The 2021 BMW M440I has 3 electrical connector parts with verified fitment on this page — 3 part types and 3 brands, covering the 3.0L L6 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2021 BMW M440I, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. All 3 listed parts are Knock / Detonation Sensor Connector (1 part), Pin Connector (1 part) and Temperature Sender / Sensor Connector (1 part).
Every part on this page is matched to the 3.0L L6 Turbocharged — the only engine offered in the 2021 BMW M440I.
The most listed brands for 2021 BMW M440I electrical connector parts are WALKER PRODUCTS (1 part), ÜRO PARTS (1 part) and STANDARD MOTOR PRODUCTS (1 part).
Each part number listed for the 2021 BMW M440I opens a page with every vehicle that part fits.
Knock / Detonation Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WALKER PRODUCTS | 2701034 | 🇺🇸 US 🇨🇦 CA | M440i Base 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 M440I — WALKER PRODUCTS 2701034.
Pin Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ÜRO PARTS | 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 | 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 M440I — STANDARD MOTOR PRODUCTS S2860.
Buying Electrical Connector Parts for a 2021 BMW M440I
On this vehicle, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.
- Confirm you have the 3.0L L6 Turbocharged engine — every part on this page is matched to it.
- 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 M440I?
Our catalog currently lists 3 electrical connector parts for the 2021 BMW M440I across 3 subcategories and 3 brands, covering the 3.0L L6 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical connector problems on a 2021 BMW M440I?
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 M440I 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 M440I?
Every part on this page is matched to the 3.0L L6 Turbocharged engine. 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 M440I
Electrical Connector Parts for Other BMW M440I Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.