Heavy duty & off-highway Diesel Fuel Injection

Since the introduction of legislation in the early 1990s, the industry has seen a significant reduction in emissions levels. In fact, it would take 15 heavy duty vehicles today to produce the same level of particulate emissions as just one vehicle did 20 years ago. At Delphi, we’ve been at the forefront of these improvements, delivering cleaner, greener and more fuel efficient commercial vehicles. We also provide the parts, tools and know-how to service these vehicles, right the first time, every time. Keeping them driving as good as new for life.
Parts diesel fuel systems

Rich OE legacy

Our heritage dates back to the legendary CAV brand, and the introduction of in-line and the iconic DPA pump – the best-selling rotary pump worldwide. Both were revolutionary for their time, setting new standards for reliability and power, and we’ve continued to push the boundaries ever since.

Three choices for fleets

By providing three choices – new, reman and repair – we can provide fleet managers with convenient service and maintenance at a very competitive cost.

Latest generation OE technology

Our latest generation F3 system takes engines beyond the 2021 global emissions and fuel economy regulations and through the next decade. Based on our proven Euro VI Common Rail technology and capable of 3,000 bar injection pressure, it delivers a substantial improvement in emissions, fuel economy and refinement for the lifetime of the engine.

OE-approved repair

In addition to new and remanufactured units, we also offer authorised repair through our global network of Delphi Diesel Centres. Replacing all wearable and performance critical parts, with like-for-like OE, and using OE-approved test plans and equipment, it offers a quality but economical solution.

Find your local diesel specialist here.


For an equally fast, yet more cost-effective turnaround we offer a range of remanufactured parts.  Available off-the-shelf, typically within one to two years of vehicle launch, they are built using OE parts, equipment and processes, and are calibrated to exacting OE specifications.

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OE expertise in the aftermarket

Of course, we’re committed to supporting these technologies in the aftermarket. We offer a range of new OE components, identical to those originally fitted, including our pioneering Electronic Unit Injector, Electronic Unit Pump, Smart injector and Multec® Common Rail.

Commercial vehicle diagnostics and test

Our dedicated diagnostic solution for trucks, buses and trailers, supports the key commercial vehicle manufacturers and systems, including the ability to carry out dosing tests, Adblue freeze monitoring calibration, system drain down and regeneration of the SCR system. We also offer a range of OE-approved test equipment for quick and accurate test and repair of the latest heavy duty applications.

Training from the OE experts

Designed to help you prepare for the very latest heavy duty diesel fuel injection technologies, our extensive training programme covers the repair of key systems, including Electronic Unit Injector and Pump and Smart injectors. Learn more about our training.

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The Delphi Difference

  • 100 years of OE experience, supplier to the world’s top automakers
  • OE heritage and knowledge built into every aftermarket part
  • Comprehensive portfolio for a wide range of vehicles and model years
  • Streamlined SKUs for easy inventory management
  • Support through tools, tips and training

Related product resources and downloads

How it Works Resource Banner
Fuel Injection 2 min read

Remanufactured pumps and injectors: a greener solution

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Diesel Fuel Systems Reman How it works 2 min read

Resource Highlights

In this article, you find out about Delphi's efforts into creating a sustainable automotive industry. 

March is Earth Hour! And whilst we’ll be doing our bit on 30 March from 8.30 to 9.30pm, for us it’s so much more than just one hour. In fact, at Delphi our goal is very simple - to create a sustainable automotive industry. And we do that in many ways - every hour, of every day, of every year. One example that best illustrates this in the aftermarket is our remanufactured range of diesel pumps and injectors for passenger cars, light and heavy-duty commercial vehicles and even off-highway applications...

Whilst we’ll always offer new OE pumps and injectors, our remanufactured range is both kinder to the environment and the vehicle owner’s wallet. By reusing the core, the green friendly solution saves between 50 and 70 percent of the resources, and consumes around 85 percent less energy, compared with the new equivalent. Case in point, in the past 10 years – since 2008 – we’ve collected more than 3000 tonnes of core, which we’ve used in remanufactured pumps and injectors. But it’s not only the environment that benefits. Since it uses less new parts, it is more cost effective, providing savings for the driver too. 


However, this is where the savings end. Because we do not skimp on quality. Far from it! Made at one of our four regional remanufacturing facilities - Troy USA, Gillingham UK, Piracicaba Brazil and Yantai China – every pump and injector undergoes a rigorous seven-step process including core inspection, product disassembly, cleaning, further inspection, replacement of parts with like-for-like OE, assembly and finally test and calibration up to 1000 test plan points. This is in sharp contrast to other so-called remanufacturers or repairers who may simply replace the broken or damaged parts, or worse still, just clean and polish the pump or injector, resulting in a whole host of potential issues including poor fuel economy, increased emissions and sluggish performance. Only through an OE authorised approach, like ours, can we be sure the parts are rebuilt as good as new, and perform just like the OE. 

Delphi’s remanufactured parts are typically available within two years of vehicle launch. This ensures, that as the vehicle moves out of the VM network and into the aftermarket, independent garages will be able to provide a competitive alternative to new, as well as a choice for the end user. And with over 280 parts across more than 10 technologies, backed by a two-year warranty, our range will cover all your needs too.

So, do your bit this Earth Hour, and every other hour, by choosing Delphi for environmentally and budget friendly pumps and injectors, guaranteed to perform just like new.

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