The 2019 Mazda 6 has 27 electrical switch & relay parts with verified fitment on this page — 10 part types and 13 brands, covering the 2.5L L4 engine. Each part includes a manufacturer part number and application notes.
The switch and relay system on the 2019 Mazda 6 covers the switches, relays and flashers that route power to everything the driver touches. The largest groups are Brake Light Switch (8 parts), A/C Refrigerant Pressure Switch (4 parts) and Fog / Driving Lamp Relay (4 parts). The other 7 part types cover the remaining 11 parts.
The 2019 Mazda 6 came with a single engine, the 2.5L L4, and every part is verified against it.
13 brands supply electrical switch & relay parts for the 2019 Mazda 6, led by STANDARD MOTOR PRODUCTS (10 parts), UAC (3 parts) and HOLSTEIN (2 parts), plus 10 more brands. Quality grades include Economy and Standard Replacement.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2019 Mazda 6. 2 parts have it, including ULTRA-POWER SLS355 (Brake Light Switch) and STANDARD MOTOR PRODUCTS SLS355 (Brake Light Switch). Each part number opens a page with every vehicle that part fits.
A/C Compressor Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2RSW0006 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Control Relay | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY805T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-Series | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY805 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Functions: Multi-Function 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.
3 A/C Compressor Relay parts are listed for the 2019 Mazda 6, from STANDARD MOTOR PRODUCTS and HOLSTEIN.
Part numbers include HOLSTEIN 2RSW0006, STANDARD MOTOR PRODUCTS RY805T and STANDARD MOTOR PRODUCTS RY805.
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 are listed for the 2019 Mazda 6, from 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 | RE8415 | 🇺🇸 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.
One part is listed for the 2019 Mazda 6 — UAC RE8415.
Blower Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| UAC | SW11578C | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Blower Switch Rotary | View on Amazon |
This table covers the Blower 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 2019 Mazda 6 — UAC SW11578C.
Body Wiring Harness Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | RY805T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-Series | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY805 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Functions: Multi-Function Relay | View on Amazon |
This table covers the relays that control the Body Wiring Harness 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.
STANDARD MOTOR PRODUCTS supplies both parts for the 2019 Mazda 6.
This group includes STANDARD MOTOR PRODUCTS RY805T and STANDARD MOTOR PRODUCTS RY805.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ULTRA-POWER Popular | SLS355 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| AUTOTECNICA | MA1319181 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| DORMAN | 920493 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| STANDARD MOTOR PRODUCTS | SLS355T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-SeriesColor/Finish: Blue, Gray | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | SLS355 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Color/Finish: Black, Blue | View on Amazon |
| BECK/ARNLEY | 2012742 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| ROSTRA | 620296 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WELLS | 1S8007 | 🇺🇸 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.
8 Brake Light Switch parts are listed for the 2019 Mazda 6, from STANDARD MOTOR PRODUCTS, ULTRA-POWER, AUTOTECNICA and 4 other brands. ULTRA-POWER SLS355 carries the "Popular" badge.
In the Economy grade, ULTRA-POWER, AUTOTECNICA, DORMAN and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is ULTRA-POWER SLS355.
The Standard Replacement section lists 4 options from STANDARD MOTOR PRODUCTS, BECK/ARNLEY, ROSTRA and 1 other brand — built to original-equipment specification. STANDARD MOTOR PRODUCTS SLS355 is listed in this group.
Part numbers include ULTRA-POWER SLS355, AUTOTECNICA MA1319181 and DORMAN 920493, among others listed above.
Fog / Driving Lamp Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2RSW0006 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| ROSTRA | 600063 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| STANDARD MOTOR PRODUCTS | RY805T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-Series | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY805 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Functions: Multi-Function Relay | View on Amazon |
This table covers the relays that control the Fog / Driving Lamp 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.
4 Fog / Driving Lamp Relay parts are listed for the 2019 Mazda 6, from STANDARD MOTOR PRODUCTS, HOLSTEIN and ROSTRA.
Listed part numbers: HOLSTEIN 2RSW0006, ROSTRA 600063 and STANDARD MOTOR PRODUCTS RY805T, plus the other parts above.
Fog / Driving Lamp Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | CBS2456 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Column Mounted | View on Amazon |
This table covers the Fog / Driving Lamp 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: STANDARD MOTOR PRODUCTS CBS2456.
Fuel Pump / Circuit Opening Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH | 0332011007 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi-Purpose Relay | View on Amazon |
| WELLS | 1R3684 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the relays that control the Fuel Pump / Circuit Opening 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.
2 Fuel Pump / Circuit Opening Relay parts are listed for the 2019 Mazda 6, from BOSCH and WELLS.
Listed part numbers: BOSCH 0332011007 and WELLS 1R3684.
Headlamp Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | CBS2456 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mounted on Steering Column | 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: STANDARD MOTOR PRODUCTS CBS2456.
Buying Electrical Switch & Relay Parts for a 2019 Mazda 6
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 2.5L 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: Brake Light Switch and A/C Refrigerant Pressure Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2019 Mazda 6?
Our catalog currently lists 27 electrical switch & relay parts for the 2019 Mazda 6 across 10 subcategories and 13 brands, covering the 2.5L 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 6?
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 6 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 6?
Every part on this page is matched to the 2.5L 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 6
Electrical Switch & Relay Parts for Other Mazda 6 Years
Switch vehicle or jump to a subcategory
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.