4 Electrical connector parts are listed for the 2021 BMW X4, in 4 part types, covering both the 2.0L L4 Turbocharged and the 3.0L L6 Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2021 BMW X4, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. Most of the listed parts are Knock / Detonation Sensor Connector (1 part), Pin Connector (1 part) and Temperature Sender / Sensor Connector (1 part). The other 1 part type covers the remaining 1 part.
The 2021 BMW X4 was sold with both the 2.0L L4 Turbocharged and the 3.0L L6 Turbocharged. All 4 parts on this page fit every engine.
The most listed brands for 2021 BMW X4 electrical connector parts are WALKER PRODUCTS (1 part), ÜRO PARTS (1 part) and STANDARD MOTOR PRODUCTS (1 part), plus 1 more brand.
Each part number listed for the 2021 BMW X4 opens a page with every vehicle that part fits.
Knock / Detonation Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WALKER PRODUCTS Fits: all 2021 X4 engines | 2701034 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits M40i Modelor M Competition or M Model | View on Amazon |
This table covers the harness connectors at the Knock / Detonation Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2021 BMW X4 — WALKER PRODUCTS 2701034.
Pin Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ÜRO PARTS Fits: all 2021 X4 engines | 61130005199 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | White Wire0.2-0.5mm | View on Amazon |
This table covers the harness connectors at the Pin. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: ÜRO PARTS 61130005199.
Temperature Sender / Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 X4 engines | S2860 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: OvalGauge: 16 Gauge | View on Amazon |
This table covers the harness connectors at the Temperature Sender / Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2021 BMW X4 — STANDARD MOTOR PRODUCTS S2860.
Trailer Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT Fits: all 2021 X4 engines | 56557 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Vehicle-Side Custom 4-Pin Trailer Wiring Harness | View on Amazon |
This table covers the trailer-lighting connectors at the hitch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: CURT 56557.
Buying Electrical Connector Parts for a 2021 BMW X4
On this vehicle, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.
- You do not need to pick an engine: every electrical connector part on this page fits both the 2.0L L4 Turbocharged and the 3.0L L6 Turbocharged.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Knock / Detonation Sensor Connector and Pin Connector .
Frequently Asked Questions
How many electrical connector parts fit the 2021 BMW X4?
Our catalog currently lists 4 electrical connector parts for the 2021 BMW X4 across 4 subcategories and 4 brands, covering both the 2.0L L4 Turbocharged and the 3.0L L6 Turbocharged. Each part is matched to the engine(s) it fits.
Do electrical connector parts differ between 2021 BMW X4 engines?
No. On this page every electrical connector part fits both the 2.0L L4 Turbocharged and the 3.0L L6 Turbocharged. You do not need to pick an engine to choose the right row — use the notes for position and trim.
What are the signs of electrical connector problems on a 2021 BMW X4?
Common symptoms include intermittent faults that move when the harness is wiggled, green corrosion inside a plug, or melted connector housings near heat sources. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 BMW X4 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2021 BMW X4?
Every part on this page already fits both the 2.0L L4 Turbocharged and the 3.0L L6 Turbocharged. Then match the connector by terminal count and keyway, not just appearance — many families look identical but will not lock. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 BMW X4
Electrical Connector Parts for Other BMW X4 Years
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