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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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Ford Transit Custom in for a Stage 1 remap. These newer models are now readable on the bench without needing an ECU unlock, meaning we can carry out the work in-house without sending the ECU away. This one also had the common security cage around the ECU, which adds a bit of extra time to the job, but once accessed we were able to complete the Stage 1 calibration and get it back on the road with improved performance and drivability.Stage 2 completed on this VW Polo GT. The customer has been building the car himself and already had the supporting mods fitted, so it came to us for the software to suit. We applied a Stage 2 engine calibration along with a DSG gearbox tune, giving the car stronger performance, sharper response and improved drivability to match the setup.Stage 2 completed on this BMW 330d. This one had the supporting mods to suit, including a decat pipe, swirl flap delete, EGR delete, upgraded intercooler and upgraded air intake. We then applied a Stage 2 calibration to give it more power, stronger torque and better drivability while keeping everything smooth and usable.Stage 1 completed on this VW Polo. The customer was after a bit more performance and better drivability, so we provided a Stage 1 solution to safely increase power and torque while keeping everything within the car’s limits. A nice upgrade that makes the car feel much more responsive on the road.Citroën Berlingo in for an Eco map and AdBlue solution. The customer was having issues with the AdBlue system, so we provided a solution to get the vehicle back on the road properly. We also applied an Eco map to help improve drivability and fuel efficiency, making the van smoother to drive while keeping it practical for everyday use.Stage 1 completed on this Land Rover Discovery. The customer was looking for improved performance and better drivability, so we applied a Stage 1 calibration to suit the vehicle. This helps improve throttle response, torque delivery and overall pulling power, making the car feel much smoother and more responsive on the road. A nice upgrade for a big vehicle like this, giving it that extra bit of performance while keeping everything within safe limits.