The BMW E30 comes with a group 49 battery in the vehicle. If You need to replace it You should make sure to get a battery that has at least 600 cold cranking amps of power in it to be able to move Your starter at low temperatures. The two most common types of batteries on the market these days are AGM and lead acid. The AGM batteries are newer technology and use gel and a glass mat inside of them. This means You will never have to service the AGM battery and fill it with water like a lead acid. The only downside to an AGM battery is they do cost more than the older style lead acid option.
Antonio J.
April 10, 2020
Group size 49 900 cca is the bmw e30 battery size and they will cost you about 230 dollars for a new one.
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