C103FWheel-speed sensor rear-left: circuit fault

• Renault/Dacia code · ABS / stability control
• Lights a warning lamp

How the car detects it

The ABS unit sees an electrical fault in the rear-left wheel-speed sensor circuit. This meaning comes from Renault's tables for its older Bosch ABS/ESP 8.0 units; newer ABS units (for example on Logan II and Clio IV) report wheel faults under other codes. While the fault is present, ABS (and ESP, if fitted) is usually switched off; normal braking still works.

What you may notice

• ABS (and ESP) warning light
• ABS does not work

Likely causes

• PossibleDamaged sensor wire or connector (chafing, corrosion)
• PossibleFailed sensor
• RareABS unit fault

Sources

• autodiag-france.com › la-liste-complete-des-codes-defaut-renault-co…
• autoxuga.com › renaultdtc503F.html

Backed by at least two independent sources.

From Obdaryn's Renault/Dacia pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.