Porsche Cayman Boxster 718 982 981 Fuse Relay Box 99161010300

Porsche Cayman Boxster 718 982 981 Fuse Relay Box is an original electrical system component from Porsche, designed for professional management of circuits and protection in 718, 982, and 981 series vehicles. This used fuse box from this model group allows for the preservation of the factory electrical architecture, which facilitates diagnostics, service, and subsequent repairs. It is a practical solution for workshops and users who want to restore full functionality to the electrical system without interfering with the manufacturer's original design.

Specifications and technical data

• SKU: 99161010300
• Mark: Porsche
• Condition: Used
• OEM Part Number: 99161010300
• Substitutable numbers: 99161010300, 991 610 103 00
• Part type: Fuse Box
• Category: Fuses & Fuse Boxes

Purpose and role in the Porsche electrical system

The fuse box in Porsche Cayman and Boxster models is responsible for the logical arrangement and protection of circuits powering key vehicle systems – from the powertrain and comfort systems to active safety components. Using an original component from the 718 / 982 / 981 series ensures:

• preservation of factory circuit division and protection points,
• proper cooperation with the electrical harness and control modules,
• easier identification of circuits during service diagnostics.

As a result, the electrical system remains consistent with Porsche service documentation, which reduces the risk of installation errors and speeds up workshop tasks.

Construction and compatibility with 718 / 982 / 981 models

The discussed fuse box has been designed specifically for the electrical architecture of the Cayman and Boxster series, which translates into a precise fit for factory mounts and connectors. The original construction guarantees the correct placement of fuse and relay sockets, as well as proper routing of current paths inside the module.

In practice, this means:

• no need for modifications to harnesses or connectors,
• preservation of factory mounting points in the vehicle compartment,
• the ability to use existing Porsche electrical diagrams during installation and diagnostics.

For workshops specializing in the Porsche brand, this is a significant advantage, as it shortens installation time and minimizes the risk of compatibility issues.

Benefits of using an original Porsche fuse box

Using an original fuse box in Cayman and Boxster models brings a number of practical operational benefits. The key ones are:

• Stable electrical system operation – proper circuit routing and appropriately selected path cross-sections limit voltage drops and overheating of connections.
• Trouble-free diagnostics – compliance with factory diagrams makes it easier to locate faults and check individual circuits.
• Consistency with other OEM components – the box works with original control modules, relays, and harnesses, which reduces the risk of incorrect readings or system errors.

For Porsche sports car owners, it is also important that maintaining the original electrical architecture helps preserve the vehicle's value and facilitates future modifications or equipment upgrades based on factory solutions.

Condition, origin, and service application

The presented fuse box is a used item, sourced from a dismantled Porsche vehicle. This type of component is particularly valued in professional service centers because it allows for the use of an original solution instead of a damaged module without having to resort to replacements with uncertain specifications. In practice, this is often the most rational choice for premium car repairs, where compliance with the factory design is paramount.

Before installation, it is recommended to perform a standard verification of the condition of contacts, sockets, and connectors for any signs of overheating or corrosion, in accordance with service procedures used in Porsche vehicles.

Porsche fuses and fuse boxes – expansion and service

If you are planning a comprehensive repair or upgrade of the electrical system area in your Porsche and need other elements from the same group, such as additional boxes, distribution modules, or protection housings, check the available parts in the Porsche fuses and fuse boxes category.

To better understand why original used electrical components for premium cars are becoming an increasingly popular choice among informed drivers and workshops, it is worth reading the market analysis in the article Crisis in the new parts market? Why in 2026 used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend. This will allow you to make more informed decisions when planning repairs and upgrades for your Porsche.