Audi VW Volkswagen Seat Relay Unit 16 Pins number 389 12V UH2 4B0955531C

Audi VW Volkswagen Seat Relay Unit 16 Pins number 389 12V UH2 is a component from the Relays category, designed to control the operation of windshield wipers in VAG group vehicles. Thanks to its precise construction and compatibility with the electrical system, it ensures stable, repeatable operation of the wiper system and improves driving comfort in difficult weather conditions.

Specifications and technical data

• SKU: 4B0955531C
• Mark: Audi
• Condition: Used
• OEM Part Number: 4B0955531C
• Substitutable numbers: 4B0955531C, 4B0 955 531 C
• Part type: Relay
• Category: Relays

Purpose and function of the wiper relay

The presented relay is responsible for controlling the wiper operation cycle, including switching on, switching off, and executing intermittent modes. Using a dedicated relay in the electrical system allows for offloading the switches in the cabin and ensures repeatable operating times, which translates into a clear field of view for the driver and safer driving in the rain.

A relay-based solution is particularly important in vehicles where the wiper system works with additional functions, such as different speeds or intermittent modes. A properly selected component minimizes the risk of wiper malfunction, flickering, or accidental interruptions in operation.

Connector construction and system integration

The relay is equipped with a multi-pin connector, which enables the operation of several control circuits in one compact module. This design facilitates integration with the vehicle's factory wiring harness and allows for maintaining the original logic of the wiper system.

The multi-pin connector also promotes the stability of electrical connections, reducing the risk of contact overheating and voltage drops. As a result, the wiper control system operates in a predictable manner, and the response to changing the position of the steering column lever is fast and repeatable.

Benefits of using an original relay

Using a relay from the same manufacturer group as the vehicle ensures high electrical and mechanical compatibility with the factory installation. This means proper matching of operating parameters, such as current capacity or timing characteristics, without the need for modifying the wiring or additional system adjustments.

The main advantages of such a solution include:

• maintaining the original functionality of the wiper system, including intermittent modes,
• stable operation under typical vehicle operating conditions,
• easier diagnostics of potential electrical faults,
• possibility of direct replacement for a worn-out component.

Component condition and installation aspects

The offered relay comes from disassembly and is classified as used, which allows for an economical repair of the wiper system while maintaining the original manufacturer's specifications. This type of part is particularly attractive for older vehicles, where the priority is to maintain system efficiency at reasonable service costs.

Installing the relay usually involves seating it in the appropriate socket in the fuse box or relay module. In most cases, this is a plug-and-play operation that does not require interference with the electrical wiring, provided the component is correctly matched to the specific vehicle version.

Matching by numbers and selection support

To ensure full compatibility with a specific car model, it is worth verifying the relay's compliance with the part number used in the vehicle and the list of interchangeable numbers. This helps avoid installation problems and guarantees proper cooperation with the existing electrical system.

If you want to check step-by-step how to properly select a part based on manufacturer markings and vehicle data, the following article will be helpful: Guide: how to select the right car part by VIN and OEM number. You will find practical tips on verifying parameters and a list of questions worth asking the seller before purchasing a used component.

If you are planning a comprehensive repair or upgrade of the electrical system area responsible for wiper control in your Audi and need other components from the same group, such as control modules, additional relays, or components working with the wiper system, check the available parts in the Audi Relays category.