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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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BMW 220d in for a Stage 1 remap and gearbox tune, both completed via OBD. The Stage 1 delivered a strong increase in power and torque, while the gearbox software improved shift speed, smoothness and overall responsiveness. Combined, the upgrades have completely transformed the way the car drives, giving it stronger acceleration, sharper gear changes and a much more enjoyable overall driving experience.VW Transporter in for a Stage 1 ECU remap and DSG TCU gearbox tune, both completed via OBD. The Stage 1 delivered a strong improvement in power, torque and overall drivability, while the gearbox tune sharpened and smoothed out the gear changes. These DSG gearboxes can sometimes feel hesitant or slow to respond, but the TCU software helps improve shift timing, responsiveness and torque delivery. Combined with the Stage 1, it completely transforms how the van drives—smoother, stronger and far more responsive.Range Rover Velar in for an AdBlue system solution. The vehicle arrived with a faulty AdBlue level sensor, NOx-related faults, an engine management light and a no-start countdown. After carrying out diagnostics, we found crystallisation within the system. We reset the AdBlue system and completed the required software solution. The vehicle is now running normally again, with the warning light and countdown cleared.This Citroën Berlingo came in for an Eco Map, alongside EGR and AdBlue software solutions. The Eco Map was applied to improve drivability and fuel efficiency, while the existing emissions-system faults were addressed to help restore smoother, more reliable performance.This Vauxhall Vivaro came in for a speed limiter removal and an Eco Map. The limiter was safely removed, while the Eco Map was applied to improve drivability, throttle response and overall fuel efficiency—ideal for a hardworking commercial vehicle covering plenty of miles.Running board side steps fitted to this Range Rover Velar. Bolted directly to the vehicle’s sills for a strong and secure fit. They look great, add extra practicality and give the Velar even more road presence.