Porsche 987C Alarm Anti Theft System Control Module Unit 99761821001

The Porsche 987C Anti-theft Alarm Control Module is a specialized component from the Electronic Control Modules and Controllers group, designed for vehicle security system operation. This used part allows for an economical yet professional repair of the alarm system, maintaining the factory logic and communication with the vehicle's other electronics.

Specifications and technical data

• SKU: 99761821001
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: 99761821001
• Substitutable numbers: 99761821001, 997 618 210 01, 04215076, 4M5464A1A-60, 4M5464A1A, 4M5 464 A1A
• Location on the vehicle: Rear
• Category: ECUs & Computer Modules

Function and Role of the Alarm Module

The presented anti-theft alarm control module is responsible for managing key vehicle security functions, such as processing sensor signals, controlling the siren, and interacting with the central locking system and other electronic components. As an item in the Electronic Control Modules and Controllers category, it operates within the vehicle's network, communicating with other controllers via data buses, which requires maintaining appropriate hardware and software compatibility.

The module's placement in the rear of the car helps protect it from mechanical damage and external conditions, while also facilitating the routing of wiring harnesses to other elements of the alarm system.

Purpose, Installation, and Integration

The module is intended for use in vehicles where this type of alarm controller is factory-fitted. By retaining the original internal architecture, it enables:

• consistent operation with the vehicle's existing electrical system,
• proper cooperation with sensors and the alarm siren,
• integration with the central locking system and other comfort controllers.

Its location at the rear of the vehicle's body (rear) should be considered during installation planning and wiring routing – this can reduce work time and minimize upholstery interference. When replacing, it is recommended to consult the vehicle manufacturer's service documentation and verify compatibility by OEM numbers and interchangeable part numbers.

Benefits of Choosing a Used Electronic Module

Choosing a used alarm controller is a sensible solution for users who want to restore full functionality to their security system at a controlled cost. A properly selected module:

• allows for the preservation of the anti-theft system's factory operating logic,
• reduces the risk of communication problems within the vehicle's network,
• enables faster repairs compared to time-consuming regeneration of damaged electronics.

To maximize the potential of used electronics, it is advisable to consult the guide on selecting and installing controllers, available in the article on the advantages of using used ECU modules and sensors in modern cars. There you will find practical tips on hardware and software compatibility, as well as answers to frequently asked questions.

Selection by Numbers and Compatibility Verification

When purchasing this type of component, matching by OEM part number and interchangeable part numbers is crucial, along with considering the vehicle's make and equipment version. Proper identification helps avoid communication problems within the vehicle's network, errors in the comfort system, or incorrect alarm operation.

For users who want additional protection against errors when purchasing online, the guide on how to safely verify part compatibility by OEM numbers when shopping online will be helpful. The article describes proven methods for comparing markings and provides practical examples of selecting components for premium brand cars.

Summary and Practical Application

The Porsche 987C Anti-theft Alarm Control Module is a used, fully specialized component for vehicle security system operation, mounted at the rear of the body. As a component from the Electronic Control Modules and Controllers group, it ensures consistent operation with the vehicle's other electronics, provided it is correctly selected by part numbers and compatible with the specific vehicle configuration.

To view other controllers and modules available in our assortment, use the link to the category: check more products from the Electronic Control Modules and Controllers group.