. Top end isn't affected, but getting there is much quicker.
10/10 product. BUT...
I can't help feel the Bluetooth control should be standard for all. That's my only criticism!
Very happy customer, and I'll consider TDI Tuning again in future if I buy a car with a locked down ECU again. In fact, I might just get one for the wife's car!
Transformed my truck immensely
I use my 73 player Ford ranger XLT for towing. I’ve been very disappointed with its power so was very close to spending a further 8k on a wild track. As these ECU’s are blocked and can’t be mapped I found TDI tuning. For £350 I took a gamble to see if it worked. After 10mins I had it all plugged in.
Cut a long story short it was the £350 I’ve ever spent. It has transformed the performance of my truck immensely. I have it set in mode 5 all the time for towing, daily driving and motorways and it never skips a beat. I have now done 5k miles with no issues at all.
I’m not one for leaving reviews but this definitely deserves one.
24 Kia Cerato gt
Communication was excellent, even asking for a picture of the engine bay, to make sure I received the correct box. Arrived quick, and installation was simple. Boost gains are insane, when on setting 7 turn traction control off, to avoid it kicking in.
TDI piggyback system install on Mk8.5 VW GTI
I installed the TDI piggyback system on my 2025 VW GTI 5k miles ago. It has performed flawlessly and I can feel real gains in torque. The only surprise was the $180 tariff levied after the purchase. Not a fault of TDI but it may be helpful getting a reminder from them that their product is subject to a tariff.
Top firm
Their product range is great - plug & play. Staff/Owners are so generous with time/advice. i ordered & received box & then asked if they could fit it - took <1 hr & was done for free. If L1 car tune-up only required then this firm has best priced pre-set up boxes tuned per car type/make. Links to blue tooth very well allowing enhancement of BHP by 1-7 levels on mobile. Box can also be hidden easily.
Absolutely first class service
Absolutely first class service. After a brief conversation over the phone I opted for the Bluetooth version. It arrived on time and was well packaged. The installation instructions are spot on and with in 15 minutes it was installed and I was up and running.
I’ve noticed a vast improvement in performance and fuel economy.
I thoroughly recommend TDI Tuning to anyone.
Big difference in performance but fuel…
Big difference in performance but fuel marginally better.all in all very happy with it
Very easy to deal with
Very easy to deal with, product right price.
Does what it claims to do.
I will purchase again for my next vehicle.
Don't be afraid easy to install
The product is well thought out. Verry clean. OEM. Looking.Easy to install looks nice
Does exactly what it says it does!
Does exactly what it says it does!
The last 3 months have seen us travel…
The last 3 months have seen us travel to Lightning Ridge, west of Bourke, the Sunshine Coast and Moreton Island. There could not be a more diverse experience. And it was bloody amazing. Total (instant) control is something that you’ve yet to experience. And it is a game changer for my 2019 Toyota Hilux Rugged. It really is the best money you’ll spend on a great Retirn on Investment
2014 Mitsubishi L200
I installed the Chip in my 2014 Mitsubishi L200 at the end of January so been running with it for about 3 months and it’s been spot on! Have had the chip on setting 4 most of the time I’ve had it and that seems to be the sweet spot for me. A very noticeable power increase which makes the truck a lot better when towing and getting roughly an extra 6mpg ( more on a longer run). I wanted more power and I got it and extra mpg is just an add bonus.
Fantastic experience
Shipping was super quick from the UK to Australia, the kit was easy to fit and works well, easily saving 10% fuel and when I dial it up... OMG the power
Great quality tuner, easy to install, noticeable extra power!
Very responsive and knowledgeable sales staff, who were able to get me the correct tuner for my plug-in hybrid model, which wasn't listed on their site. Installation was a breeze; two-wire hookup to plug the tuner box into two sensors and then plug the wires to the ECU into the two T-connectors. The materials quality of the box and harness are great; they look and feel like OEM parts. There is a very noticeable boost in engine power. Plus, no check engine lights, and the unit can be removed in a few minutes to put the car back to stock if I need to take it to the dealer. The bluetooth connection to the box is good, and only one time over the last several months wouldn't connect, but did the next time I started the car. I am very happy I found such a relatively affordable, good quality and easy to install tuner product from TDI Tuning. The only negative was that they're based in the UK, so there were tariffs on the purchase, but that is not their fault and I knew that going in.
Delivery and product was great
Delivery and product was great, it has definitely made a difference to my car and I'd recommend it, only reason not for giving 5 stars is that your given a paper instruction sheet, It'd be helpful to have a digital copy of it to for a just incase

Reply from TDI Tuning
Excellent product
Excellent product, made a big difference to my campervan, easy installation, good customer service
Easy to deal with
Easy to deal with, great communication. Quick delivery and the unit works brilliantly
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