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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.

We’ll Come Back to You
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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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.Nissan Navara in for an AdBlue solution. The AdBlue system wasn’t recognising the level in the tank, causing the countdown to keep dropping until the vehicle was close to not starting. The customer had already taken it to another garage, where they managed to give it an extra 50 miles, but the fault returned again. The customer then brought it to us, and we provided a permanent solution to get the vehicle back on the road properly.Scorpion cat-back exhaust fitted alongside a Stage 1 remap on this one. The car already had a cat-back system fitted before, but the customer wanted to change things up and go for something different. We fitted the new Scorpion system and it sounded spot on — a much nicer tone without being too over the top. While it was with us, we also carried out a Stage 1 remap to give the car improved performance, better throttle response and a more enjoyable drive overall.This Audi A4 came in for a DPF delete, EGR delete and Stage 1 remap. The car had been having issues with the DPF not regenerating properly, which had caused it to block up. The customer had already had a new EGR and turbo fitted, as the blocked DPF had been putting excessive back pressure and stress through the turbo system. While it was with us, we also carried out an interim service with fresh oil and filter. With DPF issues, oil dilution can be a concern, so it made sense to give the car a fresh start. Now the car has improved performance, smoother driveability and reduced stress on the components going forward.Stage 1 remap carried out on this Fiat 500L. The customer was looking for a bit more power and improved drivability, so we applied a Stage 1 software solution to suit the vehicle. A nice upgrade, giving it better response and a stronger pull while keeping it smooth for everyday driving.