Description
Electronic Parking Brake Switch For Citroën C4 Picasso Up To 2013, DS4 And Peugeot 3008, 5008. New Part – Aftermarket.
Product Overview
This electronic parking brake (EPB) switch is designed as a direct replacement for Citroën and Peugeot vehicles equipped with an electronic handbrake system. Ideal for professional workshops and experienced DIY mechanics, the unit restores reliable control of the EPB actuator and dashboard indications. Commonly searched by part numbers 9666405677 and 470706 (alternative reference 470703), this aftermarket new switch fits first-generation 3008/5008 and compatible Citroën models.
Key Benefits
- Direct Fit Replacement: Designed to match original mounting and connector layout for straightforward installation.
- Restores Normal EPB Functionality: Resolves faults caused by worn or damaged switch contacts and improves driver confidence in parking brake operation.
- Suitable For Workshops And Skilled DIYers: Clear installation steps and diagnostic considerations included.
How It Works And When It Fails
The switch sends commands to the vehicle’s EPB module to engage or release the parking brake and provides the driver with status feedback via the dash indicator. Failures are typically electrical (worn internal contacts, broken microswitches, damaged wiring or connectors) or due to contamination (moisture, spilled liquids, corrosion). Mechanical damage from impact or excessive force can also render the switch inoperative. Depending on use and environment, failures most commonly appear after several years or high mileage.
Replacement Procedure (Overview)
Basic steps for replacing the EPB switch. These instructions are for experienced technicians; follow manufacturer procedures and safety rules for your specific model.
- Park the vehicle on a level surface and ensure the EPB is in a safe state (disengaged if required by the workshop procedure).
- Disconnect the vehicle battery before starting work to avoid short circuits and prevent unwanted electrical events.
- Remove the necessary centre console trim or bezel panels to access the EPB switch—typically held by clips or screws.
- Unplug the electrical connector and release any retaining clips or screws holding the switch in place.
- Install the new switch, reconnect the connector, reassemble trims, and reconnect the battery.
- Verify function: Operate the EPB and confirm correct engagement/release and dash indicator behavior. If the vehicle reports persistent faults, perform diagnostic clearing and calibration as required.
Installation Recommendations
- Always disconnect the negative battery terminal before removing or installing any electrical component.
- Inspect connector pins and wiring for corrosion or damage; repair any compromised wiring to prevent repeat failures.
- If the vehicle displays EPB fault codes or improper behavior after fitment, use a diagnostic tool capable of Peugeot/Citroën protocols to clear faults and, if necessary, perform EPB initialization or calibration.
- Avoid spraying cleaning fluids or water near the switch during reassembly to prevent future ingress.
Most Common Reasons For Failure
- Electrical Wear: Repeated use causes contact wear inside the switch.
- Moisture Ingress: Water or spilled liquids lead to corrosion and short circuits.
- Physical Damage: Broken plastic tabs, impact damage to the console area, or rough handling during removal/installation.
- Connector Issues: Loose or corroded connectors result in intermittent operation or total loss of function.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4 Picasso (up to 2013), DS4, Peugeot 3008 I, Peugeot 5008 I
- Product Codes: 9666405677, 470706
- Other Numbers: 470703 (alternative reference)
Notes For Professionals
This part is supplied as a new aftermarket unit. After installation, confirm full EPB operation and absence of stored fault codes. If calibration or initialization of the EPB system is required, use PSA-compatible diagnostic equipment for safe and correct commissioning.
