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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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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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AdBlue software solution carried out on this Citroën. The customer was having ongoing AdBlue-related issues, so this was completed via OBD with no ECU removal required. Once the software process was carried out, we completed our checks and got everything sorted. A clean job completed and another AdBlue fault dealt with.Vauxhall Combo in for an AdBlue software solution. The customer had previously had an AdBlue issue repaired, but unfortunately the fault returned around two months later and started causing problems again. On this one, the ECU needed to be removed for bench work. Once the ECU was out, we were able to carry out the required software process, refit everything and return the vehicle to the customer. A clean job completed and another AdBlue-related issue dealt with.Stage 1 remap carried out on this BMW 120d. The customer was after a bit more performance, so we carried this one out via OBD with no ECU removal needed. A good increase in power and torque, giving the car much better response and stronger pull while still keeping it smooth for daily driving.Here we have a Jaguar XF in for a performance remap. The customer was looking for more power and better drivability, as the car felt a bit flat in places. On this one, the ECU needed to be tuned via bench, meaning we had to access the ECU pins directly in order to read and write the file safely. Once the ECU was read, we carried out the remap and achieved a strong improvement in performance. The car now feels much more responsive compared to standard, with better power delivery and the flat spots the customer was experiencing now smoothed out.BMW M4 Competition in for a Ridgeline Motorsport Ring Spec GT4 rear wing. This one involved a fair bit of measuring and prep before any drilling. We carefully marked out the boot lid to make sure the wing sat in the correct position, then measured everything properly to get the drill holes lined up as accurately as possible. Once marked, we drilled through the boot lid and removed the inner boot trim to gain access from underneath. This allowed us to run the bolts through properly and tighten everything down securely. We also sealed around the bolt holes with silicone to help keep everything watertight. Once fitted, the wing felt solid with no flex in the mounts and sat securely on the car. While it was with us, we also remounted the number plates as they were starting to peel off, and re-seated the rear Competition badge as the spacing needed adjusting. Really happy with how this turned out — it completely changes the rear end and gives the car a much more aggressive track-focused look.BMW 420i in for upgraded charge pipes. The original charge pipes are plastic, which can become a weak point under load and heat, especially once the car is tuned or driven hard. These upgraded aluminium charge pipes are much stronger and help reduce the risk of cracking, splitting, or boost leaks. The new pipes were fitted with fresh O-rings and seated correctly to ensure a secure fitment and proper seal. A very nice overall setup and a worthwhile upgrade for reliability and performance.