Remap vs Tuning Box

What is remap, and what is a tuning box


A remap is a modification to the cars factory ECU (engine control unit) by which the fuelling of the car is changed at various points to improve power and/or fuel economy. A good remap is carried out on a rolling road, where the remapper uses a computer to reprogram your ECU with new software.

Diesel Tuning Box

A diesel tuning box provides very similar modifications to the cars fuelling, however instead of modifying the vehicles ECU software, this is left alone and the tuning box plugs into the cars wiring loom. This enables the tuning box to modify the signals from the ECU in real time meaning that if the tuning box were to be removed, the vehicle returns back to standard.

So which is better?

Customers often ask us why they should pick a tuning box over a remap or vice versa: we would like to give you the unbiased facts so you can make an informed decision. The most important point to make is: not all diesel tuning boxes are the same. Similarly not all remaps are the same. Which one is right for you is entirely dependant on your personal requirements.

Both high quality diesel tuning boxes and high quality remaps can give very good results, improving power and toruqe, reducing turbo lag and improving fuel economy (MPG).


Unfortunately there are many companies out there which offer poor quality remaps and possibly even more companies which offer poor quality diesel tuning boxes, both of which offer a combination of poor performance and potential for damage to your vehicle.

Here at Bluespark Automotive we are prepared to put our money where our mouth is, offering a 28 day no quibble money back guarantee, as well as a 2 year warranty on all Bluespark products.

Presuming that you are comparing products of similar quality, our comparison is as

  • Must be carried out in an area local to the remapper. Not only does this mean that it’s often a long drive to have your car remapped, it also means that you may have to travel some distance if any problems crop up.
  • Remaps are a permanent install, and cannot be removed when you sell the vehicle or if you wish to remove it during servicing.
  • Remaps are not user adjustable and cannot be switched off.
  • Are often removed by the manufacturer when servicing.
  • High quality remaps often cost over £400.
Bluespark Pro Tuning Box
  • Can be delivered in the post and fitted easily by the customer, with full and comprehensive instructions to assist you with the process. If you decide that you are not 100% happy, return the unit to us within 28 days for a full refund.
  • Can be removed when the vehicle is sold, and either fitted to a replacement vehicle of the same model, or sent back to us to be remapped for a new vehicle.
  • The Bluespark Pro Diesel Tuning box is user adjustable, not only for power output but based upon optimisation for your vehicle’s use. For example if you permit an inexperienced driver, maybe a son or daughter or employee to drive your vehicle, power output can be reduced at the turn of a switch.
  • You can also change fuelling if you modify your vehicle at a later date, such as fitting a performance air filter etc.
  • The Bluespark Pro Tuning box is available for the majority of common rail vehicles for £200 and with integrated Turbocharger boost control for £280.


Can't find it? Try our reg search

Bluespark Pro - BMW 320d 2009

"I had bought cheaper alternatives for my previous car which was a VW Golf 2.0GT TDI and they were awful. I was therefore not expecting much for my money. First of all the installation is very easy indeed. The car was a 177bhp BMW 320d and was ok but a wee bit sluggish. I took the car out for a 10 mile drive to test the Bluespark Pro and I could have driven it for 1000 miles. Its astonishing. I'm at 220bhp now with similar if not slightly better MPG. I think the thing to remember is with more power you tend to drive less efficently and why not!? The power under your right foot is addictive. I admit fully I race through the gears from lights. The most impressive part performance gain is the power in 2nd and 3rd gear, it will throw your head back. Don't even think about buying one of these just get your credit card out and do it already."

Andrew McLeod

Bluespark Pro + Boost - Audi Q3 2.0 TDi 150

" I ordered a Bluespark Pro + Boost tuning box for my 2015 Audi Q3 150hp. It arrived quickly and with excellent photo fitting took me about 5 mins to what a difference it makes. Really pulls once you get into second gear and just keeps going through all the gears.

