What role do Relay Boxes play in the operation of electrical accessories on Mazda 3?

Several electrical accessories in the vehicle, such as the fuel injection system, horns, starter, and fog lamps, use relays to transmit the electrical signal to the component. Relays operate by using a low-current circuit to open and close a high-current circuit. If a relay is defective, the associated component will not function properly. Most relays are typically mounted in the engine compartment and interior fuse or relay boxes.

What role do Relay Boxes play in the operation of electrical accessories on Mazda 6?

The vehicle has several electrical accessories which use relays to pass the electrical signal to the component like the fuel injection system, horns, starter and fog lamps. Relays are used to open and close a high current circuit (the power circuit) using a low current circuit (the control circuit). In the case of faulty relay, the part will not work correctly. A majority of the relays are located in the engine compartment and interior fuse relays.

Genuine Mazda Relay Boxes

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69 Relay Boxes found

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Mazda Junction Block Part Number: MH01-30-2G0
$638.04 MSRP: $871.81
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Product Specifications
- Other Name: Box, Junction; Junction Block
Fits the following Mazda Models:
- MX-30 EV | 2022-2023 | Base, Premium Plus | BATTERY EV (EV/BEV)
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Mazda Fuse & Relay Box Part Number: GR6H-67-010H
$1027.11 MSRP: $1403.43
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Product Specifications
- Other Name: Harness, Front
- Replaces: GR6H-67-010G, GR6H-67-010C, GR6H-67-010B, GR6H-67-010F, GR6H-67-010D, GR6H-67-010A, GR6H-67-010, GR6H-67-010E
Fits the following Mazda Models:
- 6 | 2003-2008 | S | 6 Cyl 3.0 L GAS
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Mazda Fuse & Relay Box Part Number: GHP9-66-730
$16.11 MSRP: $21.50
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Product Specifications
- Other Name: Block, Fuse
Fits the following Mazda Models:
- 6 | 2014-2021 | Carbon Edition, Grand Touring, Grand Touring Reserve, Signature, Sport, Touring | 4 Cyl 2.5 L GAS
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Mazda Fuse & Relay Box Part Number: GS1D-66-730
$15.40 MSRP: $20.54
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Product Specifications
- Other Name: Block, Fuse
Fits the following Mazda Models:
- 6 | 2009-2013 | i, S | 4 Cyl 2.5 L GAS, 6 Cyl 3.7 L GAS
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Mazda Relay Box Part Number: TK79-66-750A
$43.39 MSRP: $57.85
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Product Specifications
- Other Name: Block, Relay
Fits the following Mazda Models:
- CX-9 | 2016-2023 | Carbon Edition, Grand Touring, Signature, Sport, Touring, Touring Plus | 4 Cyl 2.5 L GAS
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Mazda Relay Box Part Number: EG23-66-750
$42.48 MSRP: $56.64
You Save: $14.16 (25%)
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Product Specifications
- Other Name: Box, Relay
- Replaces: EG21-66-750A
Fits the following Mazda Models:
- CX-7 | 2007-2012 | Grand Touring, Sport, SV, Touring | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS
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Mazda Relay Box Part Number: TE71-66-750
$43.99 MSRP: $58.66
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Product Specifications
- Other Name: Block, Relay
Fits the following Mazda Models:
- CX-9 | 2010-2015 | Grand Touring, Sport, Touring | 6 Cyl 3.7 L GAS
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Mazda Module Part Number: BDTS-67-5L0H
$84.43 MSRP: $112.58
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Product Specifications
- Other Name: Unit, Electric Supply-Driver; Module
- Position: Left
- Replaces: BDTS-67-5L0E, BDTS-67-5L0G, BDTS-67-5L0D
Fits the following Mazda Models:
- 3 | 2019-2024 | 2.0, Base, Preferred, Premium, Select, Select Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
- CX-30 | 2020-2023 | 2.5 S, 2.5 S Carbon Edition, 2.5 Turbo, Base, Preferred, Premium, Select | 4 Cyl 2.5 L GAS
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Mazda Module Part Number: BDTS-67-5M0H
$110.61 MSRP: $147.51
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Product Specifications
- Other Name: Unit, Electric Supply-Passenger; Module
- Position: Right
- Replaced by: DRVP-67-5M0A
- Replaces: BDTS-67-5M0G, BDTS-67-5M0E, BDTS-67-5M0D
Fits the following Mazda Models:
- 3 | 2019-2024 | 2.0, Base, Preferred, Premium, Select, Select Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
- CX-30 | 2020-2023 | 2.5 S, 2.5 S Carbon Edition, 2.5 Turbo, Base, Preferred, Premium, Select | 4 Cyl 2.5 L GAS
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Mazda Relay Box Part Number: TE70-66-750
$92.38 MSRP: $123.19
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Product Specifications
- Other Name: Block, Relay
Fits the following Mazda Models:
- CX-9 | 2010-2015 | Grand Touring, Sport, Touring | 6 Cyl 3.7 L GAS
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Mazda Relay Box Part Number: TD11-66-750
$16.78 MSRP: $128.93
You Save: $112.15 (87%)
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Product Specifications
- Other Name: Block, Relay
Fits the following Mazda Models:
- CX-9 | 2007-2009 | Grand Touring, Sport, Touring | 6 Cyl 3.5 L GAS, 6 Cyl 3.7 L GAS
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Mazda Module Part Number: BGBS-67-5Z0
$125.24 MSRP: $167.02
You Save: $41.78 (26%)
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Product Specifications
- Other Name: Electric Supply Unit; Module
- Replaces: DGJ4-67-5Z0
Fits the following Mazda Models:
- 3 | 2022-2024 | 2.0, Preferred, Premium, Select, Select Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
- CX-50 | 2023-2024 | 2.5 S, 2.5 Turbo | 4 Cyl 2.5 L GAS
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Mazda Fuse & Relay Box Part Number: BBM6-66-760
$122.08 MSRP: $162.80
You Save: $40.72 (26%)
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Product Specifications
- Other Name: Block, Main Fuse
Fits the following Mazda Models:
- 3 | 2011-2013 | i, Mazdaspeed, S | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS
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Mazda Fuse & Relay Box Part Number: GHP9-66-760
$144.68 MSRP: $192.93
You Save: $48.25 (26%)
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Product Specifications
- Other Name: Block, Main Fuse
Fits the following Mazda Models:
- 6 | 2014-2016 | Grand Touring, Sport, Touring | 4 Cyl 2.5 L GAS
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Mazda Module Part Number: BCKA-67-5M0F
$175.16 MSRP: $233.60
You Save: $58.44 (26%)
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Product Specifications
- Other Name: Unit, Electric Supply-Passenger; Module
- Position: Right
- Replaced by: BCKA-67-5M0G
- Replaces: BCKA-67-5M0C, BCKA-67-5M0D, BCKA-67-5M0E
Fits the following Mazda Models:
- 3 | 2019-2024 | 2.0, 2.5 Carbon Turbo, 2.5 S, 2.5 Turbo, 2.5 Turbo Premium Plus, Base, Carbon Edition, Preferred, Premium, Select, Select Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda Fuse & Relay Box Part Number: TK48-66-760
$173.84 MSRP: $231.83
You Save: $57.99 (26%)
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Product Specifications
- Other Name: Block, Main Fuse
Fits the following Mazda Models:
- 6 | 2017-2021 | Carbon Edition, Grand Touring, Grand Touring Reserve, Signature, Sport, Touring | 4 Cyl 2.5 L GAS
- CX-9 | 2016-2023 | Carbon Edition, Grand Touring, Signature, Sport, Touring, Touring Plus | 4 Cyl 2.5 L GAS
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Mazda Module Part Number: BCKA-67-5L0G
$176.79 MSRP: $235.76
You Save: $58.97 (26%)
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Product Specifications
- Other Name: Unit, Electric Supply-Driver; Module
- Position: Left
- Replaces: BCKA-67-5L0F, BCKA-67-5L0E, BCKA-67-5L0D, BCKA-67-5L0C
Fits the following Mazda Models:
- 3 | 2019-2024 | 2.0, 2.5 Carbon Turbo, 2.5 S, 2.5 Turbo, 2.5 Turbo Premium Plus, Base, Carbon Edition, Preferred, Premium, Select, Select Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda Fuse & Relay Box Part Number: B62S-66-760
$197.70 MSRP: $263.65
You Save: $65.95 (26%)
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Product Specifications
- Other Name: Block, Main Fuse; Fuse & Relay Box
- Replaces: BHR1-66-760, BHR1-66-760A
Fits the following Mazda Models:
- 3 | 2014-2018 | Grand Touring, i Grand Touring, I Sport, i SV, I Touring, s Grand Touring, s Touring, Sport, Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda Fuse & Relay Box Part Number: BFD2-66-760
Product Specifications
- Other Name: Block, Main Fuse
Fits the following Mazda Models:
- 3 | 2013 | i, Mazdaspeed, S | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS
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Mazda Fuse & Relay Box Part Number: BBM5-66-760B
Product Specifications
- Other Name: Block, Main Fuse
- Replaces: BBM5-66-760A
Fits the following Mazda Models:
- 3 | 2010 | i, Mazdaspeed, S | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS

