Part description

This control unit/module BSG RQ-U03-00 Delphi is for functions related to trailer connection in Citroën and Peugeot cars. It is a used car part suitable for repairing the electrical installation and restoring the correct function of the towing device (depending on the car’s equipment). The key to finding the right part is to follow the product number listed below.

Technical information

• Manufacturer: Delphi
• Model: not specified
• Other numbers: 1688059480

Product codes

• Product codes: 9810050080

Installation recommendations

• Before installation, compare the designation and part numbers (9810050080, 1688059480) with the original module in the car.
• Installation in a dry and clean environment is recommended, with an emphasis on the correct seating of the connectors and their securing.
• After the replacement, check the function of the trailer connection (lights/communication depending on equipment).

Reasons why the part is damaged

• Moisture and corrosion in the place where the module is stored or in the connectors.
• Damage to the wiring to the towing device (abrasion, pinching, unprofessional interventions).
• Short circuit or overvoltage in the electrical installation of the trailer (e.g. defective socket, damaged harness).
• Mechanical damage to the unit or connectors during disassembly/assembly or after an accident.

• Manufacturer: Siemens
• Model: BSC A01-00
• Product codes: 9655471880, 9688EL, S120017004G
• Other numbers: 9655471880 9688EL

BSC A01 00 from Siemens is a control unit that is in the category of electrical components. It is specially designed for highly demanding operating conditions and is able to guarantee the efficient operation of the car. This unit ensures proper communication between the vehicle’s various electrical systems, which is essential for its trouble-free operation. Installation of this part is standard and does not require special tools, however we recommend professional installation to ensure proper and safe operation of your vehicle. If you are an experienced auto mechanic or knowledgeable about auto repair, installation should not be a problem for you. Buy with confidence! The part offered has been carefully tested and is regularly inspected to meet our high quality standards. Also, remember that since these are used parts, they may show slight signs of wear, but this does not affect their functionality. With this control unit, you can be sure that your Citroën or Peugeot vehicle will work like new again. Don’t wait and take the necessary steps to restore your car’s performance today!

Original control unit/electronic module Siemens VDO BSC A01-00 for PSA cars (Citroën/Peugeot). This is a used, fully functional disassembled part – an ideal replacement for the original non-functional unit. Thanks to the exact OE numbers, you can easily verify compliance and avoid unnecessary returns.

Key benefits
– Original Siemens VDO PSA part – reliability and long service life
– Accurate identification by OE/catalog numbers
– An advantageous alternative to a new part, without the need to compromise on quality

OE and serial numbers to search
– PSA OE: 9656147980
– Alternative PSA code: 9688EL
– Siemens VDO: BSC A01-00
– Production designation Siemens VDO: S120017004H, S120017004I
Note: If your original part bears any of the above numbers, there is a high probability of compatibility.

PSA vehicle compatibility
– Citroën: C4, C5 II, C8, Jumpy II
– Peugeot: 307, 308, 407, 807, Expert II
For selected years and engines. Always verify compatibility by the OE number on your original unit, or by the VIN in diagnostics (Diagbox/ServiceBox).

Technical information
– Type: electronic control module (Siemens VDO BSC A01-00)
– Manufacturer: Siemens VDO
– Group of parts: electrical components – control units
– Condition: used original part from disassembly
– Packaging: 1x control unit

Assembly and coding
– In some cases, coding/pairing with the vehicle (immobilizer, configuration data) may be required. We recommend that assembly and any programming be carried out by an expert with PSA software support (Diagbox).
– Before assembly, compare the numbers on the unit nameplate and visually inspect the connectors and harnesses.

How to verify part compliance
– Fastest by comparing OE/PSA numbers (9656147980, 9688EL) and production codes (S120017004H/I, BSC A01-00) to your original unit.
– In case of uncertainty, send us the VIN – we will be happy to verify compatibility.

This product will help resolve issues such as broken electronic circuits, unit error messages, or powered circuit failures if they are caused by a defect in the original module. By choosing a genuine used part, you get the right specification for PSA Citroen/Peugeot cars while maintaining a favorable price.

Used trailer control unit BSC B04-00 engineered to restore trailer connection functions on compatible Citroën and Peugeot models. Suitable for professional workshops and experienced DIY mechanics, this unit manages trailer detection, lighting outputs and CAN-bus communication with the vehicle body systems to ensure safe towing and correct signalling. Commonly searched by product codes such as 9678751080, S180085005A and 9688EL.

