BMW X5: Replacing Battery Negative Lead
WARNING: Observe safety instructions for handling vehicle battery. Follow instructions for disconnecting and connecting battery.
IMPORTANT: Do not under any circumstances use force to pull/lever off Intelligent Battery Sensor (IBS).
Necessary preliminary tasks:
- Raise luggage compartment floor trim
Release screws (1).
Remove battery cover (2) upwards.
Fig. 149: Identifying Battery Cover
Loosen nut (1).
Tightening torque.
Remove battery negative lead with IBS.
Disconnect plug connection (2).
Unscrew nut (3).
Tightening torque.
Fig. 150: Identifying Plug Connection
THRESHOLD VALUES FOR BATTERY INSPECTION OF ALL BATTERY (TELEPHONE EXCEPT FOR TELEPHONE BATTERY)
Safety instructions for handling vehicle battery.
Test step 1 - before charging the battery
THRESHOLD VALUES FOR BATTERY INSPECTION - BEFORE CHARGING BATTERY
(1) Charge condition and starting power must always be evaluated together
(2) When test charging for more than 5 hours, use charger Gossen CG 32 or
Siemens / Gossen VB 801
(3) Fully charge until charge state is more than 80 %.
Test step 2 - after charging the battery
THRESHOLD VALUES FOR BATTERY INSPECTION - AFTER CHARGING BATTERY
(1) Charge condition and starting power must always be evaluated together
(2) When test charging for more than 5 hours, use charger Gossen CG 32 or
Siemens / Gossen VB 801
NOTE: If battery was checked on the positive terminal in the engine compartment, repeat check directly on battery for sake of safety.
READ NEXT:
AGM Battery
Fig. 151: Identifying AGM Battery
Introduction
In September 2002 so-called VRLA batteries, better known as AGM batteries ,
were introduced.
(VRLA stands for Valve Regulated Lead Acid, i.e. lead aci
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 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
SEE MORE:
Antilock Braking System
ABS
The Antilock Braking System (ABS) prevents
locking of the wheels during braking.
The vehicle maintains its steerability even during
emergency braking, which increases the active
driving safety.
ABS is operational every time you start the engine.
Brake assistant
The Brake Assistant effects maximum
General Information On Intelligent Battery Sensor (IBS)
WARNING: Danger of destruction in event of mechanical strain
Do not introduce any additional connections at the battery
negative
terminal.
Do not modify the grounding cable.
The grounding cable also serves to dissipate heat.
Do not establish any connection between the IBS and the sensor
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