

OEM No.
Mercedes-Benz: 0071542802, 0091540802, A0071542802, A0091540802
Bosch: 0120689503, 0120689508, 0120689515
0120689520, 0120689526, 0120689532
0120689533, 0120689578, 0120689591
0986031600, 0986031601, 0986033520
Engineered to meet the demanding electrical needs of commercial vehicles, the 24V 120A 0120689520 Bosch car alternator for MERCEDES BUS O405 1979-1987 is a reliable replacement and upgrade solution for MERCEDES BUS O405 models produced between 1979 and 1987. As a product from Bosch, a leader in automotive technology, this alternator combines precision engineering with durable materials to ensure consistent performance even in tough operating conditions.
Operating at a rated voltage of 24V DC and delivering a continuous output current of 120A, this alternator provides ample power to support the vehicle’s electrical systems, including lighting, ignition, and auxiliary components. Its robust design ensures stable power generation, preventing voltage fluctuations that can disrupt critical systems and reduce component lifespan.
Designed as a direct replacement for the original alternator in MERCEDES BUS O405 models from 1979 to 1987, it offers strong compatibility with the vehicle’s existing electrical architecture. This means installation is straightforward, requiring no extensive modifications, which saves time and effort for mechanics or vehicle owners.
Equipped with an internal voltage regulator, the alternator automatically adjusts output to match the vehicle’s electrical demands, optimizing efficiency and protecting sensitive electronics from overvoltage. This built-in feature also contributes to its maintenance-free operation, reducing the need for regular adjustments or part replacements.
Whether you’re replacing a worn-out alternator, performing routine maintenance, or upgrading your vehicle’s electrical system, the 24V 120A 0120689520 Bosch alternator is a dependable choice. It ensures long-term reliability, helping keep your MERCEDES BUS O405 running smoothly mile after mile, even in the demanding environments often faced by commercial vehicles.
ZKM81130 Common Application: Mercedes-Benz O405 1979-1987
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Voltage: |
24V |
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Amps: |
120A |
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Regulator: |
Internal |
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Shaft Size: |
Ø30mm |
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Pulley/Gooves: |
Ø107mm/Twin (1/2) |
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Mount Piv./D: |
311mm |
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Adj.Hole Dia: |
M12*1.5 |
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Piv.Hole Mount: |
Ø12.5mm |
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+B Output: |
M8 |
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Exhaust Part: |
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OE No: |
0120689520 |
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Hella: CA 824IR |
LESTER: |
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A=48 |
B=16 |
C=180 |
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Changzhou Hancheng Auto Parts Co., Ltd. is a modern industrial and trading enterprise integrating R&D, production, and sales, with many years of experience in the automotive motor industry. With 27 years of production experience, we operate under the domestic brand BAIXIN and the international brand ZEKEMARK. We have 120 distributors in China, and export to countries and regions such as South Africa, Dubai, and Thailand. Our specialty products are the BOSCH and DENSO series motors, and we also accept OEM customization.
Industry Advantages: Leveraging our own production base and global trade network, we ensure comprehensive control over the entire process, from raw material sourcing and precision manufacturing to end-user sales, ensuring consistent quality and efficient delivery. Our production workshop is equipped with automated production lines and precision testing equipment, strictly adheres to the ISO16949 quality management system, and our products have obtained multiple international certifications.

