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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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Toyota Yaris in for an EGR delete and Eco map. The vehicle was having EGR-related issues, so after carrying out diagnostics and confirming the best route forward, we applied a software solution to remove the EGR function safely. Alongside this, we added an Eco map to improve drivability, smoother torque delivery, and help the car run more efficiently day-to-day. A good setup for better reliability, improved smoothness, and potential fuel savings over time.Audi A3 in for a Stage 1 remap and gearbox tune. The customer was after stronger performance, smoother drivability, and a better overall feel from the car. With this setup, the Stage 1 tune improves the power and torque delivery, while the gearbox tune helps the car make better use of that extra performance with sharper, smoother gear changes. A great upgrade for making the A3 feel more responsive, refined, and enjoyable to drive day-to-day.Eco map and DSG tune completed on this VW Transporter. The customer was looking for better fuel economy, improved drivability, and a smoother overall drive. We applied an Eco calibration alongside a DSG tune to help optimise how the engine and gearbox work together. With smoother gear changes, better torque delivery and improved efficiency, this Transporter should now feel nicer to drive day-to-day, with potential fuel savings over time — especially with the price of fuel at the moment.Fitted these Carbon GT4 side canards onto this BMW M4. The canards give the front end a much more aggressive GT-style look and add a nice carbon detail to the bumper.Had this Polo GTI in for a replacement steering wheel clock spring. The vehicle had issues with the steering wheel buttons not working, along with an airbag light caused by the faulty clock spring. We replaced the unit and also fitted a new set of drop links while it was with us.Stage 1 completed on this Porsche Panamera 4. The customer was looking for a bit more performance from the car, so we applied a safe Stage 1 calibration to bring out more power and torque from the V6 while keeping everything within sensible limits.