Thomas Group

we know diesel

Visit Diesel Parts Direct

Specialists in diesel fuel injection systems & fuel additives.

Trading for over 40 years

Thomas Group are based in Ashford, Kent and have been in the fuel injection business for over forty years. As a specialist in diesel fuel injection services the company has partnered all the major manufacturers. Beginning with Bosch in 1977, and adding Lucas, Delphi, Denso, Stanadyne, Siemens VDO, Parker Racor, Diesel Forward, Fuel Manager and Hopkins Manufacturing along the way. 

Experience, training and a good knowledge of the latest technology is vital in this industry. From our repair workshops to our parts distribution centre we have that in abundance. Since the company’s early beginnings, technology and emission standards have been revolutionised, from the smoky seventies to today’s tight legislation. This revolution is not yet over, with ever more efficient engines and systems. This makes your fuel system the sophisticated and expensive heartbeat of your engine.

Fuel quality is more important than ever. Modern electronic, high pressure fuel systems must have clean fuel that complies to ISO standards. That means buying good quality fuel and filtration systems. Good fuel will extend the life of your engine and diesel fuel system. We can help with that.

Our ethos is quality. Genuine OE (original equipment) parts, manufacturer training, official tools and software combined with first class customer service. Gaining customer feedback to help us constantly Improve is our continual aim. If you need technical support with a part, we will try to give you the information you need.

Our markets are anywhere you can find diesel fuel injection. That could be construction, marine, agriculture, power generation, rail, cars, trucks and so on.

Our customers are worldwide. With our varied shipping and payment options we try to make buying from us as easy as possible. An on-line trade account will give you access to thousands of products. We will stock what you need, and we will also try to find rare and obsolete parts through our network of contacts.


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There has never been a more critical time to look after your fuel

Thomas Group has become known worldwide for its technical expertise and parts sales for diesel fuel injection services & related products within the automotive, off highway, agriculture, plant, power generation, marine and construction Industries.

As an authorised distributor and repairer of OE brands such as Yanmar • Bosch • Delphi • Stanadyne and Denso, we consider ourselves specialists in the very latest common rail diesel injection technology.

Thomas Group brings its substantial diesel experience and knowledge to the Fuel Quality, Fuel Filtration and Fuel Additive sector partnering; Parker Racor • Delphi • Stanadyne • Bosch and Mahle Brands with complete factory support.

Latest Information
You can also click the 'Downloads' Tab at the top of the page for all of our information brochures and promotion literature.

To become an Account Customer click on the link below to complete the form OR call us on: 01233 642816

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Blog Posts

DENSO discusses oxygen sensors in latest video

One of the most important elements within modern engine management systems. DENSO has released a video which explains the vital job in managing emissions and performance that oxygen sensors fulfil. Vehicle manufacturers must adhere to stricter emissions targets, and the sensors themselves allow the engine control unit to perform a growing list of tasks. Oxygen […]

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Thomas Injection-Delphi Eco-fix injector repair

By Graham Williams, Workshop Manager, Thomas Injection Vehicles covered:  All that use Delphi injectors but particularly Renault 1.5, Ford Mondeo, Jaguar, Kia. Fault:  Long cranking periods when engine cold. Fords will reduce power and light engine  malfunction lamp under load e.g. accelerating uphill or overtaking. Switching off and then back on will bring back normal […]

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