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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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Ignition coils and spark plugs replaced on this MINI after it came in running rough. Following diagnosis, the issue was traced to the ignition coils and spark plugs, so both were changed. Now running exactly as it should again.EGR issue with this one, the EGR was stuck, causing power loss at the top end and triggering engine codes. Under load, the car would misbehave. We ensured the EGR was closed, checked the live data, and deleted the EGR.Facing AdBlue problems, the pickup experienced issues with its countdown timer due to a glitch. We pinpointed the issue, performed the required software update, and returned it to service without the risk of being stopped. The AdBlue system remained enabled.Stage 1 ECU and TCU DSG tune on this VW Caddy. Customer wanted better performance and a gearbox calibration to match, so we sharpened both the engine and transmission setup to make the van feel much more responsive all round. Better pull, improved shift strategy, and a much nicer drive overall.Mini in for a Stage 1 calibration after an engine rebuild and upgraded cam. The customer felt the car was still lacking through the mid range and upper revs, so the aim here was to optimise the ECU calibration to better suit the hardware setup and improve the overall power delivery. Being a naturally aspirated engine, the gains are never as dramatic as a turbo vehicle, as there’s no boost pressure to increase, but there is still plenty to be gained by refining ignition timing, throttle mapping, load targets, and fuelling where safe and appropriate. The result is a much cleaner and more responsive power curve, improved throttle response, stronger pull through the rev range, and a car that feels far more sorted and enjoyable to drive.On this Fiat Ducato, the customer had already had the DPF deleted, but the software side hadn’t been done properly, which was causing running issues and sending the van into limp mode. We carried out the software work needed to match the DPF delete and get everything working as it should. After that, the issues were gone and the van was back to running as it should again.