Quick answer: Battery Replacement on a 2011–2016 BMW 5 Series is rated Moderate and takes about 30–45 minutes. You'll need 6 tools for this job, and parts cost about $147. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name |
Part Number |
Price |
Buy |
| Correct group-size battery |
— |
$140.00 |
|
| Terminal cleaner Optional |
— |
$8.00 |
|
| Terminal protectant |
— |
$7.00 |
|
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Step-by-Step Instructions
Follow these steps carefully
1
Access the battery under the trunk floor
Park, switch off the engine, and open the trunk. Remove the floor carpet and any panels covering the right side of the trunk to reveal the battery well.
🔧 Mechanic's note — Tom Becker
I tell everyone in my shop to study how that positive distribution assembly attaches before you loosen anything — it comes off one way, and forcing it cracks the fuse housing. Ten seconds of looking saves a tow to the dealer.
2
Disconnect the negative cable first
Identify the negative terminal with the Intelligent Battery Sensor clamped to it. Loosen its 10mm nut and lift the cable straight off the post without bending the sensor.
3
Remove the positive distribution assembly
Flip open the red cover on the positive terminal. Remove the assembly’s retaining nut (10mm) and lift the whole block straight up and off the post — do not yank the cable sideways or strike the block.
🔧 Mechanic's note — Ray Delgado
Lift that distribution block straight up — never sideways. I have seen the battery safety terminal inside it damaged by one sideways yank, and that turns a battery job into a parts-ordering week.
4
Disconnect the vent hose and hold-down
Pull the vent hose off the battery’s vent elbow — the trunk-mounted battery vents hydrogen outside the car, and this hose must be reconnected to the new battery. Remove the hold-down bracket at the battery’s base (13mm bolt) and lift the bracket clear.
5
Swap the batteries
This is a large, heavy battery — lift with your legs or use a carrier strap. Wipe or brush debris out of the tray, then lower the new battery in with the terminals on the same side as the old one.
6
Secure and reconnect
Reinstall the hold-down bracket and tighten its 13mm bolt so the battery cannot move. Push the vent hose firmly onto the new battery’s vent elbow. Brush the cable ends and posts clean with a battery-terminal brush and apply corrosion inhibitor. Seat the positive distribution assembly fully onto the positive post and tighten its nut, then reconnect the negative cable last. Tighten both until they cannot twist by hand.
7
Start up, reset, and register
Start the engine and verify normal cranking and no new warning lights. Check your owner’s manual and have a dealer or qualified shop complete the registration.
All Done!
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
- • Yanking the positive cable instead of unbolting the distribution block — the F10’s positive terminal carries the fuse and distribution assembly with the battery safety terminal, and forcing it can break the block.
- • Skipping battery registration — the F10’s IBS-monitored system keeps charging as if the old battery is still installed, shortening the new one’s life.
- • Forgetting the vent hose — hydrogen from the trunk-mounted battery must be routed outside the car.
