Treharne Automotive Engineering



Treharne Automotive Engineering are specialists in electromechanical systems, working closely with OEMs to supply engineering, diagnostic and staffing solutions in order to solve problems and realize innovation.
We have an established reputation as a reliable and flexible development partner with proven expertise to effectively address a wide variety of current and future challenges within the automotive industry.
With our highly skilled workforce at the heart of our business philosophy, we are able to compete on the global stage, providing products and services of consistently high quality, while remaining adaptive to industry requirements.
As a turnkey solutions provider, we pride ourselves on quick turnaround times and a dynamic approach to problem solving. Our R&D activities which run alongside a variety of ongoing projects, ensure that we lead the way with innovation.


Electrical Hardware Software Development Automotive Electronics
Treharne Automotive Engineering provide bespoke electrics and wiring solutions for almost any application, from automotive diagnostic and live data gathering tools to module re-programming equipment and many more. We develop electrical and electronic hardware from prototype through to production. Our experience in software programming is vast with our dedicated software engineers utilising the likes of C, Embedded C, Visual basic, and Assembly to name but a few. We specialise in electronics appertaining to the automotive industry, designing and manufacturing electronics and control systems for both the engineering and manufacturing sectors of the industry.
Project Management Product Design Problem Solving
We provide excellent project management services, developing project plans to meet/maintain stringent time scales and key objectives. Multidiscipline software background allows us to create bespoke software for an application as well as integrating and enhancing existing software applications with added diagnostics, complex algorithms, and any requirements the customer might have. Our product design and development service incorporates the complete product development cycle, from initial consultation through to full scale project implementation. We have a dedicated product design team whose skills encompass the entire product design cycle to provide a comprehensive service.
The engineering design within the development service, which includes the relevant hardware (enclosure, any mechanical components,etc) and the electronics design, is carried out in house which makes the turn around of the process a lot quicker.
Our wide range of experience in problem solving, together with a wealth of expertise in automotive fault diagnostics and engineering solutions, enables us to apply foresight to potential issues and provide solutions to existing problems.



High Voltage Battery Tester

The High Voltage Battery Tester (HVBT) is a complete traction battery test and analysis solution allowing the complete diagnosis, repair, and conīŦrmation of correct reassembly in a fully automated and guided process. It can be used to check state of health (SOH), diagnose faulty battery packs and isolate faulty modules or bus bars. Cooling system and pack seal integrity can be tested using the integrated pressure tester. Analysis and diagnosis of heat management issues can be performed using the thermal map viewer. This feature shows graphically the distribution of heat within the pack.
The High Voltage Battery Tester also emulates the host vehicles network allowing for complete control of the batteries functionality including contactor control, HVIL monitoring, Isolation status, and DTC read. The HVBT is capable of module balancing prior to re-installation into the pack as well as vehicle charging and pack charging independently of the vehicle using its on-board charging systems.

  HVB - High Voltage Battery Tester


Inline Diagnostic Unit (IDU)

Initially developed to reduce the high occurrence of 'no fault found' issues on replaced high value components such as turbo chargers and EGR valves. The IDU2 uniquely, allows for the unit to be connected into a vehicles circuit to interrogate both the component and wiring harness independently without intrusive pin point testing or unnecessary replacement of parts. Capable of controlling and monitoring complex systems found within today's Automotive software driven environment, the IDU2 has proven to reduce labour times and ensure right first time fixes when applied within a workshop environment.

  IDU - Inline Diagnostic Unit

Noise, Vibration & Harshness Sensor (NVH)

The Noise, Vibration & Harshness Sensor is a Bluetooth® enabled high bandwidth accelerometer capable of transmitting vibration (acceleration) data from a suspected faulty part to a separate computer for analysis. It has a steadily growing number of uses from diagnosing a differential gear and bearing faults to pin pointing the cause of steering wheel wobble.

  NVH - Noise, Vibration and Harshness Sensor

DPF Monitor

The Diesel Particulate Filter Monitor is a device which provides a real time display (LCD) of Diesel Particulate Filter fill level and burn status to ensure a burn is achieved at the desired time. This allows car owners to plan for a duration of slow or stop start driving without risking performance issues caused by an overly full DPF.

Non Intrusive Current Shunt

Designed to further enhance the capabilities of the IDU/IDU2 the non intrusive current shunt gives the IDU/IDU2 the ability to measure current passing through the fuse box, thereby indirectly providing a current trace for that system, all without the need to gain direct access to the part on test.

Misfire Generator

The Misfire Generator (MFG) is a compact, handheld misfire generator providing a robust means to generate consistent and repeatable misfire in 4, 6 or 8 cylinder engines. The MFG is an industry leading tool used by manufacturers and government agencies globally to demonstrate misfire as part of in-use testing and misfire strategy development.

  MFG - Misfire Generator


Do you require something bespoke? Please click on the link below to get in touch and find out how we can provide a tailored solution to fulfil your requirements.


We often have new job opportunities opening at Treharne Automotive Engineering and we would be very happy to hear from engineers and technicians who wish to join a developing Engineering Company.

Roles can be based either at Treharne Automotive Engineering in South Wales or at other engineering sites throughout the UK. Please contact us to discuss the possibilities.


Treharne Automotive
Treharne Workshops
Llanelli Gate, Dafen
SA14 8LQ
United Kingdom
01554 775 938

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