Bosch AGM Battery (Group 34)

This Bosch AGM battery is a Group 34 replacement built around Bosch S6 specifications. Bosch has been a global leader in automotive technology since 1886, pioneering innovations like electronic fuel injection and oxygen (lambda) sensors that shaped modern engine management. Today, Bosch supplies OEM-quality sensors, engine electronics, ignition components, and braking parts found in vehicles worldwide. Known for precision engineering and reliable performance, Bosch parts are built to factory specifications for dependable fitment and long-term durability.

Technical Details

• Manufacturer part number: S6521B
• Battery type: AGM starter battery
• BCI group size: 34
• Capacity and output: 55 Ah, 775 CCA, 890 CA
• Case size: 273 x 175 x 203 mm

Fitment & Compatibility

Confirm compatibility using the manufacturer part number, group size, and case dimensions listed above.

If you would like help verifying fitment, contact us with your VIN and part number so we can confirm the correct application.