Lost your keys? Don't panic – call 07305 010508 · open 9am – 9pm, 7 days · 24/7 emergencies subject to availability
AutoECU
Citroën logo
Stellantis · keys, coding & repairs

Citroën car keys, coding & electronics

Sofa-soft suspension, quirky style and a BSI that likes to keep you guessing

About Citroën

Citroën has always marched to its own beat: cloud-comfy rides, clever family cars like the C4 Picasso and Berlingo, and designs that look like nothing else in the car park. Under the quirky skin it's the same PSA electronics as Peugeot, so a moody BSI, an AdBlue warning or a 'key not detected' message are all part of the charm.

AutoECU looks after Citroën keys, BSI and ECU repairs, coding and diagnostics, from C1s and C3s to Dispatch and Relay vans.

Citroën models & platform codes

UK-market models we commonly work on, with years and the manufacturer's platform / chassis codes. Can't see yours? Ask us, the list isn't exhaustive.

ModelYearsCode
C3 / e-C32024+CC21
C32016-2024B618 (SX)
C32009-2016A51 (SC)
C32002-2009FC
C3 Aircross2024+Mk2 (Smart Car platform)
C3 Aircross2017-2024A88
C4 / e-C4 / C4 X2020+C41 (C4 X: C43)
C42010-2018B7
C42004-2010LC
C4 Cactus2014-2020E3
C5 Aircross2025+Mk2 (STLA Medium)
C5 Aircross2018-2025C84
C5 X2022+E43
C52008-2017X7
C52001-2008Mk1 (DC/DE)
C4 Picasso / Grand C4 Picasso / SpaceTourer2013-2022B78
C4 Picasso / Grand C4 Picasso2006-2013B58
Xsara Picasso1999-2010N68
C12014-2022Mk2
C12005-2014B0
C22003-2009Mk1
DS3 (Citroën-badged)2010-2015A55
DS4 (Citroën-badged)2011-2015B75
DS5 (Citroën-badged)2012-2015B81
Berlingo2018+K9
Berlingo2008-2018B9
Dispatch / SpaceTourer2016+K0
Dispatch2007-2016G9
Relay2006+X250 / X290

Popular Citroën coding

  • Daytime running lights, auto-lock and mirror fold-on-lock settings
  • Apple CarPlay / Android Auto activation on supported NAC and SMEG+ screens
  • Reversing camera and rear parking sensor retrofits
  • Towbar electrics coding on C5 Aircross, Berlingo and Dispatch
  • Cornering lights and follow-me-home lighting
  • BSI, ECU and screen replacement coding
  • Seatbelt chime and comfort setting tweaks

Common Citroën electronic repairs

  • BSI faults: central locking, wipers or lights with a mind of their own, water ingress
  • Engine ECU repair and cloning for no-start and no-communication faults
  • AdBlue / SCR faults and 'starting impossible' countdown warnings
  • Electric parking brake faults on C4 Picasso and Grand C4 Picasso
  • Instrument cluster and digital dash faults on C4 Picasso and C3
  • Hands-free keyless entry and 'key not detected' problems
  • Steering column switch module (COM2000) faults on C2, C3 and Xsara Picasso

Citroën keys & fobs

Transponder key with remote (fixed or flip)

C3 FC, C2, Xsara Picasso, C5 Mk1, Berlingo (early)

Adding keys usually needs the car's 4-digit PIN, which we can normally retrieve.

Remote flip key (HU83 blade)

C3 A51, C4 B7, C4 Picasso B58/B78, DS3, Berlingo B9, Relay

Very common; worn flip mechanisms and buttons can often be repaired.

Hands-free proximity key

C4 Picasso B78, C5 Aircross, C4 C41, C5 X

Keyless entry and start, with an emergency blade inside the fob.

Smart key (latest generation)

C3 CC21, C3 Aircross Mk2, C5 Aircross Mk2, Berlingo K9

Newer cars with secure gateways need dealer-level tools, which we have.

Toyota-built remote key

C1

Same system as the Toyota Aygo and Peugeot 107/108, programmed differently to other Citroëns.

Citroën questions

Can I get a spare Citroën key without going to the dealer?

Yes. Spare and replacement keys for most Citroëns can be cut and programmed on the spot, including all-keys-lost jobs. Contact AutoECU and we'll come to you.

Why is my Citroën showing random warning lights and electrical faults?

On many Citroëns the BSI (body control unit) is the culprit, often thanks to water ingress or a failing connection. AutoECU can diagnose it properly and repair, replace or recode the BSI.

My C4 Picasso's electric handbrake won't release, can you help?

Often it's the parking brake module or motor rather than the brakes themselves. AutoECU can read the fault codes, test the system and get you moving again.

Need something done on your Citroën?

We'll fill in the make for you. Just add your reg and what's wrong.

Get my Citroën quote
WhatsApp us Call 07305 010508