How to perform a parasitic draw test on the batteries of a 2007 BMW 335i?

If the vehicle battery is discharged for an unknown reason, perform the parasitic draw test designed to detect excessive current flow from the battery when everything in the vehicle is shut down, also known as a closed circuit current measurement. Check that battery voltage is 12 volts or higher and if lower, recharge battery. Remove negative cable and install battery isolation switch (OTC tool 7645 or equivalent). Close switch and connect digital multimeter in series across switch, setting meter to milliamp (mA) scale. Turn trunk lock to locked position using screwdriver or similar to simulate trunk lid being closed and keep all other doors and lids closed. To simulate normal parasitic draw conditions, switch ignition ON and activate all electrical consumers, including any accessories. Switch ignition OFF, open and close driver's door to simulate somebody getting out and lock car, arming alarm if installed. Open battery isolation switch and monitor current draw. For a vehicle without telematics (TCU), wait 30 minutes and for a vehicle with telematics (TCU), wait 60 - 70 minutes. The maximum allowable parasitic draw after waiting is approximately 40 mA. If draw exceeds maximum allowable, find consumer(s) at fault by removing individual fuses and noting change in parasitic draw. Repair or replace component(s) found at fault. Fuse locations and applications are in ECL Electrical Component Locations.

Genuine 2007 BMW 335i Batteries

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2007 BMW 335i Ep Battery 70Ah
Part Number: 61212353806
$108.08 MSRP: $145.00
You Save: $36.92 (26%)
Product Specifications
- Replaced by: 61212353817
- Item Weight: 5.40 Pounds
- Condition: New
- SKU: 61212353806
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following 2007 BMW 335i Submodels:
- Sedan(E90)
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2007 BMW 335i Ep Battery 80Ah
Part Number: 61212353808
$151.99 MSRP: $195.00
You Save: $43.01 (23%)
Product Specifications
- Item Weight: 7.40 Pounds
- Condition: New
- SKU: 61212353808
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following 2007 BMW 335i Submodels:
- Coupe(E92), Sedan(E90)
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2007 BMW 335i Ep Battery 70Ah
Part Number: 61212353811
$198.32 MSRP: $247.10
You Save: $48.78 (20%)
Product Specifications
- Replaced by: 61215A40E19
- Item Weight: 7.20 Pounds
- Condition: New
- SKU: 61212353811
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following 2007 BMW 335i Submodels:
- Sedan(E90)
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2007 BMW 335i Ep Battery 80Ah
Part Number: 61212353813
$204.81 MSRP: $255.21
You Save: $50.40 (20%)
Product Specifications
- Replaced by: 61215A40E31
- Item Weight: 7.80 Pounds
- Condition: New
- SKU: 61212353813
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following 2007 BMW 335i Submodels:
- Sedan(E90)
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2007 BMW 335i Battery, Manuf.: Exide (Warranty Only)
Part Number: 61217586962
$139.89 MSRP: $158.33
You Save: $18.44 (12%)
Product Specifications
- Other Name: Battery
- Replaces: 61-21-6-946-334
- Item Weight: 28.40 Pounds
- Condition: New
- SKU: 61217586962
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following 2007 BMW 335i Submodels:
- Coupe(E92), Sedan(E90)
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2007 BMW 335i Battery, Manuf.: Exide (Warranty Only)
Part Number: 61217586961
$139.89 MSRP: $158.33
You Save: $18.44 (12%)
Product Specifications
- Other Name: Battery
- Replaces: 61-21-6-946-333
- Item Weight: 29.50 Pounds
- Condition: New
- SKU: 61217586961
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following 2007 BMW 335i Submodels:
- Coupe(E92), Sedan(E90)
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2007 BMW 335i Ep Battery 92Ah
Part Number: 61212353812
$229.22 MSRP: $313.32
You Save: $84.10 (27%)
Product Specifications
- Replaced by: 61215A40E29
- Item Weight: 9.60 Pounds
- Condition: New
- SKU: 61212353812
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following 2007 BMW 335i Submodels:
- Convertible(E93), Coupe(E92), Sedan(E90), Sedan(F30)
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2007 BMW 335i Battery, Manuf.: Douglas (Warranty Only)
Part Number: 61218381738
$103.15 MSRP: $123.00
You Save: $19.85 (17%)
Product Specifications
- Other Name: Battery
- Item Weight: 30.10 Pounds
- Condition: New
- SKU: 61218381738
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following 2007 BMW 335i Submodels:
- Coupe(E92), Sedan(E90)
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2007 BMW 335i Battery, Manuf.: Douglas (Warranty Only)
Part Number: 61218381749
$114.05 MSRP: $136.00
You Save: $21.95 (17%)
Product Specifications
- Other Name: Battery
- Item Weight: 28.70 Pounds
- Condition: New
- SKU: 61218381749
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following 2007 BMW 335i Submodels:
- Coupe(E92), Sedan(E90)
View related parts
2007 BMW 335i Battery, Manuf.: Douglas (Warranty Only)
Part Number: 61218381762
$119.15 MSRP: $144.50
You Save: $25.35 (18%)
Product Specifications
- Other Name: Battery
- Replaces: 61-21-8-361-827
- Item Weight: 27.90 Pounds
- Condition: New
- SKU: 61218381762
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following 2007 BMW 335i Submodels:
- Coupe(E92), Sedan(E90)
View related parts
2007 BMW 335i Battery, Manuf.: Exide (Warranty Only)
Part Number: 61217586960
$174.96 MSRP: $218.41
You Save: $43.45 (20%)
Product Specifications
- Other Name: Battery
- Replaces: 61-21-6-946-332
- Item Weight: 30.10 Pounds
- Condition: New
- SKU: 61217586960
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following 2007 BMW 335i Submodels:
- Coupe(E92), Sedan(E90)

2007 BMW 335i Batteries

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2007 BMW 335i Batteries Parts Questions & Experts Answers

Q: How to perform a parasitic draw test on the batteries of a 2007 BMW 335i?
A: If the vehicle battery is discharged for an unknown reason, perform the parasitic draw test designed to detect excessive current flow from the battery when everything in the vehicle is shut down, also known as a closed circuit current measurement. Check that battery voltage is 12 volts or higher and if lower, recharge battery. Remove negative cable and install battery isolation switch (OTC tool 7645 or equivalent). Close switch and connect digital multimeter in series across switch, setting meter to milliamp (mA) scale. Turn trunk lock to locked position using screwdriver or similar to simulate trunk lid being closed and keep all other doors and lids closed. To simulate normal parasitic draw conditions, switch ignition ON and activate all electrical consumers, including any accessories. Switch ignition OFF, open and close driver's door to simulate somebody getting out and lock car, arming alarm if installed. Open battery isolation switch and monitor current draw. For a vehicle without telematics (TCU), wait 30 minutes and for a vehicle with telematics (TCU), wait 60 - 70 minutes. The maximum allowable parasitic draw after waiting is approximately 40 mA. If draw exceeds maximum allowable, find consumer(s) at fault by removing individual fuses and noting change in parasitic draw. Repair or replace component(s) found at fault. Fuse locations and applications are in ECL Electrical Component Locations.

Related 2007 BMW 335i Parts

Alternate Year Models

2008 BMW 335i Batteries