About Us

ASM Truck Diagnostics is a family-owned and managed HGV and commercial vehicle repairs and specialist vehicle hire company operating from Brentwood, Essex. We have a fleet of technicians with fully equipped service vans available to go to customers nationwide.

We started primarily as a mobile service, with three fully equipped service vans offering on-site vehicle maintenance and repairs. We later expanded our facilities with fully equipped workshops at our Brentwood base.

Our core activity is the service, repair and maintenance of commercial vehicle fleets, including VOSA required safety inspections, and MOT preparation and presentation. We have contracts covering anything from a single light van, through to 20+ mixed-vehicle fleets, covering multiple depots nationwide.

ASM Truck Diagnostics provide a premium vehicle maintenance program for a single vehicle or entire commercial vehicle fleet, in one simple step, ensuring that your fleet complies with VOSA fleet vehicle operator license obligations, enabling you to manage commercial fleet costs with a single commercial vehicle maintenance contract for piece of mind.


Quality – Job #1

At ASM Truck Diagnostics Limited, quality and service are priority number #1. All work comes with a full guarantee and a strong commitment to customer service, building a strong, lasting and trustworthy relationship with our customers. We keep our customers updated with the progress of the work, treating our customers how we would like to be treated, working hard to combine engineering expertise with outstanding service.


Our Services

ASM Truck Diagnostics can undertake commercial vehicle servicing to manufacturer standards, fully compliant with VOSA obligations, on all makes and models of commercial vehicles and trailers. We can also arrange scheduled servicing with both fixed and contract rates. We can service vehicles of any size – from a van or minibus to a large commercial HGV.

ASM Truck Diagnostics Mobile HGV Service engineers provide a professional and efficient mobile service, ensuring your vehicles are back on the road with minimal down-time. We offer prompt on-site diagnosis of faults, with on-site repairs carried out wherever possible, at a location that is convenient to you

ASM Truck Diagnostics can provide a wide range of high-quality Municipal Vehicle Hire vehicles, fitted with the latest technological enhancements, all available for short to long-term hire, to local authorities and the private sector. We pride ourselves on our vehicles and our reputation for providing first-class, reliable municipal vehicle hire services.

ASM Truck Diagnostics offer reliable vehicle diagnostics services for commercial vehicles. Our team of automotive technicians are able to investigate engine diagnostics issues to help identify and rectify any problems with your vehicle. Diagnostics can save time and money by identifying problems with your vehicle’s engine sooner, rather than later.

ASM Truck Diagnostics can carry out HGV MOT pre-check, preparation and presentation for VOSA tests for commercial vehicles weighing over 3.5 tonnes. Our services include HGV and trailer preparation, HGV brake testing and rolling, HGV Headlight aim and MOT testing .

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