Real Performance Mapping

Broadbridge Heath, West Sussex

ECU Remapping & Performance Upgrades in Horsham

Engine and gearbox tuning, diagnostics and servicing. BMW, MINI and VW Group specialists.

Stage 1 from £260 Pre-tune health check included

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RPM Sussex Workshop

Find the right service for your car

Based in Broadbridge Heath, Horsham. Send us your reg and we’ll confirm what suits your car and what it costs before you book.

  • 4+ years in business
  • Hundreds of cars tuned
  • In-house workshop
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From the RPM Sussex workshop

Recent Work

Servicing, tuning and fitting carried out at our Broadbridge Heath workshop.

Audi S3 service photos showing fluid changes, filters and diagnostic resets

DSG & Haldex Servicing

Audi S3

DQ250 / 0D9 · 6-speed DSG

  • Engine oil and filter changed.
  • DQ250 DSG oil and filter changed.
  • Haldex oil changed, with the pump and gauze cleaned.
  • Catch can drained and intake filter cleaned.
  • Diagnostic scan and service resets completed.
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BMW M4 Competition in the workshop for bench ECU unlocking and remapping

Engine & Gearbox Tuning

BMW M4 Competition

  • ECU unlocked on the bench before mapping.
  • Stage 1 engine remap for stronger power delivery.
  • Gearbox remapped to suit the extra torque.
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Blue BMW M car showing the front bumper removal, grille work and fitted splitter

Exterior Fitting

BMW M Front-End Styling

  • Front bumper removed for access.
  • New front grille and lower grille intakes fitted.
  • Front splitter installed and bumper refitted.
View Body Kit Fitting

Send your reg and what you’d like done for a quote.

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About RPM Sussex

We are RPM Sussex — a Broadbridge Heath workshop built on knowledge, experience and a passion for cars. We work closely with our technical partners to provide tuning solutions and supporting setups matched to your vehicle and what you want to achieve. From more responsive performance to engine and gearbox maintenance, our focus is on helping you enjoy and look after your car.

More Power & Torque

Vehicle-specific ECU and TCU tuning for stronger, smoother performance.

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Sharper Throttle Response

Calibrations selected to improve response and everyday drivability.

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Fuel Economy Tuning

Eco and Blend options selected around your vehicle and driving needs.

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Maintenance & Servicing

Engine and gearbox servicing, including maintenance for supported DSG transmissions.

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Broadbridge Heath workshop · By appointment only

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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Visit RPM Sussex

Car Remapping Across Sussex & Beyond

Based at Lawson Hunt Industrial Estate in Broadbridge Heath, RPM Sussex provides unit-based remapping and workshop services for drivers across Sussex and the surrounding areas.

From ECU and TCU remapping to diagnostics, vehicle coding, body kit fitting, performance upgrades and car or DSG servicing, all work is carried out at our workshop by appointment only. Send us your registration and the work you have in mind to arrange your visit.

  • Horsham
  • Crawley
  • Brighton
  • East Grinstead
  • Worthing
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RPM Sussex logo

By Appointment Only

Broadbridge Heath Workshop

Lawson Hunt Industrial Estate
Broadbridge Heath, West Sussex

Flexible Ways to Pay

Spread the Cost

Payment Assist may allow eligible customers to spread the cost of approved workshop work using an interest-free payment plan, rather than paying the complete balance at once.

  • 3, 4 and 6-month options may be available
  • An initial payment is made when the plan is arranged
  • Remaining payments are collected automatically
  • Available for eligible customers and qualifying work

Illustrative Examples

Three-Payment Examples

These examples show how selected totals could be divided across three payments. Your actual plan and payment schedule will be confirmed during the application.

£260 Total amount Approximately £86.67 per payment
£480 Total amount £160 per payment
£900 Total amount £300 per payment

The final payment may be adjusted slightly where rounding is required.

Ask About Payment Assist How Payment Assist Works

Important information: Credit is subject to eligibility and affordability checks. Applicants must be aged 18 or over and resident in the United Kingdom. Terms and conditions apply. Missing payments may affect your credit file and may result in additional charges.

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Audi A4 Allroad 2.0 TFSI quattro in for a Stage 1 remap! This 2.0 TFSI came in for a little extra performance, with a Stage 1 calibration to improve power delivery, throttle response and overall drivability. Stage 1 Performance: 211 BHP → 260 BHP (+49 BHP) 350 Nm → 400 Nm (+50 Nm) Running a Bosch MED17.1 ECU, tuned using AutoTuner via OBD. Full pre- and post-tuning health checks completed, followed by a road test. Smooth power delivery, no fault codes and everything performing as expected. A great all-rounder, now with a bit more punch when you need it!Mercedes Swirl Flap / Intake Flap Delete This Mercedes came into us with the engine management light (EML) illuminated due to an issue with the intake manifold swirl flap system. A fairly common problem on these engines, where the swirl flap mechanism or actuator can develop faults over time, triggering the EML and potentially affecting engine performance. We carried out the software side of the swirl flap delete, disabling the faulty system within the ECU to prevent the associated fault from returning.Cobra Exhaust Upgrade Full Cobra exhaust system fitted, featuring a back box delete while retaining the original resonator, finished off with carbon fibre tips! Really nice bit of kit, with a much wider and more aggressive look compared to the OEM exhaust, while keeping the resonator to help control the sound. Unfortunately, the supplied rear diffuser was slightly too small to accommodate the new exhaust, so we couldn’t get everything lined up exactly how we wanted. The customer is now having a new carbon fibre diffuser made specifically to suit the exhaust, which should finish the rear end off perfectly!BMW 530d M Sport in for the full works at RPM Sussex! This G30 came in for a Stage 1 ECU remap, ZF 8-speed gearbox tune, major service and brake fluid change. Stage 1 Performance: 265 BHP → 315 BHP (+50 BHP) 620 Nm → 720 Nm (+100 Nm) Alongside the extra power, we tuned the gearbox to improve shift response and make the most of the additional torque. We also carried out a full major service, including fresh Castrol EDGE engine oil, oil and air filters, cabin filter, brake fluid replacement and BMW CBS service resets. A full vehicle health check was completed, with engine oil pressure, fuel pressure and gearbox operation all looking good. We also addressed a swirl-flap fault through the ECU software and carried out a full inspection, highlighting a few areas for future maintenance.BMW X4 M Competition in for Stage 1 ECU & Gearbox tuning! Powered by the 3.0L twin-turbo S58, producing an impressive 510 BHP from the factory. With our Stage 1 calibration, we’ve taken things a step further! 510 BHP → 575 BHP (+65 BHP) 600 Nm → 720 Nm (+120 Nm) Alongside the engine remap, we’ve calibrated the ZF 8-speed gearbox to complement the additional torque, improving shift response, gear changes and overall drivability. We’ve also completed the ECU unlock, allowing future compatible remapping directly through OBD without needing to remove the ECU again. Full pre- and post-tuning health checks completed, with everything performing as expected.Blend remap completed on this 2.2L Land Rover Defender! A very clean, low-mileage example, and a great base for a remap. The 2.2L diesel responds well to tuning, with our Blend calibration offering a nice balance of extra power, improved torque and everyday drivability. A great all-round improvement without going too aggressive! All completed via OBD using our Alientech KESS3.