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Positive battery cable
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- Newbie
- Posts: 2
- Joined: Mon Feb 03, 2025 11:25 pm
Positive battery cable
Greetings. Working on 07 Z4m and wondering where the cable in the trunk that runs to the engine bay connects to the battery terminal. How do you gain access to the nut to install a new cable assembly?
- Mr Tidy
- Legend
- Posts: 26022
- Joined: Wed Jul 02, 2014 12:18 pm
- Location: North West Surrey
Positive battery cable
Welcome to the forum.
I'm just wondering why you'd want to install a new cable assembly?

I'm just wondering why you'd want to install a new cable assembly?
Coupes because stunning!
Current - Silver Grey MC, Imola Red heated Nappa & carbon trim. Aeros, H & R Coil-overs, 224s, OE Strut brace, Nav, cup-holders, DSP Hi-Fi, pdc, cruise, MFSW, no CDV! E90 330i daily
Gone - Montego Blue
Gone - Ruby Black
Current - Silver Grey MC, Imola Red heated Nappa & carbon trim. Aeros, H & R Coil-overs, 224s, OE Strut brace, Nav, cup-holders, DSP Hi-Fi, pdc, cruise, MFSW, no CDV! E90 330i daily
Gone - Montego Blue
Gone - Ruby Black
- pvr
- Legend
- Posts: 27324
- Joined: Fri Jun 15, 2007 12:27 pm
- Location: South East UK
Positive battery cable
From which side? I have just disconnnected mine as I need to remove the firewall carpet, but the two main cables attach at the battery terminal.
Current:
911-50 Black - unique spec
X5M - 575 hp of fun in a V8
Abarth 595 Comp.
Golf Clipper - collectors item
Z4M Midnight Blue
VW ID.3
Previous:
Z4 3.0 SI black sapphire
Z4M Silver Grey - non flimper spec (gone to Bing)
Z4 3.0 Toledo
911-50 Black - unique spec
X5M - 575 hp of fun in a V8
Abarth 595 Comp.
Golf Clipper - collectors item
Z4M Midnight Blue
VW ID.3
Previous:
Z4 3.0 SI black sapphire
Z4M Silver Grey - non flimper spec (gone to Bing)
Z4 3.0 Toledo
-
- Newbie
- Posts: 2
- Joined: Mon Feb 03, 2025 11:25 pm
Positive battery cable
The terminal that connects to the positive post will not tighten enough to get good contact. I bought a replacement assembly. The cable end that goes through the trunk floor is the one i cannot find.