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Specialist ECU, TCU & Performance Tuning

Professional in-house tuning, servicing and diagnostics from our Horsham workshop using Autotuner and Alientech KESS3 for safe, reliable results.

  • ECU unlocks for selected 2022+ BMW, VW Group & Mercedes
  • TCU mapping for DSG, ZF and other autoboxes
  • Stage 1 / Stage 2 tuning and bespoke packages
  • DPF / EGR / AdBlue solutions where applicable
  • Vehicle servicing, DSG servicing & performance upgrades
  • OBD flash on-site • Bench ECU mapping available
Professional Workshop ECU & TCU Specialists Advanced Diagnostics
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Specialist Workshop Services | RPM Sussex
Specialist Workshop Services

Built around performance, diagnostics, and specialist workshop support

From ECU & TCU remapping to advanced diagnostics and Stage 2 performance upgrades, RPM Sussex offers workshop-based services tailored to BMW and VW Group vehicles.

ECU and TCU remapping equipment at RPM Sussex

ECU & TCU Remapping

Workshop-based engine and gearbox tuning for selected BMW and VW Group vehicles, including OBD and bench mapping where required.

Stage 1 from £240 OBD & Bench DSG / TCU Support BMW & VW Group
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Vehicle diagnostics and software investigation service

Diagnostics & Software Solutions

Fault diagnosis, coding, software investigation, and specialist support for warning lights, drivability issues, and platform-specific vehicle problems.

Fault Finding Coding Software Investigation Workshop Support
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Stage 2 performance upgrades and tuning at RPM Sussex

Performance Upgrades

Stage 2 package routes combining the right supporting hardware with a matching ECU calibration, tailored to your vehicle, current mods, and goals.

Stage 2 Packages Hardware + Software BMW & VW Group 0% Payment Assist
Stage 2 Parts

Service Overview

From OBD and bench ECU remapping to diesel ECU solutions, performance upgrades and servicing — planned, installed and supported in-house.

BMW & VAG Specialists OBD & Bench Mapping 0% Instalments Transparent Pricing

ECU & TCU Remapping

Eco / Blend (Popular) / Performance calibrations written via OBD or bench (ECU out) as required — smooth, dependable gains tailored to your goal.

  • OBD & bench capability in-house
  • Pre-tune health check & backup
  • Stage 1 from £240
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Delete & Solutions

EGR / AdBlue / DPF ECU solutions to resolve persistent faults and limp-mode strategies. Supplied strictly for off-road/motorsport use.

  • OBD where supported; bench if required
  • Stop constant regens & warning lights
  • From £260 per system
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Performance Upgrades

Supply & fit — intercoolers, intakes, turbo inlets, downpipes and exhausts — matched to your map for reliable, repeatable performance.

  • Neat fitment & correct torque specs
  • Transparent parts & labour quotes
  • Book for a quote
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Car & DSG Servicing

Quality oils and filters, DSG gearbox servicing, fault scans and pre-tune checks to keep your car healthy before and after calibration.

  • Health check & diagnostics
  • DSG servicing available
  • Book online
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Get a Quote or Check Compatibility

Choose Your Service
Select the service you’re interested in, whether that’s Stage 1 remapping, Stage 2, exhaust upgrades, servicing, diagnostics, or one of our specialist ECU solutions.

Add Your Vehicle & Contact Details
Enter your registration number, contact details, and a few notes about what you’d like done. The more detail you include, the easier it is for us to point you in the right direction and give accurate advice.

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Once we’ve reviewed your enquiry, we’ll get back to you with the best route for your vehicle, along with pricing or the next steps.

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Flexible Payment Plans

Manage your costs effortlessly with Payment Assist. Enjoy the ease of splitting payments into 3 equal monthly installments with zero interest.

  • ✔ No hidden fees
  • ✔ Quick & easy approval
  • ✔ Hassle-free payment process

Example Payment Plans

£240 3 x £80
£480 3 x £160
£900 3 x £300

Interested? Let us know and explore your finance options today!

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Stage 2 and DSG tune completed on this Golf R Estate. For this build we fitted an Airtec intercooler, Milltek downpipe, and an induction kit to get the car ready for the next step properly. A long job with plenty involved, but well worth it once everything was fitted up and calibrated as it should be. The result is a much stronger, sharper car with improved airflow, better cooling, and the gearbox tuned to match the extra performance. A proper transformation and a great example of doing Stage 2 the right way with the supporting hardware in place.BMW in with us for a Stage 1 remap. This one came in looking for a bit more from the stock setup, so we carried out our Stage 1 software upgrade to improve power, torque and overall drivability. A great upgrade for anyone wanting stronger pull through the rev range and a more responsive drive, while keeping it smooth for everyday use.Mini in with us for some maintenance work and diagnostics This one came in running rough, so we carried out fault finding and got to work putting it right. After checking things over, we replaced the faulty ignition components and got it running properly again. Now back to how it should be — smooth, responsive and ready to go.Transit in today for a little more drivability and efficiency This one came in for an eco tune, giving it smoother power delivery, improved low-down torque and better fuel economy for day-to-day use. Perfect for a working van that spends its life on the road. A nice subtle upgrade that makes a real difference where it matters mostEco map and AdBlue delete carried out on this one. The customer had been having intermittent AdBlue issues, so we provided a solution for that. With fuel prices being so high at the moment, we also added an eco map to help improve fuel economy by up to around 10%, depending on how the vehicle is driven.BMWs from around 2021 onwards are commonly ECU locked, which means they require an unlock before tuning can be carried out. We work with Autotuner tools to provide this service. Autotuner are industry leaders and offer mail-in unlock solutions for a wide range of vehicles. Get in touch today to see how we can help.