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Mazda Relay Boxes

Every part of the car is important. Your vehicle's performance will be compromised if something goes wrong with the Mazda Relay Box. Therefore, for your smooth driving and safety, you need regular checks and timely replacements. Whenever you need replacements, opt for genuine Mazda Relay Boxes. Because they meet the manufacturer's criteria, it guarantees that replacements fit perfectly. Thus, these make better choices for people who care about driving. Why should you shop at MazdaPartsNow.com? We sell genuine Mazda Relay Boxes. In our online catalog, there is a wide range of different parts. These are delivered directly from authorized Mazda dealers only so that customers can be sure of their security throughout any transaction while using our website. Furthermore, you can also quickly search for OEM parts you want because of our user-friendly site navigation. Choose us for a genuine Mazda Relay Box that keeps your car running like new.

Mazda Relay Boxes Parts and Q&A

Fuse & Relay Box
BBM6-66-760
Q: What role do Relay Boxes play in the operation of electrical accessories on Mazda 3?
A:
Several electrical accessories in the vehicle, such as the fuel injection system, horns, starter, and fog lamps, use relays to transmit the electrical signal to the component. Relays operate by using a low-current circuit to open and close a high-current circuit. If a relay is defective, the associated component will not function properly. Most relays are typically mounted in the engine compartment and interior fuse or relay boxes.
Fuse & Relay Box
GP9B-66-730A
Q: What role do Relay Boxes play in the operation of electrical accessories on Mazda 6?
A:
The vehicle has several electrical accessories which use relays to pass the electrical signal to the component like the fuel injection system, horns, starter and fog lamps. Relays are used to open and close a high current circuit (the power circuit) using a low current circuit (the control circuit). In the case of faulty relay, the part will not work correctly. A majority of the relays are located in the engine compartment and interior fuse relays.