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Diesel Parts & Repair

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We specialise in the testing and repair of diesel fuel systems of all varieties – from a family car to a large fishing boat, we can help!

Tyrone Diesel Systems is a well established business specialising in diesel fuel systems and has built up an enviable reputation over the last 40 years. We pride ourselves on our commitment to provide a professional and speedy service at all times, whilst maintaining the highest quality of work. 

We are the only fully-authorised Bosch Diesel Centre, Delphi Diesel Centre, Denso Diesel Service, Continental VDO Diesel Repair Service and Stanadyne Service Dealer in the whole of Northern Ireland. 

We specialise in the test, supply and remanufacture of diesel pumps and injectors, and of all other parts related to the fuel system.

The new premises houses one of the most modern, well equipped and spacious diesel workshops which is fully equipped with state of the art equipment for working with the latest diesel system technologies.

The quality service which customers receive can be attributed to the specialist staff, and their years of experience and training in partnership with the original manufacturers.

We have a comprehensive stock of parts, and of new or exchange pumps and injectors. Many of these are available on our web store, but if you cannot find what you are looking for, please get in touch.


Tyrone Diesel Systems is a family-owned business which Jim McGrenaghan started over 40 years ago. He started the business at a small shed at his family home. Here you got your pump repaired and a cup of tea made by his mother, Mary B.

In 1985, he purchased a small premises in Campsie Avenue, Omagh. Now being in a central town, he obtained the Lucas CAV agency, now known as Delphi.

After 10 years there, he purchased a site on the Dromore Road and built a purpose-built premises where he was able to obtain the Bosch, Stanadyne, Continental, and Denso agencies.

His son, Conor, joined the business after he completed a degree in Physics at the University of Oxford. This allowed the business to grow further and embrace new technologies and ideas. The other members of the family, Sally, Sara and James are frequently conscripted in to helping out in times of need.

In 2021, due to increasing workload and need for more space, Jim and Conor decided to purchase larger premises nearby. The building was then modified to fit the specialised needs of the business.

During all this time, the business has kept up to date with the rapid evolution of diesel fuel system technologies. Staff have received specialist training from the OE manufacturers and use the latest authorised test and calibration equipment.


If you need help find a part or need more information please feel free to fill out the form below and one of our diesel experts will get back to you promptly.



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