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Citroën ECU Remapping & Tuning

Citroën tuning is assessed for the exact engine and ECU listed below.

Choose your model to check the information we hold, or send your registration for a tailored quote.

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Citroën C3

Mk3 · 2016-present

Citroën C5 Aircross

Mk1 · 2018-present

Identify your Citroën engine before choosing a tune

The 2 listed model families above cover the records currently in our library, not every Citroën ever produced. Select the generation and factory output matching your car; a shared model badge does not guarantee the same engine, ECU or gearbox.

Stage 1 normally retains standard performance hardware; Stage 2 requires the parts specified for that engine. Some ECUs need unlocking or workshop access at our Slough workshop.

Citroën gearbox considerations

Gearbox suitability is confirmed per vehicle.

Available figures are estimates, not a dyno result for your vehicle. If your engine is missing, send the registration and configuration for assessment rather than applying another variant's numbers.

Compare tuning optionsGearbox supportWorkshop or mobile

Get Your Citroën Remap Quote

Select one or more services and send your enquiry to STX Tuning.

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Call STX: 01753 439130
  • 4.9/5 Google rating · 535 reviews
  • Slough workshop
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Google Customer Reviews

Don't Just Take Our Word For It.

See what customers say about their experience with STX Tuning.

Google Reviews

4.9

535 Google Reviews

  • Jake Bickmore

    Dec 2025

    STX Tuning were absolutely brilliant. The service was super fast — same day turnaround — and they solved an issue with my car that a main dealer claimed would cost me thousands to fix. It turned out the expensive repair wasn’t even necessary, and STX handled it quickly and professionally. Honest, efficient, and highly recommended!

    Posted on Google · view on our Google profile

  • Matthew Mooney

    Nov 2025

    STX were great! (its within ONYX which confused me when I got there, no biggy, just for anyone else reading it). I happened to be arriving when a guy must have been starting their shift, super helpful and got me to the right person. On the way in they even took the time to show my son the Lambo they had, this type of service is so nice to receive. The young guy we spotted fitting the wheels later on, thank you! In for a Stage 1 remap, all done in 30 minutes, and car drives brilliantly and exceeded expectations. Also at a great price as well. All staff I met were super nice and helpful. Credit to you guys! I will definitely be choose these guys going forward! Highly recommend.

    Posted on Google · view on our Google profile

  • Loizos Kyriacou

    Jun 2025

    Went to remap my GLE 250d and the whole process was smooth from start to finish. Super responsive, and had the job done quickly with zero hassle. The results are brilliant , noticeable power gains straight away and smoother drive overall. Would highly recommend them to anyone looking for a quality remap with excellent customer service!

    Posted on Google · view on our Google profile

  • Debby Cunliffe

    Jun 2025

    Fantastic service. Came to my home on a Sunday to remap my car. Great job done and lifetime warranty plus interest free payment facility over 4 months available. Highly recommend

    Posted on Google · view on our Google profile
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