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Release the true power, economy and driveability of your Fendt - safely, easily and in minutes with a CHIP Express™ plug-in upgrade!
After figures show the power your vehicle will produce on the supplied settings. Max figures show the power your vehicle could produce on a higher setting. More Information
All chips come pre-set for optimal power and economy so adjustment is not necessary: you can simply plug-in and enjoy! Not all vehicles will achieve Max figures when on a higher setting, most standard vehicles will achieve a power between After and Max figures. To fine-tune your system simply press the HIGH or LOW buttons on the keypad to make small incremental adjustments above or below the supplied setting, easy to do and fully explained in instructions supplied.
The only tuning kit that comes with everything you need:
If you’re not delighted simply return goods postmarked within 28 days for a 100% refund.
If you are ordering from outside the UK the £ Sterling amount will automatically be converted into your local currency by PayPal or your card issuer using up-to-the-minute, competitive exchange rates, this will be shown on your billing statement. A full invoice will then be sent electronically via email for safekeeping and printing.
Although proven to be extremely reliable we want to ensure your investment is fully protected and so offer a choice of warranties for complete peace of mind. Full terms on our class leading "replace or repair" warranty scheme can be found on our Terms & Conditions page.
Achieve a guaranteed increase in performance from a name synonymous with digital diesel tuning systems – CHIP Express™.
Unlike "generic" diesel tuning systems, this advanced, self fit chip will be programmed specifically to optimise your Fendt 939 SCR 7.8 Tier 3B / 4A. And because it works in conjunction with your on-board computer rather than altering it, all engine safety functions remain operational. What's more, the system can be easily unplugged, leaving no trace of fitment, returning your vehicle to factory standard at any time.
The CHIP Express™ system simply plugs in using connectors which are identical to those originally fitted by the manufacturer - there are no wires to cut, just follow the supplied photo-instructions for your specific engine and you'll have the job done in minutes. Once installed, you will immediately feel the difference. Your tractor will cope better when faced with steep hills, big loads and muddy terrain or when being used for heavy PTO work; this is where the lack of low-end torque is often a real limiting factor. Fitting a CHIP Express™ tuning system will transform performance, allowing taller gears and less throttle to be used at lower RPMs, reducing fuel consumption and providing you with more speed where required, this can save precious time where often the window for ploughing, harrowing and harvesting is small. The system also works on tractors fitted with the factory standard POWER BOOST function, giving you further power over supplied figures. Remember while most tuning companies aim to provide maximum power our aim is to improve your tractors flexibility, providing a wider spread of usable performance where you need it most!
By making your engine significantly more fuel-efficient, the CHIP Express™ digital tuning system means you can achieve substantially better economy from your SCR 7.8 Tier 3B / 4A too. You'll drive on a smaller throttle opening for a given speed and change gear less, getting you further on a tank of diesel!
* Typical economy results between 8-16% yet can produce up to 20% depending on engine tolerances, driving style and conditions. CHIP Express™ diesel tuning chips may also increase the maximum speed of your vehicle by up to 5%; applies to non speed limited vehicles only.
Vehicle manufacturers are forced to compromise when they set up the engine's ECU, to create vehicles which will operate in a wide variety of markets and conditions.
To meet all these different needs, they re-program the vehicle's ECU to change the engine requirements. Now, thanks to CHIP Express™ class-leading, state of the art solutions, you can benefit from greater low-down torque for improved pulling power, higher output for better out-and-out performance, and better fuel economy!
It takes minutes to order and minutes to fit, so why wait? Buy now with complete confidence!
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“As do many, I took the 'if it sounds too good to be true, it probably is' approach to performance chips. But CHIP Express were recommended by an impeccable source who had had experience with their product on my model of car - a Citroën C6 with the 2.7 HDi twin turbo diesel. Following a first rate response to a query, the product has delivered in spades. Ten days and more than 1000 miles of mixed town, country, low and high speed driving later I am certainly getting more than 10% more from a gallon, and probably 15%, and the performance is markedly better. Low speed response is immediate and has eradicated what I took to be baked-in lag in a big automatic turbo diesel, and mid-range acceleration is silky smooth, including up inclines. A very good car has been turned into the excellent car I had hoped for all along.”
Simon from Ketteringham
Citroen C6 2.7 HDi 204
“Be assured, this is NO gimmick. Arrived yesterday (less then 24 hours after the order was placed) and fitted today. The fitting was easy especially with the photos and instructions sent with the chip. The first thing I noticed was the responsiveness of the engine from a standing start, no more lag. I then went on a 30 minute drive both motorway and sideroads and my average fuel consumption went UP from 33.3mpg to 38.7mpg. My motorway speed varied from 60 to 85mph and the sideroads from zero to 40mph. I am so pleased with the whole result. This is worth every single penny paid. Thank you!”
Edwin from Bridgend
Ford Kuga MK2 2.0 TDCi 163
“May I congratulate you on this diesel tuning product as it has made a noticeable difference to my Land Rover Discovery. I have tried other diesel tuning boxes for my previous vehicles (Kia Sorento, Peugeot 206 and Vauxhall Vectra)... and they all produced slight engine stuttering under certain load conditions. The CHIP Express system does not show any evidence of this and is equal to the likes of an ECU remap (which I have also had done before) for smoothness and noticeable power gains. This would be the only diesel tuning product I would recommend.”
James from Callington
Land Rover Discovery (3) 2.7 TDV6 190
“A friend recommended one of your "gadgets" a year ago and being not-very-techno (but Scottish and keen to save money!) I bought one. The gizmo has TRANSFORMED the performance of my Land Rover Freelander 2 TD4 AND improved the fuel economy by a genuine 15%; so much so that I have bought another one for our Freelander 2 SD4 which is now a REAL Q-car! (And of course saves fuel...) I have never written a review before (though strangely I do read them and take notice of them, whilst half-believing that they are written by the owner's chums!) so to have made me pick up pen & paper so to speak - I MUST be delighted! Thanks for making technology so simple and so successful!”
Andrew from Lochwinnoch
Land Rover Freelander (2) SD4 190
“Your customer service, speed at which you deal with questions and chip (most importantly) are second to none. This is the 3rd variation of the chip that I have run, not only do I see the fuel savings made each and every time I fill up but I also feel the changes in the increased performance too. Far too often people only feel the need to leave negative feedback on a product, it's very rare that people take the time to leave positive comments however on this occasion I feel compelled to do so. A brilliant product and one that I highly recommend should you want to make the most of your cars potential performance and make a fuel saving to add into the bargain. What's not to like?! It's been a pleasure dealing with the team at Chip Express, I just wish everyone I dealt with in life was this professional! Thank you.”
Lee from Halifax
BMW 1 Series F20 120d 190
“I must say l'm delighted with the improvement from your chip, its on the standard settings and the difference in the car is amazing!!! I have a smile on my face every time I get in the car, and there is about 5-7mpg improvement. With the mileage l do, l can see myself getting my money back in no time at all. So if your a doubter like me, don't be because its one of the best things l've ever bought!!!”
Ian from Manchester
Audi A6 MK4 3.0 BiTDI 313