Technical Information

• Manufacturer: Siemens VDO / Continental
• Model: BSC B04-00
• Product Codes: 9678751080; S180085005A; 9688EL
• Other Numbers: B03-00; B04-00
• Compatible Models: Citroën Berlingo III; Citroën C4 Picasso; Peugeot 3008 I; Peugeot 5008 I; Peugeot Partner III

Installation And Coding – Important

• The unit is used and is “paired” with the original vehicle (VIN/PIN/keys).
• Options for commissioning:
  1. Cloning data from the old unit (EEPROM/Flash) – after cloning the unit is plug and play.
  2. Virginization and subsequent initialization/telecoding via DiagBox (or online) + key adaptation.
• Recommended to be performed by a specialist with PSA service equipment (DiagBox/Lexia/PP2000).
• Before removal/installation always disconnect the battery and follow the manufacturer’s procedure to avoid damaging the unit.

Installation Recommendations

Access to the BSC unit typically requires removal of interior trim or protective covers. General safe replacement steps:

• Disconnect the negative battery terminal before any work to prevent short circuits and unit damage.
• Locate and remove the covering panels to access the unit (refer to the vehicle repair manual for exact location and removal sequence).
• Label and carefully unplug connectors. Inspect pins and connectors for corrosion or bending.
• Remove fasteners, extract the old unit and fit the replacement in the original orientation. Reconnect connectors securely and reinstall fasteners.
• Complete commissioning by cloning or telecoding as required (see Installation And Coding – Important).

Why The Part Most Commonly Fails

• Water ingress and corrosion from damaged seals or exposed wiring, especially on vehicles used for towing in wet conditions.
• Electrical faults caused by short circuits or incorrect trailer wiring (overloads can damage outputs).
• Connector damage and pin corrosion from vibration or improper mating during trailer connection.
• Software or configuration faults after battery replacement or module replacement that require cloning or reinitialization.

Fitment And Practical Notes

When searching for the correct unit, use the product codes listed above. The unit is intended for the listed Citroën and Peugeot models but compatibility depends on the vehicle’s original configuration and the installed body electronics options. Installation and coding steps are critical to restore full functionality of trailer detection and lighting. For reliable results, cloning or proper telecoding with PSA diagnostic tools is recommended.

Keywords

BSC B04-00, Trailer Control Unit, Citroën Trailer Module, Peugeot Trailer Module, 9678751080, S180085005A, 9688EL, Siemens VDO, Continental.

Looking for a reliable and efficient way to repair or enhance the performance of your Citroën or Peugeot vehicle? The BSC A02-00 Siemens VDO Control Module is an excellent choice for professional mechanics and DIY enthusiasts aiming to maintain their vehicle in optimal condition without incurring excessive costs on spare parts.

This module originates from the Peugeot 407, ensuring precise compatibility and operation for this model. It plays a crucial role within the vehicle’s electronic system, managing key electrical components to guarantee smooth functionality.

Installation and Maintenance

Replacing this control module is a straightforward process for experienced mechanics or automotive hobbyists with basic technical skills. With the right tools and procedural care, installation can be completed without professional assistance, saving both time and money.

Technical Information

Manufacturer: Siemens VDO
Model: Peugeot 407
Product Codes: 9655471980, S120017003H
Additional Numbers: BSC A02-00

Regular quality inspections ensure that our inventory maintains a high standard of reliability and performance. Purchasing this module guarantees obtaining a part that meets your expectations and helps keep your Citroën or Peugeot vehicle fully operational.

High-quality replacement control unit for Citroën and Peugeot vehicles, referenced under common part numbers used by workshops and DIY mechanics. This BSC B03-00 unit (Siemens VDO / Continental) is often searched by its reference codes, making it easy to find for direct swaps. Ideal for technicians and experienced hobbyists who need a reliable body/control module compatible with multiple PSA models.

Applications

Common Fitment (examples): Citroën C4 Picasso, Citroën C5 X7, Peugeot 207, Peugeot 307, Peugeot 308. Always match the product codes below with the unit removed from the vehicle before installation.

