[SikhM4CS]

Hello,

Does anyone have a clue about where exactly negative battery terminal is in 440i. I did check owners manual, but didnt give much info. It shows aid-terminals connected in front neae washer fluid but not sure.

[Billfitz]

It's on the battery, which is in the trunk.

[SikhM4CS]

Originally Posted by Billfitz

It's on the battery, which is in the trunk.

I tried looking for access but was unsuccessful. Im a newbie to 440i so yeah lol

[donkey]

Originally Posted by singhbimmerwala

I tried looking for access but was unsuccessful. Im a newbie to 440i so yeah lol

Look on the right in the trunk, there's a panel that holds some crap that can be removed, it's under that

[chiefneil]

Do you actually need the negative terminal, or just a ground to attach a jumper cable to? If it's the latter, just clamp to a bolt or strut in the engine bay; there's probably a bolt marked for it near the positive terminal.

[bimmer456]

There is a positive battery terminal under the hood and a negative post attached to the frame on the left side. You hook up jumper cables to these posts when jumping.

[SikhM4CS]

Originally Posted by bimmer456

There is a positive battery terminal under the hood and a negative post attached to the frame on the left side. You hook up jumper cables to these posts when jumping.

I attached photos. I need to disconnect negative terminal to install JB4 sir

[SikhM4CS]

Originally Posted by drive335

Look on the right in the trunk, there's a panel that holds some crap that can be removed, it's under that

I check both panels on sides. I attached photos, can you please highlight where exactly?

[Beek]

Open trunk, on passenger side near rear of car is the battery location. Simply remove any panels or cargo tray like items and you should see the battery. edit: look under the recessed storage compartment

[bimmer456]

Originally Posted by singhbimmerwala

I attached photos. I need to disconnect negative terminal to install JB4 sir

Then you need to disconnect the battery in the trunk. You just need to disconnect the negative terminal.

[PhilHasBread]

Originally Posted by singhbimmerwala

Hello,

Does anyone have a clue about where exactly negative battery terminal is in 440i. I did check owners manual, but didnt give much info. It shows aid-terminals connected in front neae washer fluid but not sure.

on the last picture under the bonnet, or hood, the positive terminal (which you already found) is under the red cap and the negative I believe it the bolt with a brown wire running of it.

[Gen13 F36]

Question is the OP trying to work on the electrical system that the needed to unplug the battery, then he need to go the trunk to disconnect the battery.

If the OP just want to jump the car or charge the battery, he can do that in the post located in the engine bay.

We don't know what he (OP) trying to do.

[IK6SPEED]

Originally Posted by PhilHasBread

on the last picture under the bonnet, or hood, the positive terminal (which you already found) is under the red cap and the negative I believe it the bolt with a brown wire running of it.

If OP hasn't found negative terminal in 3+ years since he posted question, he'll never find it now.

Since he hasn't been on forum since 2018, he probably gave up and sold car

[upsidedownfunnel]

Originally Posted by Gen13 F36

Question is the OP trying to work on the electrical system that the needed to unplug the battery, then he need to go the trunk to disconnect the battery.

If the OP just want to jump the car or charge the battery, he can do that in the post located in the engine bay.

We don't know what he (OP) trying to do.

I'm not sure why this was resurrected, but OP clearly wants to disconnect the battery to install some electrical components.

In case someone lands on this in a search, here is where to access the battery. Remember folks, always disconnect the cable from the negative terminal, not the positive terminal.

[Gen13 F36]

Dammit I got had...damn you PhilhasBread.... wtf.

Fix your forum browsing setting, it should show the recent thread not the old thread

[Rebound]

To kill power, yes, it's in the trunk. Do Not disconnect the positive terminal first. Always, on any car, disconnect the negative terminal. That way, if your wrench touches metal, you won't cause a short.

Here is your engine bay photo. I highlighted the Positive and Negative terminals for jump starting (NOT for disconnecting power!) Note that if you're ever working on one of these engines and you remove the plastic cover over the Red terminal in the engine, cover it with a cloth while you're working, so that you don't accidentally cause a short.

[dmaxdmax]

Originally Posted by Rebound

To kill power, yes, it's in the trunk. Do Not disconnect the positive terminal first. Always, on any car, disconnect the negative terminal. That way, if your wrench touches metal, you won't cause a short.

Here is your engine bay photo. I highlighted the Positive and Negative terminals for jump starting (NOT for disconnecting power!) Note that if you're ever working on one of these engines and you remove the plastic cover over the Red terminal in the engine, cover it with a cloth while you're working, so that you don't accidentally cause a short.

Guess you missed this is a 3 year old thread. In any case, I wish I'd read your tip before using a metal rod to remove leaves under the +terminal. I did get a spark, but fortunately, my car lived through it.

[Rebound]

Originally Posted by dmaxdmax

Guess you missed this is a 3 year old thread. In any case, I wish I'd read your tip before using a metal rod to remove leaves under the +terminal. I did get a spark, but fortunately, my car lived through it.

Dammit, I hate when that happens!