11 Electrical switch & relay parts are listed for the 2019 Mazda CX-3, in 3 part types, covering the 2.0L L4 engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
The switch and relay system on the 2019 Mazda CX-3 covers the switches, relays and flashers that route power to everything the driver touches. All 11 listed parts are A/C Compressor Relay (6 parts), A/C Refrigerant Pressure Switch (4 parts) and A/C System Relay (1 part).
Every part on this page is matched to the 2.0L L4 — the only engine offered in the 2019 Mazda CX-3.
The most listed brands for 2019 Mazda CX-3 electrical switch & relay parts are STANDARD MOTOR PRODUCTS (2 parts), FOUR SEASONS (2 parts) and UAC (2 parts), plus 5 more brands.
2 parts on this 2019 Mazda CX-3 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including STANDARD MOTOR PRODUCTS RY805T (A/C Compressor Relay) and STANDARD MOTOR PRODUCTS RY805 (A/C Compressor Relay). Click any part number to see every vehicle that part fits.
A/C Compressor Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | RY805T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-Series | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular | RY805 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Functions: Multi-Function Relay | View on Amazon |
| FOUR SEASONS | 36207 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Control Relay | View on Amazon |
| HOLSTEIN | 2RSW0006 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Control Relay | View on Amazon |
| ROSTRA | 600063 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Control Relay | View on Amazon |
| WELLS | 1R2324 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Control Relay | View on Amazon |
This table covers the relays that control the A/C Compressor 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.
6 A/C Compressor Relay parts for the 2019 Mazda CX-3 come from 5 brands — STANDARD MOTOR PRODUCTS, FOUR SEASONS, HOLSTEIN and 2 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS RY805T.
Part numbers include STANDARD MOTOR PRODUCTS RY805T, STANDARD MOTOR PRODUCTS RY805 and FOUR SEASONS 36207, among others listed above.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FACET | 250073 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| FOUR SEASONS | 20994 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Switch | View on Amazon |
| JAPANESE OE | 3ACP0030 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Sensata | View on Amazon |
| UAC | SW10087C | 🇺🇸 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.
4 A/C Refrigerant Pressure Switch parts for the 2019 Mazda CX-3 come from 4 brands — FACET, FOUR SEASONS, JAPANESE OE and 1 other brand.
Listed part numbers: FACET 250073, FOUR SEASONS 20994 and JAPANESE OE 3ACP0030, plus the other parts above.
A/C System Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| UAC | RE8414 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the relays that control the A/C System 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.
This group shows a single part: UAC RE8414.
Buying Electrical Switch & Relay Parts for a 2019 Mazda CX-3
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 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: A/C Compressor Relay and A/C Refrigerant Pressure Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2019 Mazda CX-3?
Our catalog currently lists 11 electrical switch & relay parts for the 2019 Mazda CX-3 across 3 subcategories and 8 brands, covering the 2.0L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical switch & relay problems on a 2019 Mazda CX-3?
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 2019 Mazda CX-3 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 2019 Mazda CX-3?
Every part on this page is matched to the 2.0L L4 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 2019 Mazda CX-3
Electrical Switch & Relay Parts for Other Mazda CX-3 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.