Original BMW Rear B+ Junction Point Power Distribution Box for BMW X3 F25 and X4 F26 (2011–2018)

The Original BMW rear B+ junction point is the rear power distribution box on the battery positive circuit of the F25 BMW X3 and the F26 BMW X4. A B+ junction point is a connection block where heavy positive cables meet and branch off to feed other parts of the vehicle electrical system. BMW's parts data puts this unit at 368 g (0.8 lb), and it comes as a single piece. Production of this number began in April 2014, and the box is made in Germany. In the X3 electrical diagram for this assembly, it sits at position 3.

Original BMW Parts carry a 24-month parts warranty.

Part number 61-14-9-343-259 replaces the earlier 61-14-9-206-140. BMW marks the change as interchangeable with earlier production, so the newer box also fits X3 models built before April 2014, including 2011–2013 cars that left the factory with the older number. BMW names this the rear junction point, so match that position when you order. The same part covers the full F25 and F26 engine range in BMW's parts data, including the N20, N52N, and N55 gasoline engines and the N47N, B47, N57N, and N57Z diesels. Owners of both the X3 and the X4 order the same number, which keeps parts sourcing simple for shops that service both chassis.

Technical Details

• Manufacturer: BMW (Original BMW part)
• Part number: 61-14-9-343-259
• BMW part name: B+ junction point, rear
• Replaces: 61-14-9-206-140, interchangeable with earlier production
• Weight: 368 g (0.8 lb)
• Production start: April 2014
• Diagram position: 3
• Made in Germany
• Sold individually
• Warranty: 24 months on parts

Common Questions

Will this fit an X3 built before April 2014?
Yes. BMW marks 61-14-9-343-259 as interchangeable with the earlier 61-14-9-206-140, so it is the correct replacement for older F25 cars.

Is the X4 version different from the X3 version?
No. BMW uses this same number on the F25 X3 and the F26 X4.

Where is this part made?
This Original BMW junction point is made in Germany.

PMB Performance ships Original BMW electrical parts matched to your chassis.

Fitment & Compatibility

Compare your production year and trim against the table below. PMB Performance can confirm this against your VIN, backed by more than 20 years of parts and fitment work.