Capacity, Voltage, and Size of Accumulators for the BMW Z4.

Z4 Roadster (E89) 2009-2020

Modification Terminal Polarity Voltage Capacity Recommended size
sDrive 30 i Type 1 right + 12 V 70 Ah 278 mm (L) - 175 mm (W) - 190 mm (H)

Z4 Roadster (E85) 2003-2009

Modification Terminal Polarity Voltage Capacity Recommended size
3.0 si Type 1 right + 12 V 70 Ah 278 mm (L) - 175 mm (W) - 190 mm (H)
3.0 si Type 1 right + 12 V 77 Ah 278 mm (L) - 175 mm (W) - 190 mm (H)
3.0 si Type 1 right + 12 V 60 Ah 242 mm (L) - 175 mm (W) - 190 mm (H)
3.0 si Type 1 right + 12 V 56 Ah 242 mm (L) - 175 mm (W) - 190 mm (H)
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