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Review summary

Created with AI, based on recent reviews

Considering 150 reviews, reviewers overwhelmingly had a great experience with this company. Customers consistently praise the product for its quality and the noticeable improvements it brings to vehicle performance and fuel economy. Many highlight the ease of installation and the significant gains in power and responsiveness. The service provided is frequently described as professional and efficient, with many people appreciating the quick turnaround times and the helpfulness of the staff. However, some customers also noted difficulties with Bluetooth connectivity and occasional issues with fitting certain connections. A few other people felt that the product did not deliver the expected performance gains, or in rare cases, experienced some unexpected vehicle behavior after installation.

What people talk about most

Product

Customers had positive experiences with the product, reporting significant improvements in vehicle... See more

Quality

Clients share positive opinions on quality, with many reviewers praising the product's ability to deliver... See more

User experience

Reviewers express satisfaction with the user experience, highlighting the ease of installation and operation.... See more

Service

Consumers find service to be positive, with many praising the impressive customer care and quick responses.... See more

Staff

People report positive experiences with staff. Customers consistently praise the team's knowledge,... See more

Reviews shaping this summary

Rated 5 out of 5 stars

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-... See more

Rated 5 out of 5 stars

Amazing! we had owned an Octavia VRS before and missed the extra performance over our standard Octavia, your tuning box has given us the performance back and made the car more responsive and lighter f... See more

Rated 5 out of 5 stars

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

Rated 5 out of 5 stars

So after waiting, waiting and waiting for over 3 years for the Bosch ECU to be cracked on my VW Transporter for remapping I gave up and took the plunge to purchase the appropriate chip for my vehicl... See more


Company details

  1. Auto Tune Up Service
  2. Car Accessories Store
  3. Tuning Automobile

Written by the company

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

4.6

Excellent

TrustScore 4.5 out of 5

2K reviews

5-star
4-star
3-star
2-star
1-star

Replied to 76% of negative reviews

Typically replies within 48 hours

How this company uses Trustpilot

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Rated 5 out of 5 stars

Impressed with the performance

Fitted to my 2019 Cupra Alteca
Comes well packaged and Instructions are very clear and in theory it is easy to fit, only snag I found was one of the connections was at the underside of the engine at the bottom of the radiator and had to partially remove the undertray to reach the connection which was quite fiddley. Everything else was simple to fit.
I brough this to help with fuel Economy more than anything else, I spent quite a bit of time changing the modes (1-7) to see which brought the best results. For me mode 3 was best for Economy bring less than 30mph up to 35mph average on long runs.
Mode 7 seems to be nutcase mode where in Cupra and sport mode the thing takes off !!
Overall very impressed and would by again.

August 22, 2025
Unprompted review
Rated 5 out of 5 stars

great product

great product, that did make a significant difference to the performance of my VW Transporter (T6.1) i would defiantly recommend this to others, only niggly thing was i would say is its not easy to reach some of the connections, you had to fit them by touch as you could not actually see the fittings

August 1, 2025
Unprompted review
Rated 5 out of 5 stars

A+To the team at TDI

The team at TDI were extremely helpful and informative once we sorted couple of bugs out they were extremely responsive, 4 days for a package from England to my doorstep in Melbourne excellent service. And their product actually works very well, well done and thanks guys Geoff C

February 28, 2025
Unprompted review
Rated 5 out of 5 stars

Great customer service and proven product for my Volvo

Great buying experience for my TDI tuning chip. Fast shipping to US. Extra care that was taken to validate I had the right chip for my vehicle since there are multiple configs. Smooth transaction and real performance gains from my car. App is easy to use can lag a little connecting via Bluetooth but all and all I would do it again. 5 stars

June 20, 2025
Unprompted review
Rated 4 out of 5 stars

Great bit of tech

Great bit of tech. My car is transformed (Golf R) really amazing performance and improved fuel economy as a bonus….unless you use the full power available all the time! Torque improvements is noticeable and it makes the car even better than it already is.

August 21, 2025
Unprompted review
TDI Tuning logo

Reply from TDI Tuning

Hi Robin, thanks for the glowing review - your 4* rating is actually lower than our average though so this counts as a negative, we'd love it if your glowing words were reflected in a 5* score. Thanks!

Rated 5 out of 5 stars

Excellent tuning modules - Great people to deal with

I contact them (I cant remember the exact date now) to re-program my tuning box for another vehicle, and had a really great email and nothing was to much any trouble, on top of that I even got a discount. I received the box back very quickly and was surprised it was a completely new unit and wiring loom. After fitting I was amazed at the improvement in drivability and power, especially towing my caravan. top people, this is my second unit from them.

February 1, 2025
Unprompted review
Rated 5 out of 5 stars

Experience counts!

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. The connectors can be brittle.

Fortunately I live close enough to Chelmsford to have Chip perform the operation. He didn’t have to remove the interfering parts as described in the instructions which I had fretted with.

Problem resolved quickly and efficiently!

June 23, 2025
Unprompted review
Rated 5 out of 5 stars

So pleased with my CRTD4 twin channel…

So pleased with my CRTD4 twin channel diesel tuning box, from the ordering process, installation and the results from the great plug-in tuning box.
It’s does everything it says on the tin and more.
I decided to give TDI tuning a try to improve the towing perform on my Fiat Fullback pick-up truck. For everyday use I set the box to level 4 and when towing level 7. Performance and fuel economy improve under both driving conditions; fuel economy even improves under DPF regen conditions!
Also, I’m a UK military veteran and on asking if TDI Tuning give UK military veterans a discount, l was given a free upgrade to the Bluetooth box and free delivery (they did ask for proof of service which l was happy to provide).
I highly recommend TDI Tuning!

April 22, 2025
Unprompted review
Rated 5 out of 5 stars

I had an existing box on my 3 series…

I had an existing box on my 3 series BMW (2 years), which was absolutely amazing and completely faultless!
Luckily, the box was compatible with my new petrol Volvo XC60.
A quick call to the technical department and within 48 hours my car has its tune.
Superb service!!!

July 1, 2025
Unprompted review
Rated 5 out of 5 stars

Very pleasant to do business with TDI…

Very pleasant to do business with TDI Tuning. I contacted them directly via phone and the service was outstanding. I was able to get answers to my questions and with the information provided, place an order for my application. The shipping was provided free and the delivery was quick and on time. I have experienced an immediate and noticeable increase in performance with their product. It was the right choice for me with the support they provided.

June 16, 2025
Unprompted review
Rated 5 out of 5 stars

👌spot on

The speed of the delivery was spot on and the product i received is absolutely spot on I've noticed and increase in my performance the only thing that has really stayed the same is my MPG

May 26, 2025
Unprompted review
Rated 5 out of 5 stars

I replaced my current car make and…

I replaced my current car make and model and required a new wiring harness. The process of ordering was simple and my Tunit box received updadted software over the air.
I had a little problem installing the new harness and contacted Technical Support who couldn't be more helpful and guided me on installing the new wiring harness. Great experience from start to finish.

August 21, 2024
Unprompted review
Rated 5 out of 5 stars

Very helpful on the phone and arrived…

Very helpful on the phone and arrived quickly. Unfortunately I can’t leave a review on how the product works as I installed it the day before we were due to drive to south of France and came out in the morning and the car had been stolen with the TDI tuner in it. To say I’m gutted is an understatement.

June 26, 2025
Unprompted review

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