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BHP Plus > Diesel Tuning Box > Speedhawk Diesel Tuning Box - Common Rail
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Speedhawk Diesel Tuning Box - Common Rail (Box Contents)
Speedhawk Diesel Tuning Box - Common Rail
Speedhawk Diesel Tuning Box - Common Rail (Connector)

Mazda Mazda 3 - Speedhawk Diesel Tuning Box - Common Rail

Customer Rating: (32 ratings)
Product Code: BHPCR1
Vehicle: Mazda Mazda 3 2.0 CD DPF 143 BHP CR-4 Tuned: 168 bhp 25 bhp

Key Features:

  • Accurate Tuning Maps for the Greatest Power
  • Engine Specific Tuning Maps for the smoothest results
  • Most reliable Tuning Maps for a consistent drive
  • Total Control with On/Off Remote
  • Nothing to Lose 28 day Money Back Guarantee
  • 5 Year Warranty for peace of mind
  • Highest Quality German Technology

Buy yours today!

275.00 (inc. VAT)
In Stock
Plug Type
FREE UK Delivery (1-2 days)
28 Day Money Back Guarantee
PowerfulIncrease BHP and Torque
Simpleto fit and easy to use
Safefor all diesel engines

Unique, Accurate and Advanced Tuning Maps giving the most Powerful results

The tuning maps programmed on the Speedhawk tuning box are a result of over 20 years experience and are far superior than others, providing more powerful, smoother and safer performance increases. Get the best results with the best product.
Diesel Tuning Box for:

Mazda Mazda 3 2.0 CD DPF 143 BHP CR-4

Original Tuned Explained
Power (bhp)
Achieve more efficient driving providing 17% more bhp than standard figures.
Achieve more efficient driving providing up to 35% more bhp than standard figures.
Torque (Nm)
Transform the performance of the engine with 14% more torque, so no more struggling with overtaking, getting up hills or pulling heavy loads.
Transform the performance of the engine with up to 35% more torque, so no more struggling with overtaking, getting up hills or pulling heavy loads.
Top Speed (mph)
130 *
Increased available power from the diesel tuning box will increase the vehicles top speed by 4 mph to a maximum speed of 130 mph.
Increased available power from the diesel tuning box will usually increase the vehicles top speed by up to 5mph.

Revs per minute (RPM)

Fuel Economy

Fuel Economy

Moving the power to lower rev ranges can produce up to 20% improved fuel economy meaning you also acheive up to 20% reduction in CO2 emissions.

Typical improvements in MPG are between 10-15%, but our tuning boxes can produce up to 20% depending on your vehicle use, driving style and the condition of the engine.

* Note: tuning units are not designed to increase the maximum speed of the vehicle, however a small increase in maximum speed can be obtained in many cases. This value is shown for information only. All values shown are based on the vehicle being well maintained and the engine in good overall condition.

Self Install in Only 15 Minutes

  • Easy to Install - We supply easy to follow instructions to allow simple installation of our fully plug and play system. Normal installation time is 15 to 30 minutes, depending on your vehicle. However if in doubt why not use our fully qualified installers to install it professionally for you. Just click on Find an installer.
  • Easily Return to Standard - If you ever want to revert the vehicle to standard tuning, you can do this in a few minutes by removing the diesel tuning box.
  • Nothing To Lose Policy - With our 28 day no quibble return and refund policy, you really have nothing to lose. If in this time you decide it is not what you wanted we will refund your purchase. You really have nothing to lose!
  • On/Off remote control - Particularly useful in adverse weather conditions or if you are lending the car to someone who you don't want to use the extra power!
  • Personal Tuning - With the availability of 9 preset tuning maps, you can select the one that suits YOUR engine and driving characteristics. A single, fixed pre-set tuning chip does not suit all drivers needs.
  • Transferable Technology - Being digital technology, the box can be transferred from one vehicle to the next. The Speedhawk system comes with a USB interface allowing you to easily update the tuning file yourself so you don't even need to send the tuning box back to us.

The Speedhawk diesel tuning box for common rail engines is one of the most advanced tuning boxes on the market. It uses innovative digital microprocessor technology to allow 9 pre-loaded tuning maps to be loaded onto the diesel tuning chip inside the box. Each map has slightly varying parameters to allow you to select the best one that suits your engine and driving style characteristics. The diesel tuning maps we create are designed to deliver a smooth and efficient increase in performance which improves the driveability of your vehicle dramatically.

We are dedicated to providing you with the best diesel tuning results possible from your engine which is why we are constantly working with the German manufacturers and our dedicated UK installers to improve and evolve the technology to suit the growing market. We also do not "follow the crowd" and ride on the wave of buzz words such as "Eco Tuning". Many companies will offer a choice between Eco and Power tuning. However we know this is just a marketing gimmick. Power and economy actually go hand in hand - our specialised diesel tuning maps are designed to increase the power and torque characteristics of your engine which in turn improves the efficiency. This added efficiency results in an improvement in MPG. Therefore you get the best power, torque AND fuel economy when you have the most efficient tuning map. It is the quality of our programmed tuning maps which really sets us apart from the rest.

The Safest form of Diesel Engine Tuning

  • Safe, Reliable Diesel Tuning - A Speedhawk Diesel Tuning Box works with your existing ECU to get the best from your engine without risk of damage.
  • Easily Revert to Standard Tuning - If you ever want to revert the vehicle to standard tuning, you can do this in a few minutes by disconnecting the diesel tuning box. No permanent changes are made to your ECU or engine. This also makes troubleshooting any problems easier, and protects your warranty.
  • 5 Year Warranty - We are so confident in the technology of the Speedhawk tuning box, we offer a massive 5 year warranty. If your unit suffers a component failure, we will replace it under warranty.

The Speedhawk Diesel Tuning Box is carefully designed to help you to get the most from your diesel engine. It works with the engine, adjusting the fuel pressure, airflow and fuel mixture to boost the power and torque. This type of diesel tuning talks to the ECU before it has adjusted the engine parameters. The engine is therefore still controlled by your existing diesel ECU chip, and the ECU will not adjust any settings outside of it's pre-defined safety settings.

Common Rail and Pumpe Duse diesel tuning boxes come with a selection of tuning maps pre-installed, allowing you to select the level of tuning applied. In some cases certain selections (especially the higher ones) can make engines run poorly, with smoke and uneven power delivery. Which setting works best with your specific engine depends on it's age, condition and history. However, as the tuning box is still going through your existing ECU, no permanent damage occurs, and turning the diesel tuning setting down until the best setting for your engine and driving style is reached allows you to obtain the full benefits of your new diesel tuning box.

Customer Reviews
Average customer rating: 92.5 (from 32 ratings)
Author: Timothy    Rating:

"I fitted the box in under 2 minutes and it has dramatically improved both the performance and economy of my vehicle. I switched through the programmes to find the one that suits me and now enjoy the increases it has given me."

Author: Ian    Rating:

"Purchased the tuning box for my 525d to give it the extra help it needed. Changed my car to a 123d and having exchanged e-mail with phpplus they offered me a step by step guide how to upload a new map. I've transferred the kit across which takes less than 3 minutes now (becoming a dab hand). I really like the fob function to enable me to switch it on or off to suit conditions or who may be behind the wheel. "

Author: Garry    Rating:

"Drove to Hungary from North Wales and really felt that the car was in better shape than from off the forecourt, the ave mpg was around 39mpg, pretty pants, it is now normally around 50+mpg on a run from the on board computer, however that is about as accurate as a drunk monkey trying to hit a cows butt with a banjo, but the mpg has increased by around 15% in real terms. So more responsive and better mpg, couldn't ask for more."

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