What role do relays play in the operation of electrical accessories on Honda Civic?

In the vehicle, there are a number of electrical accessories that include, the fuel injection system, horns, starter, and fog lamps that employ relay to transfer electrical signals to the gadgets. A relay employs a low current control circuit which when activated switches on or off a high current power circuit. A defective relay will cause the associated component to function in an unexpected manner. Almost all relays are usually installed in regions like the engine bay and interior fuse/relay boxes.

Genuine Honda Civic Relay

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56 Relays found

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Honda Civic Relay Assembly, Power (Micro Iso) (Omron)
Part Number: 39794-SDA-A03
- Other Name: Blower Motor Relay; Fuel Pump Relay, Horn Relay, Relay
$21.26 MSRP: $30.03
You Save: $8.77 (30%)

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Fits the following Vehicles:
2006-2021 Honda Civic | 2 Door DX, 2 Door EX, 2 Door EX (Turbo), 2 Door EX (Turbo/6MT), 2 Door EX (Turbo/CVT), 2 Door EX-L, 2 Door LX, 2 Door LX (6MT), 2 Door LX (CVT), 2 Door SI, 2 Door Sport, 2 Door Sport (6MT), 2 Door Sport (CVT), 2 Door Touring, 2 Door Touring (Turbo), 4 Door DX, 4 Door EX, 4 Door EX (Turbo), 4 Door EX-A, 4 Door EX-L, 4 Door EX-T, 4 Door EX-TA, 4 Door EX-TL, 4 Door EX-TLA, 4 Door GX, 4 Door HF, 4 Door LX, 4 Door LX (6MT), 4 Door LX (AT), 4 Door LX (CVT), 4 Door LX-A, 4 Door LX-S, 4 Door MX, 4 Door MX (Hybrid), 4 Door SE, 4 Door SI, 4 Door Sport, 4 Door Sport (6MT), 4 Door Sport (CVT), 4 Door Touring, 4 Door Touring (Turbo), 5 Door LX, 5 Door SE, 5 Door Sport | KA 5AT, KA 5MT, KA 6MT, KA CVT, KL 5AT, KL CVT
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Honda Civic Relay Assembly, Power (Micro Iso) (Mitsuba)
Part Number: 39794-SDA-A05
- Other Name: Horn Relay; Relay
- Replaces: 39794-SDA-A01, 39794-SDA-A04, 39794-SDA-A03
$21.08 MSRP: $30.03
You Save: $8.95 (30%)

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Fits the following Vehicles:
2018 Honda Civic | 4 Door EX, 4 Door EX (Turbo), 4 Door Touring (Turbo) | KA CVT, KL CVT
2006-2015 Honda Civic | 2 Door DX, 2 Door EX, 2 Door EX-L, 2 Door LX, 2 Door SI, 4 Door DX, 4 Door EX, 4 Door EX-L, 4 Door GX, 4 Door HF, 4 Door LX, 4 Door LX (AT), 4 Door LX-S, 4 Door MX, 4 Door MX (Hybrid), 4 Door SI | KA 5AT, KA 5MT, KA 6MT, KA CVT, KL 5AT, KL CVT
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Honda Civic Relay Assembly, Engine Control Module (Denso)
Part Number: 39794-SDA-902
- Other Name: Ecm Relay; Relay
- Replaces: 39794-SDA-901
$50.08 MSRP: $71.34
You Save: $21.26 (30%)

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Fits the following Vehicles:
2006-2015 Honda Civic | 2 Door DX, 2 Door EX, 2 Door EX-L, 2 Door LX, 2 Door SI, 4 Door DX, 4 Door EX, 4 Door EX-L, 4 Door GX, 4 Door HF, 4 Door LX, 4 Door LX (AT), 4 Door LX-S, 4 Door MX, 4 Door MX (Hybrid), 4 Door SI | KA 5AT, KA 5MT, KA 6MT, KA CVT, KL 5AT, KL CVT
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Honda Civic Relay Assembly, Fuel Pump (Denso)
Part Number: 39794-SDA-004
- Other Name: Fuel Pump Relay; Relay
- Replaces: 39794-SDA-305, 39794-SDA-003
$46.93 MSRP: $66.28
You Save: $19.35 (30%)

