BMW Z4 Series E85 N52 Roadster Cable Alternator Starter Base B+ 7545142

BMW Z4 Series E85 N52 Roadster Cable Alternator Starter Base B+ is an original electrical system component, belonging to the Cables, harnesses and connectors group, designed for use in the engine power supply and starting system. This used OEM component ensures proper conduction of starting and charging current, which translates into stable operation of the electrical system and reliable engine starts.

Specifications and technical data

• SKU: 7545142
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7545142
• Substitutable numbers: 7545142, 12427545142
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the vehicle

The BMW Z4 Series E85 N52 Roadster Cable Alternator Starter Base B+ is responsible for connecting key components of the engine's electrical system – the starter, alternator, and the rest of the power supply installation. A properly selected cable in this section minimizes voltage drops, reduces the risk of connector overheating, and supports stable battery charging.

This component is particularly important in vehicles with the N52 engine, where current loads during starting and alternator operation are high, and the quality of the cables has a direct impact on the reliability of the entire system.

Construction and technical advantages

The cable belongs to the Cables, harnesses and connectors group, which means it was designed as part of the manufacturer's complete electrical installation. The construction includes a properly selected conductor diameter, insulation adapted to engine compartment conditions, and factory-made terminals allowing for correct attachment to the alternator, starter, and other installation points.

• Appropriate cable diameter ensuring safe transmission of starting current.
• Insulation adapted to high temperatures and vibrations in the engine compartment.
• Factory terminals and connectors facilitating installation and maintaining proper electrical contact.
• Cable geometry matched for routing in the BMW Z4 E85 body with the N52 engine.

Benefits of using an original BMW cable

Using an original cable from the Cables, harnesses and connectors BMW group allows you to maintain compliance with the vehicle's factory specifications. Thanks to this:

• the proper battery charging characteristic is maintained,
• the risk of overheating and insulation damage at critical points is limited,
• connectors operate within the parameters specified by the manufacturer,
• the electrical installation remains consistent with BMW service documentation.

This solution is particularly beneficial when servicing vehicles used intensively or after electrical modifications, where power stability is of great importance for the operation of controllers and accessories.

Condition and service application

The offered component is used, which allows for an economical replacement of a damaged or corroded cable while maintaining original BMW specifications. This type of cable will work well both for typical starter system repairs and for diagnosing charging problems, where it is necessary to eliminate damaged sections of the installation.

Replacing the alternator and starter cable is recommended in situations where there are starting difficulties, voltage drops under load, or visible mechanical and thermal damage to the insulation.

Expanding the scope of repairs and auxiliary materials

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as additional power cables, ground harnesses, or service connectors, check out the available parts in the BMW Cables, harnesses and connectors category.

When planning broader service work, especially before the low-temperature season, it is worth checking out practical tips regarding the inspection of the electrical system and other components – the article Winter essentials: which used car parts are worth checking and replacing before the frost?, containing checklists and a discussion of key maintenance elements, may be helpful.