BMW X5 Owners & Service Manuals

BMW X5: Battery Charging

If a normal or quick charger is used to charge the battery, the battery must be disconnected from the vehicle electrical system and removed. This prevents damage to paintwork and upholstery.

Ideally, battery charging is performed with BMW-approved charging computers.

IMPORTANT: In order to prevent the intelligent battery sensor from malfunctioning, the charging terminals in the engine compartment must be used without fail in vehicles from E60 and should be used if possible in other vehicles.

IMPORTANT: Before charging the battery while it is installed, first carry out a closed-circuit current test. If here the voltage is 10 V or less, one or more of the cells may be faulty or the entire battery may already be damaged. In this case, always remove the battery as escaping gases during charging could damage the interior equipment and trim. Attempt to regenerate faulty cells with low charging current.

If necessary, open existing plugs on the individual cells.

BATTERY OPEN-CIRCUIT CURRENT TEST

NOTE: Observe safety instructions for handling vehicle battery.

Battery
Fig. 154: Identifying Diagnosis And Information System

The open-circuit current test is performed using the Diagnosis and Information System (DIS).

DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD

WARNING: Observe safety instructions for handling vehicle battery.

IMPORTANT: Do not under any circumstances use force to pull/lever off Intelligent Battery Sensor (IBS).

Necessary preliminary tasks:

Release screws (1).

Remove battery cover (2) upwards.

Battery
Fig. 155: Identifying Battery Cover

Loosen nut (1).

Tightening torque.

Disconnect battery negative lead (2) with IBS and secure at side.

Battery
Fig. 156: Identifying Battery Negative Lead

PERFORMING BATTERY "POWER RESET" (FOR PROGRAMMING/CODING CONTROL UNIT(S) )

IMPORTANT: Observe safety instructions for handling vehicle battery.

The following steps must be carried out for a "power reset":

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 Battery Vapor Separator

REPLACING BATTERY NEGATIVE LEAD WARNING: Observe safety instructions for handling vehicle battery. Follow instructions for disconnecting and connecting battery. IMPORTANT: Do not under any circumst

 Switch

 Replacing Level Switch For Dynamic Drive Fluid Reservoir

Unscrew nuts. Remove shims. Installation: Replace self-locking nuts. Fig. 162: Locating Nuts NOTE: Raise and/or turn fluid reservoir in order to gain better access to plug connection. Disconnect pl

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 Emergency wheel

Principle In the event of a flat tire, the emergency wheel can be used in place of the wheel with the defective tire. The emergency wheel is only intended for temporary use until the defective tire/wheel has been replaced. General information Mount one emergency wheel only. Also check the tire infla

 Runflat tires

Principle Run-flat tires permit continued driving under restricted conditions even in the event of a complete tire pressure loss. General information The wheels consist of tires that are self-supporting, to a limited degree, and possibly special rims. The reinforcement of the sidewall allows the ti

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