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Fits the following Vehicles:
2006-2021 Honda Civic | 2 Door DX, 2 Door EX, 2 Door EX (Turbo), 2 Door EX (Turbo/6MT), 2 Door EX (Turbo/CVT), 2 Door EX-L, 2 Door LX, 2 Door LX (6MT), 2 Door LX (CVT), 2 Door SI, 2 Door Sport, 2 Door Sport (6MT), 2 Door Sport (CVT), 2 Door Touring, 2 Door Touring (Turbo), 4 Door DX, 4 Door EX, 4 Door EX (Turbo), 4 Door EX-A, 4 Door EX-L, 4 Door EX-T, 4 Door EX-TA, 4 Door EX-TL, 4 Door EX-TLA, 4 Door GX, 4 Door HF, 4 Door LX, 4 Door LX (6MT), 4 Door LX (AT), 4 Door LX (CVT), 4 Door LX-A, 4 Door LX-S, 4 Door MX, 4 Door MX (Hybrid), 4 Door SE, 4 Door SI, 4 Door Sport, 4 Door Sport (6MT), 4 Door Sport (CVT), 4 Door Touring, 4 Door Touring (Turbo), 5 Door EX, 5 Door EX-L, 5 Door LX, 5 Door SE, 5 Door Sport, 5 Door Touring LE, 5 Door Type R, 5 Door Type R (Touring) | KA 5AT, KA 5MT, KA 6MT, KA CVT, KL 5AT, KL CVT
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Honda Civic Relay Assembly, Power (5P) (Micro Iso) (Mitsuba)
Part Number: 39794-S10-003
- Other Name: Relay
$36.76 MSRP: $51.92
You Save: $15.16 (30%)

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Fits the following Vehicles:
1998-2021 Honda Civic | 2 Door DX, 2 Door EX, 2 Door EX (Turbo), 2 Door EX-L, 2 Door HX, 2 Door LX, 2 Door LX (CVT), 2 Door SI, 2 Door Sport, 2 Door Sport (6MT), 2 Door Sport (CVT), 2 Door Touring, 2 Door Touring (Turbo), 3 Door SI, 4 Door DX, 4 Door EX, 4 Door EX (Turbo), 4 Door EX-L, 4 Door GX, 4 Door HF, 4 Door LX, 4 Door LX (6MT), 4 Door LX (AT), 4 Door LX (CVT), 4 Door LX-S, 4 Door MX, 4 Door MX (Hybrid), 4 Door SE, 4 Door SI, 4 Door Sport, 4 Door Sport (6MT), 4 Door Sport (CVT), 4 Door Touring, 4 Door Touring (Turbo), 5 Door EX, 5 Door EX-L, 5 Door LX, 5 Door SE, 5 Door Sport, 5 Door Touring LE, 5 Door Type R, 5 Door Type R (Touring) | KA 4AT, KA 5AT, KA 5MT, KA 6MT, KA CVT, KL 4AT, KL 5AT, KL 5MT, KL CVT, KW 5MT
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Honda Civic Relay Assembly, Power (Micro Iso) (Denso)
Part Number: 39794-SDA-A02
- Other Name: Relay
$23.55 MSRP: $33.54
You Save: $9.99 (30%)

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Fits the following Vehicles:
2018-2020 Honda Civic | 4 Door EX, 4 Door EX (Turbo), 4 Door Touring (Turbo) | KA CVT, KL CVT
2006-2012 Honda Civic | 2 Door DX, 2 Door EX, 2 Door EX-L, 2 Door LX, 2 Door SI, 4 Door DX, 4 Door EX, 4 Door EX-L, 4 Door HF, 4 Door LX, 4 Door LX (AT), 4 Door LX-S, 4 Door MX (Hybrid), 4 Door SI | KA 5AT, KA 5MT, KA 6MT, KA CVT, KL 5AT, KL CVT
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Honda Civic Relay Assembly (Micro Iso)
Part Number: 39792-SDA-A01
- Other Name: Blower Motor Relay; Relay
$8.19 MSRP: $11.57
You Save: $3.38 (30%)

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Fits the following Vehicles:
2016-2021 Honda Civic | 2 Door EX, 2 Door EX (Turbo), 2 Door EX (Turbo/6MT), 2 Door EX (Turbo/CVT), 2 Door LX, 2 Door LX (6MT), 2 Door LX (CVT), 2 Door SI, 2 Door Sport, 2 Door Sport (6MT), 2 Door Sport (CVT), 2 Door Touring, 2 Door Touring (Turbo), 4 Door EX, 4 Door EX (Turbo), 4 Door EX-A, 4 Door EX-T, 4 Door EX-TA, 4 Door EX-TL, 4 Door EX-TLA, 4 Door LX, 4 Door LX (6MT), 4 Door LX (CVT), 4 Door LX-A, 4 Door SE, 4 Door SI, 4 Door Sport, 4 Door Sport (6MT), 4 Door Sport (CVT), 4 Door Touring, 4 Door Touring (Turbo), 5 Door EX, 5 Door EX-L, 5 Door LX, 5 Door SE, 5 Door Sport, 5 Door Touring LE, 5 Door Type R, 5 Door Type R (Touring) | KA 6MT, KA CVT, KL CVT
2006-2011 Honda Civic | 2 Door DX, 2 Door EX, 2 Door EX-L, 2 Door LX, 2 Door SI, 4 Door DX, 4 Door EX, 4 Door EX-L, 4 Door GX, 4 Door LX, 4 Door LX-S, 4 Door MX (Hybrid), 4 Door SI | KA 5AT, KA 5MT, KA 6MT, KA CVT
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Honda Civic Relay Assembly, Main
Part Number: 39400-S10-003
- Other Name: Main Relay; Relay
- Replaces: 39400-SR3-003
$96.44 MSRP: $136.22
You Save: $39.78 (30%)

