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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

Super happy

Hi, recently received my TDI tuning box, it took less than half an hour to install great product good quality wiring harness perfect length to mount on top of fuse box on my D40 Navara, blue tooth works well, as for performance it's next level, I'm super happy with the unit, service and price. You can't go wrong. Regards Robert Seaman.

November 27, 2025
Unprompted review
Rated 5 out of 5 stars

Worth the money

A few months after receiving this product I took it to a rolling road. The power went from 379bhp to 425 bhp, I think that’s well worth the cost of one of these tuning boxes. They are also very easy to fit. Another good point to note is the customer service I received.

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

very impressed with the speed of…

very impressed with the speed of response from TDI, after a couple of years of faultless operation i sent my Tuning Box back for a check, it was posted back the day arrived, communication is faultless, this is how it should be done, other businesses could learn from TDI Tuning

November 19, 2025
Unprompted review
Rated 5 out of 5 stars

Brilliant experience

Brilliant experience, had my box remapped for my mini sd, had it on previous mini, great turn around only a few days and a big difference as always and of course what happens, a week later another car came up to good to let go.
Contacted DTI and they reprogrammed box for new car free of charge ......
Again very quick turn around and excellent service and customer experience 100%

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

Great product.

I purchased this quite a while ago and have finally got it fitted and what a difference it makes, extra power with better fuel economy. Brilliant product,highly recommend.

June 2, 2025
Unprompted review
Rated 1 out of 5 stars

Avoid

Initially after doing my own research I thought everything would go smoothly. However, after a couple of weeks of using the box it suddenly failed. Customer service was great and I return the box for a repair/replacement. Tdi tuning confirmed my box had a fault. They sent over a prepaid DHL label and I returned.

I received my new box a few days later and was excited about getting it installed. Once I had installed, I once again had a flashing glow plug light which was non-existent until the installation of the TDI tuning box. I double checked the installation and I double checked I followed all procedures. But still the fault remained. I also ended up going up a hill and had little to no power so I had to disconnect. I then contacted TDI tuning who the said they would like more pictures of the wiring ect. At this point i was getting inpatient, after spending £305.00 on a device that did not work.

Please bare in mind, I changed my own drive shafts, installed an android head unit, changed discs, pads, bearings, steering knuckle assembly. So I am competent and knowledgeable about cars and it seemed they were trying to blame it on my competence.

Anyway, I ended up forgetting about it until I was going to sell the car and remembered.

I then raised an email requesting a return and a full refund which was declined as 30 days had past.

Tdi tuning offered to alter for my new car but to be honest I don't want it going on my new vehicle after everything that has gone one.

5 star customer service, and the product is 5 star until it stops working which is usually weeks later.

October 7, 2025
Unprompted review
Rated 5 out of 5 stars

Specifically built for your motor. Not a generic lightbox.

Web experience was a bit confusing for a US Volvo. However, one email to support and I had the correct kit number for my motor. Shipping was quick and well packed. Installation was straightforward with the well illustrated instructions. A bit of a hitch finding the serial number for Bluetooth pairing but finally found it Just completed today, so still in baseline learning mode. Overall the experience with TDI was brilliant. I look forward to the results.

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

The team were amazing

The team were amazing, I opted to have a go at fitting myself and when things went wrong the guys at TDI squeezed me in and accommodated a quick resolve, explained what I had done wrong and the car now drives fantastic....better than it did from new!!!!! would strongly recommend and will :-)

September 22, 2025
Unprompted review
Rated 1 out of 5 stars

Avoid at all costs

I purchased a box for my Mercedes A Class. Upon installation the engine management light immediately came on but I was reassured this was normal. Initially I notified a performance gain, but this didn’t last long. A couple of days after the initial engine light went off I started having numerous problems with the car. It wouldn’t accelerate past 20mph, it wasn’t smooth to drive anymore, faults with the abs system, the steering was heavy. I went to the garage numerous of times and paid hundreds in diagnostics and repairs. Finally they advised me it also needed replacement swirl flap diffusers… aka engine damage. The garage told me to sell the car as soon as I possibly could. So I had to sell it not even 6 months after purchase causing significant financial loss. TDI Tuning? They asked me to re-install the box back into the car to show them the issues and refused a refund as the box was only under warranty for repair. Avoid at all costs.

