Editing Openai/6940b2df-db80-8003-b707-4cc5cbedf6d9 (section)

=== Assistant: Thanks — with your VIN WBAVA33557PG51900 this confirms what your E90 needs for a full-length positive battery cable rea… ===
Thanks — with your VIN (WBAVA33557PG51900) this confirms what your E90 needs for a full-length positive battery cable (rear trunk battery to A46 and forward feed) on your 2007 328i.

Here are the correct OEM part numbers and options you should be ordering:

==== ### ====

✔️ BMW part # 61126938504 — Positive battery lead from the power distribution box (A46) to the battery/trunk area for E90/E92/E93 models. BimmerWorld<ref>{{cite web|title=BimmerWorld|url=https://www.bimmerworld.com/Safety-Race-Interior/Battery-Electrical/Positive-Battery-Lead-AM-61126938504-E90-E91-E92-E93.html|publisher=bimmerworld.com|access-date=2025-12-16}}</ref>
This is the section that goes from the distribution box back to the battery and should replace the damaged section you removed.

===== ✔️ BMW part # 61129205520 — Genuine positive battery lead cable assembly (rear to engine/starter). BMW Parts Deal<ref>{{cite web|title=BMW Parts Deal|url=https://www.bmwpartsdeal.com/parts/bmw-positive_battery_lead-61129205520.html?srsltid=AfmBOoqz1IG1Z9EeL3CyyoXKbKU89eT1UDS7QBeVMl9aTNEOU6EhPxjh|publisher=BMW Parts Deal|access-date=2025-12-16}}</ref> =====
This part is the complete front-to-back positive cable that includes the A46 connection point and the main feed forward.
* Uses exact BMW wiring, correct gauge, correct crimps
* Highest reliability
* Matches original routing and connectors

: 

===== In some catalogs this cable may also be listed under alternate OEM numbers that fit the E90 family, such as: =====
* 61129217031 — Positive battery cable lead compatible with E90/E92 (aftermarket/OEM) FridayParts<ref>{{cite web|title=FridayParts|url=https://www.fridayparts.com/positive-battery-cable-lead-srs-61129217031-for-bmw-e90-e91-e92-3-series|publisher=fridayparts.com|access-date=2025-12-16}}</ref>

You’ll want to confirm exact fitment with the seller or parts lookup for your VIN, but 61126938504 and 61129205520 are the most direct OEM matches.

==== Best (full-coverage replacement): ====
➡️ BMW 61129205520 – Genuine full positive battery lead cable assembly from trunk battery through distribution and forward. BMW Parts Deal<ref>{{cite web|title=BMW Parts Deal|url=https://www.bmwpartsdeal.com/parts/bmw-positive_battery_lead-61129205520.html?srsltid=AfmBOoqz1IG1Z9EeL3CyyoXKbKU89eT1UDS7QBeVMl9aTNEOU6EhPxjh|publisher=BMW Parts Deal|access-date=2025-12-16}}</ref>

Good (just the rear segment):
➡️ BMW 61126938504 – Positive lead from rear distribution box (A46) to battery. BimmerWorld<ref>{{cite web|title=BimmerWorld|url=https://www.bimmerworld.com/Safety-Race-Interior/Battery-Electrical/Positive-Battery-Lead-AM-61126938504-E90-E91-E92-E93.html|publisher=bimmerworld.com|access-date=2025-12-16}}</ref>

==== - Replace both the cable and the distribution box (A46) as a matched pair to eliminate resistance points. ====
* Torque the distribution box’s main stud to 15 Nm (as indicated on your new A46).
* Only OEM or properly crimped lugs should be used — no homemade crimps.

This correct cable and box combination will restore proper high-current feed and likely fix your key-on voltage drop and no-start issue.

If you want, I can link you to specific OEM part sellers that match your VIN exactly. Just say so!