Technical Information

• Manufacturer: Siemens VDO / Continental
• Model: BSC B03-00
• Product Codes: 9665778480, S180085003E, S180085003F
• Additional Numbers: 9688EL, B03-00

Function and Description

The BSC B03-00 is a vehicle control unit that manages and monitors a range of body electronics and communications on the CAN network. It processes sensor inputs and drives outputs to actuators and other modules, ensuring coordinated operation of dependent systems. Proper function is essential for stable vehicle electronics and fault-free communication between modules.

Installation Recommendations

Follow these general instructions to replace the unit safely and correctly:

• Disconnect the battery before starting work to avoid damage to the unit and vehicle electronics.
• Access the unit by removing the required interior or engine-bay trim panels—keep track of fasteners and clips.
• Carefully unplug connectors using the proper release tabs; avoid pulling on wiring harnesses.
• Remove mounting screws and extract the old unit. Compare labels and connector layouts to ensure correct replacement.
• Fit the replacement unit in the same orientation, secure mounting points, and reconnect all plugs firmly.
• Reconnect the battery and clear stored faults. Perform a full system check with a diagnostic tool and verify proper operation of associated functions.
• Note: The unit may require adaptation/programming or parameterisation with PSA diagnostic equipment (DiagBox/Lexia/PP2000) to restore full functionality and to synchronise settings with the vehicle.
• Handle the unit as an electronic component: avoid electrostatic discharge, contamination, and impact.

Why The Part Fails Most Often

• Moisture Ingress And Corrosion: Water entry or condensation on connectors causes intermittent faults or permanent failure.
• Electrical Disturbances: Voltage spikes, poor ground connections, or jump-start incidents can damage electronic components.
• Thermal Stress And Ageing: Long-term heat cycles and aging of electronic components reduce reliability over years of service.
• Physical Damage: Impact from accidents or improper handling during repairs can break connections or housings.

Maintenance And Practical Notes

There is no fixed mileage for failure—degradation depends on vehicle use, environment, and maintenance history. Units on older cars or vehicles exposed to moisture and road salt are more likely to show faults. When replacing, always verify part numbers on the unit itself and clear stored fault codes after installation. If unusual behaviour persists, perform a full electrical inspection of battery, alternator, fuses, and grounding points before attributing faults to the control unit.

Are you looking for a high-quality and reliable car part for your Citroën or Peugeot? We offer the original Siemens VDO BSC A02-00 control unit, carefully removed from a Peugeot 407. This part is perfect for professional mechanics and DIY enthusiasts seeking both functionality and availability in one solution.

The control unit is a crucial component of the vehicle’s electronic system, responsible for managing various electrical parts effectively. It is designed to ensure optimal performance and efficiency for your car. By using this unit, you can expect to restore the original vehicle functions and improve overall reliability.

Technical Information:

Manufacturer: Siemens VDO
Model: Citroën, Peugeot (specifically removed from Peugeot 407)
Product Codes: 9656148080, S120017003I, 6580S9, 6580XF
Additional Numbers: 9656148080
These details guarantee you receive the exact part needed for your vehicle.

If you are interested in this product, we recommend purchasing promptly as it is a frequently searched part with limited availability. This unit is ideal for restoring your vehicle’s original electronic functionality without the need to invest in new and often expensive components. Enhancing the efficiency of your Citroën or Peugeot car is now just a few clicks away.

Please ensure compatibility with your specific vehicle model before purchase. Achieving optimal performance and customer satisfaction is our top priority.

This control unit supports easy installation thanks to standard connectors and pre-configured software settings, ensuring maximum efficiency and seamless integration with your car’s existing electronic systems. Replacing your vehicle’s ECU can restore optimal system functionality, enhance responsiveness, and reduce the risk of electronic failures during operation.

Technical Information:

Manufacturer: Siemens VDO
Model: BSC A04-00, for Citroën and Peugeot vehicles, specifically from Peugeot 407
Product Codes: 9656148180, S120017001H, 6580S9, 6580XF
These codes guarantee precise identification and compatibility with your car.

Carefully tested and inspected, this used control unit offers reliable performance and longevity comparable to original spare parts. Maintaining your vehicle’s electronic system with quality components like this unit is essential for safe and comfortable driving.

Ideal for professional mechanics and DIY enthusiasts alike, this controlled and well-maintained control module provides an effective and cost-efficient alternative to purchasing new, often expensive parts. Enhance your vehicle’s electrical system performance with this dependable control unit designed for Citroën and Peugeot cars.