17 Electrical switch & relay parts are listed for the 2020 BMW X4, in 7 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.
The switch and relay system on the 2020 BMW X4 covers the switches, relays and flashers that route power to everything the driver touches. The largest groups are Oil Pressure Sender / Switch (5 parts), A/C Refrigerant Pressure Switch (3 parts) and Brake Light Switch (3 parts). The other 4 part types cover the remaining 6 parts.
The 2020 BMW X4 was sold with both the 2.0L L4 Turbocharged and the 3.0L L6 Turbocharged. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2020 BMW X4 electrical switch & relay parts are WELLS (8 parts), VEMO (2 parts) and FOUR SEASONS (1 part), plus 6 more brands. Quality grades include Standard Replacement and Economy.
1 part on this 2020 BMW X4 page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — STANDARD MOTOR PRODUCTS PS754 (Oil Pressure Sender / Switch). Click any part number to see every vehicle that part fits.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS Fits: 3.0L L6 Turbocharged | 20997 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Switch | View on Amazon |
| REIN Fits: 3.0L L6 Turbocharged | ACS0243P | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| UAC Fits: 3.0L L6 Turbocharged | SW11170C | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Transducer | View on Amazon |
This table covers the pressure switches on the A/C circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
3 A/C Refrigerant Pressure Switch parts for the 2020 BMW X4 come from 3 brands — FOUR SEASONS, REIN and UAC.
Part numbers include FOUR SEASONS 20997, REIN ACS0243P and UAC SW11170C.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO Fits: 3.0L L6 Turbocharged | V20730151 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Fits: 3.0L L6 Turbocharged | 2012711 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WELLS Fits: 3.0L L6 Turbocharged | 1S12667 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the pedal-mounted switch that turns on the brake lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
3 Brake Light Switch parts for the 2020 BMW X4 come from 3 brands — VEMO, BECK/ARNLEY and WELLS.
The Economy section lists 1 option from VEMO — the catalog's value-priced group. VEMO V20730151 is listed in this group.
In the Standard Replacement grade, BECK/ARNLEY and WELLS supply 2 parts: built to original-equipment specification. A representative part number is BECK/ARNLEY 2012711.
Part numbers include VEMO V20730151, BECK/ARNLEY 2012711 and WELLS 1S12667.
Headlamp Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: 3.0L L6 Turbocharged | 1S18201 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with LED Fog Lights | View on Amazon |
| WELLS Fits: 3.0L L6 Turbocharged | 1S18217 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without LED Fog Lights | View on Amazon |
This table covers the column or dash switches that control the exterior lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
WELLS supplies both parts for the 2020 BMW X4.
Listed part numbers: WELLS 1S18201 and WELLS 1S18217.
Ignition Starter Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: 3.0L L6 Turbocharged | 1S17770 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Push Button Switchwith Start/Stop Feature | View on Amazon |
| WELLS Fits: 3.0L L6 Turbocharged | 1S17772 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Push Button Switchwithout Start/Stop Feature | View on Amazon |
This table covers the ignition switches that feed the starter circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
WELLS supplies both parts for the 2020 BMW X4.
Listed part numbers: WELLS 1S17770 and WELLS 1S17772.
Oil Pressure Sender / Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: 3.0L L6 Turbocharged | PS754 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| FACET Fits: 3.0L L6 Turbocharged | 250015 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| GPD Fits: 3.0L L6 Turbocharged | 1816559 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Light | View on Amazon |
| WELLS Fits: 3.0L L6 Turbocharged | 1S16103 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | M Competition or M Model | View on Amazon |
| WELLS Fits: 3.0L L6 Turbocharged | 1S15907 | 🇺🇸 US 🇨🇦 CA | M40i Model | View on Amazon |
This table covers the senders and switches that report oil pressure to the gauge or lamp. Typical signs include a lamp that stays on, or a gauge that never moves. Confirm power and ground at the connector before replacing the sender or switch.
5 Oil Pressure Sender / Switch parts for the 2020 BMW X4 come from 4 brands — WELLS, STANDARD MOTOR PRODUCTS, FACET and 1 other brand. The "Popular" part is STANDARD MOTOR PRODUCTS PS754.
Listed part numbers: STANDARD MOTOR PRODUCTS PS754, FACET 250015 and GPD 1816559, plus the other parts above.
Power Window Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO Fits: 3.0L L6 Turbocharged | V20730271 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits RearColor: Black | View on Amazon |
This table covers the switches that command each window motor. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
This group shows a single part: VEMO V20730271.
Turn Signal Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: 3.0L L6 Turbocharged | 1S17937 | 🇺🇸 US 🇨🇦 CA | M40i Model | View on Amazon |
This table covers the combination / turn-signal switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
This group shows a single part: WELLS 1S17937.
Buying Electrical Switch & Relay Parts for a 2020 BMW X4
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Match the engine first. Every electrical switch & relay part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Oil Pressure Sender / Switch and A/C Refrigerant Pressure Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2020 BMW X4?
Our catalog currently lists 17 electrical switch & relay parts for the 2020 BMW X4 across 7 subcategories and 9 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 switch & relay parts differ between 2020 BMW X4 engines?
Yes. Every electrical switch & relay part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical switch & relay problems on a 2020 BMW X4?
Common symptoms include accessories that work intermittently, a click without action, or one function dead while its fuse tests fine. 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, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
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 2020 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 2020 BMW X4?
First match the engine — each row shows which engine(s) the part fits. Then swap a suspect relay with an identical known-good one from the fuse box before buying — it is the fastest diagnostic there is. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2020 BMW X4
Electrical Switch & Relay Parts for Other BMW X4 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.