Welcome to TCM Tuning, Hampshire’s number one electronic and mechanical tuning experts.

Since we began trading in 2012, we have offered the very best in engine remapping, car diagnostics, ECU remapping, and car tuning to domestic clients and commercial customers alike, right across the county and beyond. This means that customers as far afield as Brighton, Chichester, Crawley, Fareham, Farnham, Guildford, Horsham, Petersfield, Portsmouth, Southampton, Winchester, Worthing – to name but a few – have been able to benefit from the dedication and experience of our team of veteran technicians.

car engine

What TCM Tuning can do for you

As one of the top car tuning and engine remapping services in the South East, there is a lot that we can do for you. Here are a few of our more popular services.

Unlock the hidden potential of your Automatic Transmission with our XHP Gearbox Maps! Available for over 120 BMW Models with 6 or 8-Speed Transmission,

XHP Flashtool is the world’s leading solution for enhancing your Auto – Transmission!

Improve the overall performance of your BMW, get access to hidden features and enjoy faster shifts

Car tuning

At its core, car tuning is the act of making your car engine more efficient and, consequently, more powerful. While much of that is done at an electronic level with our full ECU remapping service, there are also physical and mechanical steps we can take to improve performance.

our team work experience and awards
our experts identifying the car problem


ECU remapping (sometimes called engine remapping) is when the settings on your engine control unit (the ECU in question) is altered. This can vastly improve performance, and is a delicate operation that requires the right equipment and the right kind of expertise to get right. Luckily, at TCM Tuning, we have ample supplies of both. Whether you drive an Audi, BMW, Volkswagen, Bentley, Porsche, Seat, or pretty much anything else, we have the tools and the experience to do the job right.

Car diagnostics

A TCM Tuning we can run a complete car diagnostic check for you with our state-of-the-art equipment. Hooking it up to your vehicle’s onboard computer, we can soon detect any existing or potential flaws with your car.

our expert performing diagnostic check

Car security

As well as tuning, remapping, and diagnostics, we also install high-quality CANbus immobilisers from Autowatch. The Ghost II is the original, and still the best. It interacts directly with your car’s Controller Area Network, preventing it from activating without a special code. This sequence is chosen by you and means you needn’t worry about key or fob theft again.

Why choose TCM Tuning for your remapping needs?

As any of our thousands of satisfied clients across the Hampshire area will be happy to tell you, there are plenty of reasons for selecting TCM Tuning. Here are just a few of the more common ones, based on feedback from our customers…

Get in touch

For all your car tuning, ECU remapping, engine remapping, and car diagnostics needs in and around the Hampshire region, call TCM Tuning today on 01273 258010, 01403 618399, 01483 494746, 02380 082766 for your free, no-obligation quote.