16 Electrical switch & relay parts are listed for the 2021 BMW M235I, in 8 part types, covering the 2.0L L4 Turbocharged engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2021 BMW M235I, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. 11 parts of the 16 listed are Brake Light Switch (4 parts), Oil Pressure Sender / Switch (4 parts) and A/C Refrigerant Pressure Switch (3 parts). The other 5 part types cover the remaining 5 parts.
The 2021 BMW M235I came with a single engine, the 2.0L L4 Turbocharged, and every part is verified against it.
10 brands supply electrical switch & relay parts for the 2021 BMW M235I, led by STANDARD MOTOR PRODUCTS (3 parts), VEMO (3 parts) and WELLS (3 parts), plus 7 more brands. Quality grades include Standard Replacement and Economy.
Each part number listed for the 2021 BMW M235I opens a page with every vehicle that part fits.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS | 20997 | 🇺🇸 US 🇨🇦 CA | Pressure Switch | View on Amazon |
| REIN | ACS0243P | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| UAC | SW11170C | 🇺🇸 US 🇨🇦 CA | 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 are listed for the 2021 BMW M235I, from FOUR SEASONS, REIN and UAC.
Part numbers include FOUR SEASONS 20997, REIN ACS0243P and UAC SW11170C.
ABS Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | RY776 | 🇺🇸 US 🇨🇦 CA | Terminal Quantity: 4 | View on Amazon |
This table covers the relays that control the ABS circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
One part is listed for the 2021 BMW M235I — STANDARD MOTOR PRODUCTS RY776.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V20730151 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY | 2012711 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS | SLS541 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS | 1S12667 | 🇺🇸 US 🇨🇦 CA | 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.
4 Brake Light Switch parts are listed for the 2021 BMW M235I, from VEMO, BECK/ARNLEY, STANDARD MOTOR PRODUCTS and 1 other brand.
In the Economy grade, VEMO supplies 1 part: the catalog's value-priced group. A representative part number is VEMO V20730151.
The Standard Replacement section lists 3 options from BECK/ARNLEY, STANDARD MOTOR PRODUCTS and WELLS — built to original-equipment specification. BECK/ARNLEY 2012711 is listed in this group.
Part numbers include VEMO V20730151, BECK/ARNLEY 2012711 and STANDARD MOTOR PRODUCTS SLS541, among others listed above.
Headlamp Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S18204 | 🇺🇸 US 🇨🇦 CA | 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.
This group shows a single part: WELLS 1S18204.
Ignition Starter Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V20800005 | 🇺🇸 US 🇨🇦 CA | 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.
This group shows a single part: VEMO V20800005.
Oil Pressure Sender / Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FACET | 250015 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| GPD | 1816559 | 🇺🇸 US 🇨🇦 CA | with Light | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS754 | 🇺🇸 US 🇨🇦 CA | with Light | View on Amazon |
| WELLS | 1S16103 | 🇺🇸 US 🇨🇦 CA | 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.
4 Oil Pressure Sender / Switch parts are listed for the 2021 BMW M235I, from FACET, GPD, STANDARD MOTOR PRODUCTS and 1 other brand.
Listed part numbers: FACET 250015, GPD 1816559 and STANDARD MOTOR PRODUCTS PS754, plus the other parts above.
Power Window Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V20730085 | 🇺🇸 US 🇨🇦 CA | Right | 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.
One part is listed for the 2021 BMW M235I — VEMO V20730085.
Radiator Fan Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ÜRO PARTS | 64116930015 | 🇺🇸 US 🇨🇦 CA | Inside Type 1Sensor | View on Amazon |
This table covers the Radiator Fan 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.
One part is listed for the 2021 BMW M235I — ÜRO PARTS 64116930015.
Buying Electrical Switch & Relay Parts for a 2021 BMW M235I
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Confirm you have the 2.0L L4 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, 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: Brake Light Switch and Oil Pressure Sender / Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2021 BMW M235I?
Our catalog currently lists 16 electrical switch & relay parts for the 2021 BMW M235I across 8 subcategories and 10 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical switch & relay problems on a 2021 BMW M235I?
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 2021 BMW M235I 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 M235I?
Every part on this page is matched to the 2.0L L4 Turbocharged engine. 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 2021 BMW M235I
Electrical Switch & Relay Parts for Other BMW M235I Years
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