2005 BMW Z4 Alternators

The Bosch Premium Alternator, remanufactured to deliver 120 amps at 12 VDC, is engineered for peak performance and reliability. Full-load tested to meet Bosch’s rigorous performance standards, this alternator ensures dependable operation under demanding conditions. Unlike rebuilt units, it is 100% factory tested and remanufactured using high-quality materials and advanced technology, offering superior durability and longevity. Designed with a clockwise rotation direction, it seamlessly integrates into your vehicle’s electrical system, providing consistent power for essential components. Whether you’re replacing a worn-out alternator or upgrading for enhanced reliability, this premium unit delivers exceptional value and performance you can trust.

Product Features:

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Product Features:

• Full-load tested to guarantee compliance with Bosch’s strict performance specifications
• 100% factory tested, units are remanufactured (not rebuilt)
• Built to last – uses high quality materials and the most technologically advanced developments.
• Engineered for seamless integration into your vehicle’s electrical system, ensuring consistent and reliable power delivery to essential components.
• Designed with a clockwise rotation direction for optimal compatibility and smooth operation in demanding conditions.

The Bosch Premium Alternator delivers exceptional performance and reliability, making it a top choice for demanding automotive needs. Engineered with 100% new components, it is built to endure the harshest environments, ensuring optimal functionality and an extended lifespan. Designed to handle excessive heat and high electrical demands, this alternator is perfect for modern vehicles with advanced electrical systems. With a robust 120-amp output and 12 VDC voltage, it provides consistent power to keep your vehicle running smoothly. All mounting points are precisely gauged, resized, or rethreaded for a perfect fit, ensuring hassle-free installation. Additionally, the clockwise rotation direction ensures compatibility with a wide range of vehicles. As a bonus, every purchase includes free 24-hour Roadside Assistance Protection, adding extra value and peace of mind. Choose Bosch for a premium alternator that combines durability, performance, and unmatched reliability.

Product Features:

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Product Features:

• 100% new components withstand the harshest environments for the best performance and longest life
• Built specifically to withstand excessive heat and high electrical demands.
• All mounting points 100% gauged and resized or rethreaded for proper fit
• Free 24-hour Roadside Assistance Protection with purchase of any Bosch Alternator
• Designed to deliver consistent 120-amp output, ensuring reliable power supply for modern vehicles with advanced electrical systems.

This 120-amp alternator from WAI is a premium choice for reliable and efficient power delivery. Engineered to meet or exceed OEM specifications, it ensures a perfect fit and hassle-free installation, making it an ideal replacement for your vehicle. The advanced voltage regulator protection safeguards against transient voltage spikes, preventing potential battery damage while maintaining low heat dissipation. Its high-power rectifier assembly, featuring open junction press-fit diodes, is designed to keep the unit running cool even under demanding conditions. Fully compliant with ECU communication, this alternator guarantees seamless integration with your vehicle’s electrical system. Each unit comes with a printed copy of test results, providing transparency and confidence in its performance from the very first use. Built for durability and efficiency, this alternator delivers exceptional value and peace of mind for your automotive needs.

Product Features:

• Engineered to meet or exceed OEM specifications for a perfect fit and hassle-free installation.
• Voltage regulator protection – load dump protected against transient voltage spikes avoiding potential battery damage. Low saturation voltage results in lower heat dissipation. Fully compliant in communication with ECU.
• High power rectifier assembly is designed with higher power open junction press fit diodes to keep the units running cool.
• Each unit includes a printed copy of the test results so you know exactly what to expect from our parts right from the first time they power on.
• Built for durability and efficiency, this alternator ensures reliable performance under demanding conditions, delivering exceptional value and peace of mind for your automotive needs.

The Valeo premium alternator delivers exceptional performance and reliability, making it a top choice for automotive electrical systems. Designed with 100% new components and core, this alternator eliminates the risk of premature failure, ensuring superior durability compared to remanufactured units. Featuring premium rare earth magnets, it achieves higher output without increasing size, enhancing efficiency and fuel economy. With an amperage rating of 120A and a 12VDC voltage, this alternator is tailored for exact fitment and application-specific needs, backed by rigorous testing under extreme conditions for up to six months. Its high resistance to heat, vibration, and contaminants ensures consistent charge output even in the harshest environments. As the original equipment part now available in the aftermarket, Valeo’s alternator combines innovation and reliability, making it a smart investment for maintaining peak vehicle performance.

Product Features:

• Valeo premium alternators are 100% new products (not remanufactured)
• 100% new components and core eliminates premature failure for increased durability over remanufactured units
• All parts are application specific for an exact fit
• Premium rare earth magnets increase the output of the alternator without increasing the size for better efficiency
• All applications go under extreme condition testing up to 6 months to ensure reliability under the harshest conditions and electrical demands
• High resistance to heat, vibration, and contaminating particles helps maintain maximum charge output
• Part Number 439398 is the original equipment part now available in the aftermarket.