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Fits the following Vehicles:
1992-2000 Honda Civic | 2 Door DX, 2 Door EX, 2 Door EX-S, 2 Door HX, 3 Door CX, 3 Door DX, 3 Door SI, 3 Door VX, 4 Door DX, 4 Door EX, 4 Door LX | KA 4AT, KA 5MT, KA CVT, KL 4AT, KL 5MT, KL CVT, KR 5MT, KW 5MT
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Honda Civic Relay Assembly, Fuel Pump (5P) (Mitsuba)
Part Number: 39794-S5A-003
- Replaces: 39794-S5A-004
$33.68 MSRP: $47.56
You Save: $13.88 (30%)

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Fits the following Vehicles:
2001-2005 Honda Civic | 2 Door DX, 2 Door EX, 2 Door HX, 2 Door LX, 3 Door SI, 4 Door DX, 4 Door DX-VP, 4 Door EX, 4 Door GX, 4 Door LX, 4 Door LX-CAR, 4 Door MX (Hybrid) | KA 4AT, KA 5MT, KA CVT, KL 4AT, KL 5MT, KL CVT
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Honda Civic Relay Assembly, Engine Control Module (4P) (Mitsuba)
Part Number: 39794-S5A-901
- Replaces: 39794-S5A-902
$34.36 MSRP: $48.54
You Save: $14.18 (30%)

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Fits the following Vehicles:
2001-2005 Honda Civic | 2 Door DX, 2 Door EX, 2 Door HX, 2 Door LX, 3 Door SI, 4 Door DX, 4 Door DX-VP, 4 Door EX, 4 Door GX, 4 Door LX, 4 Door LX-CAR, 4 Door MX (Hybrid) | KA 4AT, KA 5MT, KA CVT, KL 4AT, KL 5MT, KL CVT
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Honda Civic Relay Assembly, Power (Micro Iso) (Denso)
Part Number: 39794-T5A-J01
- Other Name: Relay
$29.48 MSRP: $41.63
You Save: $12.15 (30%)

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Fits the following Vehicles:
2016-2021 Honda Civic | 2 Door EX, 2 Door EX (Turbo), 2 Door EX (Turbo/6MT), 2 Door EX (Turbo/CVT), 2 Door LX, 2 Door LX (6MT), 2 Door LX (CVT), 2 Door SI, 2 Door Sport, 2 Door Sport (6MT), 2 Door Sport (CVT), 2 Door Touring, 2 Door Touring (Turbo), 4 Door EX, 4 Door EX (Turbo), 4 Door EX-A, 4 Door EX-T, 4 Door EX-TA, 4 Door EX-TL, 4 Door EX-TLA, 4 Door LX, 4 Door LX (6MT), 4 Door LX (CVT), 4 Door LX-A, 4 Door SE, 4 Door SI, 4 Door Sport, 4 Door Sport (6MT), 4 Door Sport (CVT), 4 Door Touring, 4 Door Touring (Turbo), 5 Door EX, 5 Door EX-L, 5 Door LX, 5 Door SE, 5 Door Sport, 5 Door Touring LE, 5 Door Type R, 5 Door Type R (Touring) | KA 6MT, KA CVT, KL CVT
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Honda Civic Relay Assembly, Power (4P) (Rc-2201) (Mitsuba)
Part Number: 39795-SB2-003
- Other Name: Power Relay; Relay
$69.54 MSRP: $98.21
You Save: $28.67 (30%)