Money well spent. Thanks"

Jason Tillet

Bluespark Pro - Peugeot 407 SV HDi 2.7 V6

"With a starting point of 150Kw and 440Nm this car was no slouch. But since fitting a Pro Chip with Boost Control it has been transformed into a smooth, effortless powerhouse. 190Kw and 550Nm with improved economy of at least 10% (spirited driving on the default setting). The torque delivery is linear with gear changes now almost imperceptible and no noticeable turbo lag from take off. I used to really enjoy driving this car, now I just love it! :) We have two vehicles fitted with Diesel Pro Chips and I have no hesitation recommending Bluespark Performance Chips. "

Phil Murrell

Bluespark Pro - Ford Kuga 2.0 zetec 4x4 auto

"Best move I ever made buying this. I wanted to improve the towing ability and get better mpg. Acceleration with and without the caravan has greatly improved and the auto gearbox is so much smoother with the module fitted and doesn't have to change down as much as it used too. Fuel economy is better, solo it is up by 10% but with the caravan attached it's 12% better. I had hoped for an increase in economy and the results are better than I expected. I haven't tried the other settings yet, I have left it set as supplied. Would I recommend this product, yes without reservation worth every penny."


Bluespark Pro + Boost - Renault Master 2011 2.3dci

"Im glad i bought this, looked at different devices of similar ratings and was also thinking of getting it done pprofessionaly at local garage, but after reading the reviews i selected the bluespark pro. What a difference it has made to the power gains, less gear changing on uphill driving and superb response on driving of, factory set at B/5 but i reackon the best stting is C/5. im one well pleased customer, would recommend this to anyone, easy fit (read the instructions first, it helps) and much cheaper than other similar boxes. "


Bluespark Pro Petrol Turbo - Volvo V40 2.0 T2 R Design

"I've just arrived home after having my Bluespark Pro module fitted and what can I say but WOW! The performance gain is phenomenal and the engine seems to run a lot smoother. The reason I've put no change in the economy section is because I was having a bit of a play coming home but there didn't appear to be any difference in the use of fuel but I will repost after a month or whenever I can get the smile off my face. My car went from a stock 122Bhp to 176Bhp which is a massive gain! Thanks to the Bluespark team and especially Edd for making my trip worth while. "


Bluespark Pro + Boost - Toyota Hilux 3.0 D4D

"I don't do feedback, however if you have a hilux you will not believe the difference. The vehicle pulls so much better and smoother. I'm not to bothered about top end as it is a pick-up after all. Not had it fitted long enough to check economy difference but i expect it to be slightly better even if not it's well worth fitting. If you pull a trailer then fit a Bluespark."


Bluespark Pro + Boost - Mercedes C220 CDI w205

"Fitted the CR Tech 2 over the weekend, and took the car for a long drive over the moors and the car pulled so well in ECO mode i didn't want to change it to sports mode, the torque was there and it stayed in gear for the hills that i thought it would change down for. the MPG went up to 57 round these roads, so i cant wait for a long motorway drive, and a big thanks to Greg for your advice. Well Recommended "


Bluespark Pro + Boost - Mitsubishi L200 2.5 DID

"Bought box took minutes to fit very easy, Tried it on standard setting which was c slight improvement so then moved up to d then e, with it set on e with fine tuning set on 5 it was impressive pulled well so bought a k and n filter and with the two the difference is huge pulls like a train and ive seen an increase in mpg not could not be happier and customer services was great rung up and picked box up within 20 minutes "


Bluespark Pro Petrol Turbo - Seat Leon mk3 1.8TSI DSG

"Had one of these boxes on my Abarth previously so knew they were great quality. Was a bit worried about the DSG box on my new car. Spoke to the guys at Bluespark who were able to reassure me they had tested my version and I decided to go for it. So glad I did - wow! Good improvement on setting 3 but phenomenal acceleration on setting 4 with no obvious loss of MPG. Now Golf GTI fast. Awesome!"