Edit - How can I send the tuning box back for inspection / fixing when I had a car that no longer works? You asked me to fit the box back to a car I didn't have and that didn't work...

The email was as follows:
Hi Jessica
Our 5 year warranty covers any repairs, Updates etc on the tuning box throughout this period however a refund is not possible as we operate a 30 day money back guarantee.

I am confident we can get this resolved for you here.

Kind Regards,
Jake

March 31, 2025
Unprompted review
TDI Tuning logo

Reply from TDI Tuning

Hi Jessica.

Thank you for your review, looking at your order I can see your tuning module was fitted incorrectly in 2024 which we emailed you regarding and showed you what plug you fitted wrong which you then confirmed this and got it fitted correctly.

You then contacted us 6 months later requesting a refund and was not willing to help us find out what the issues were or send the tuning box back for a warranty inspection.

We operate a 30 day money back guarantee what has expired.

If you wish to send the box back for an inspection please contact our technical department who will be happy to help you.

Kind Regards
TDI Tuning

Rated 4 out of 5 stars

Fast resolution, good overall service

Overall a good experience with TDI Tuning. When my first unit went missing in transit, they acted quickly and made sure I received a replacement without delay. The box works well and I’m happy with the outcome.

The only slight disappointment was that no help was offered with fitting or a goodwill gesture like Bluetooth activation, which would have been a nice extra touch. Still, their professionalism and fast resolution of the delivery issue stood out, and I’d recommend them.

September 9, 2025
Unprompted review
Rated 5 out of 5 stars

Very easy to deal with and efficient!

Very easy to deal with and efficient!
I was able to re-purpose an existing unit on another car. The new wiring harness arrived quickly and updating the firmware on the unit was easy with simple instructions provided to follow. Very impressed overall and I wouldn't hesitate to recommend TDI Tuning!

April 14, 2025
Unprompted review
Rated 5 out of 5 stars

From start to finish customer service…

From start to finish customer service was flawless. Phone contact with TDI put me right at ease. Decided to have it fitted in house for an additional £25. Was done in less than ½ an hour. Transit drives faster when fully laden than when it was empty before.
Cheers to all at TDI tuning.

March 12, 2025
Unprompted review
Rated 5 out of 5 stars

The tuning module arrived in the mail…

The tuning module arrived in the mail quickly especially coming from England to Australia.
I have noticed a good improvement in both performance and economy. However without using a dyno I seriously doubt the horespower and torque figures claimed. Having said that I'm not unhappy with what I got for the price.

June 23, 2025
Unprompted review
Rated 4 out of 5 stars

Great company.

Customer service and the attention to customer satisfaction. Swift handling of my order and being helpful with my questions.
I just would like the company to include the recommendations into the instructions

August 24, 2024
Unprompted review
Rated 5 out of 5 stars

Fantastic product that lives up to all…

Fantastic product that lives up to all of TDI Tuning's claims. My CRTD4 Twin Channel Diesel Tuning Box Chip Kit with Bluetooth connectivity was ordered & delivered quickly, easily & with parcel tracking.
Comprehensive instructions were supplied with the kit for my 2.2l turbo diesel Santa Fe boosting power from 147kW to 194kW, torque from 440Nm to 524Nm & with a fuel efficiency increase of up to 20% depending on the bluetooth adjustable settings, ranging from 1 (max economy) to 7 (max power & torque) with the press of a few buttons.
Installation took less than 1/2 hour with the most complicated bit being disconnecting a factory fitted sensor to plug in the kit sensor. The instructions were comprehensive, clear & with photos for guidance. Plus help from the TDI engineers was only a phone call away if I couldn't figure it out. The rest of the install was simple.
Power & torque gains were really impressive when testing after installation & I was surprised at the increases in acceleration. For my better half when she drives I leave it on Setting 1, for myself I crank it up to Setting 7.
Great fit & finish of the kit & easy to remove when going in for a yearly service. Would recommend to anyone - this definitely lives up to it's hype. Great job TDI Tuning!

August 24, 2025
Unprompted review

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