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Fits the following Vehicles:
1986-1995 Honda Civic | 2 Door DX, 2 Door EX, 2 Door EX-S, 3 Door (1300), 3 Door CX, 3 Door DX, 3 Door SI, 3 Door STD, 3 Door VX, 4 Door DX, 4 Door EX, 4 Door GL, 4 Door LX, 5 Door (Wagovan), 5 Door 4WD, 5 Door DX, 5 Door WV | KA 4AT, KA 4MT, KA 5MT, KH 4MT, KL 4AT, KL 4MT, KL 5MT
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Honda Civic Relay Assembly, Power (4P) (Micro Iso) (Matsushita)
Part Number: 39794-S04-014
- Replaces: 39794-S04-004
$37.85 MSRP: $53.47
You Save: $15.62 (30%)

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Fits the following Vehicles:
1996-2005 Honda Civic | 2 Door DX, 2 Door HX, 3 Door CX, 3 Door DX, 3 Door SI, 4 Door DX, 4 Door DX-VP, 4 Door EX, 4 Door GX, 4 Door LX, 4 Door MX (Hybrid) | KA 4AT, KA 5MT, KA CVT, KL 4AT, KL 5MT, KL CVT, KR 5MT, KW 5MT
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Honda Civic Relay Assembly, Power (Micro Iso) (Omron)
Part Number: 39792-SJC-A01
$7.09 MSRP: $10.02
You Save: $2.93 (30%)

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Fits the following Vehicles:
2008-2015 Honda Civic | 2 Door DX, 2 Door EX, 2 Door EX-L, 2 Door LX, 2 Door SI, 4 Door DX, 4 Door EX, 4 Door EX-L, 4 Door GX, 4 Door HF, 4 Door LX, 4 Door LX (AT), 4 Door LX-S, 4 Door MX, 4 Door MX (Hybrid), 4 Door SI | KA 5AT, KA 5MT, KA 6MT, KA CVT, KL 5AT, KL CVT
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Honda Civic Relay Assembly, Turn Signal And Hazard (Omron)
Part Number: 38300-S5P-A01
- Other Name: Flasher
$56.65 MSRP: $80.02
You Save: $23.37 (30%)

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Fits the following Vehicles:
2001-2005 Honda Civic | 2 Door DX, 2 Door EX, 2 Door HX, 2 Door LX, 3 Door SI | KA 4AT, KA 5MT, KA CVT, KL 4AT, KL 5MT, KL CVT
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Honda Civic Relay Assembly, Turn Signal And Hazard (Mitsuba)
Part Number: 38300-S9A-003
- Other Name: Turn Signal Flasher
- Replaces: 38300-S9V-A11, 38300-S9V-A01, 38300-SV1-A01, 38300-SA5-003, 38300-SB2-671, 38300-SE3-004, 38300-SE3-003, 38300-SE3-013, 38300-S47-013, 38300-SA5-004, 38300-SB2-672, 38300-S5T-004, 38300-SA5-671, 38300-SV1-A00, 38300-SA5-013, 38300-SA5-672, 38300-S5T-003, 38300-S5A-003, 38300-SV1-A11
$62.32 MSRP: $90.32
You Save: $28.00 (32%)

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Fits the following Vehicles:
1982-2005 Honda Civic | 2 Door DX, 2 Door EX, 2 Door EX-S, 2 Door HX, 2 Door LX, 2 Door SI, 3 Door (1300), 3 Door CX, 3 Door DX, 3 Door FE (1300), 3 Door GL (1500), 3 Door S, 3 Door SI, 3 Door STD, 3 Door VX, 4 Door (1500), 4 Door DX, 4 Door DX-VP, 4 Door EX, 4 Door GL, 4 Door GX, 4 Door LX, 4 Door LX-CAR, 4 Door MX (Hybrid), 5 Door (Wagovan), 5 Door **, 5 Door 4WD, 5 Door DX, 5 Door WV | KA 3AT, KA 4AT, KA 4MT, KA 5MT, KA CVT, KA HMT, KH 4MT, KH 5MT, KH HMT, KL 3AT, KL 4AT, KL 4MT, KL 5MT, KL CVT, KL HMT, KR 5MT, KW 5MT
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Honda Civic Relay Assembly, Main (Rz-0063) (Pgm-Fi) (Mitsuba)
Part Number: 39400-SH3-003
- Other Name: Main Relay
- Replaces: 39400-SK7-003, 39400-SD4-003
$102.57 MSRP: $144.87
You Save: $42.30 (30%)

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Fits the following Vehicles:
1988-1991 Honda Civic | 3 Door DX, 3 Door SI, 3 Door STD, 4 Door DX, 4 Door EX, 4 Door LX, 5 Door (Wagovan), 5 Door 4WD, 5 Door DX | KA 4AT, KA 4MT, KA 5MT, KL 4AT, KL 4MT, KL 5MT
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Honda Civic Relay Assembly, Power (4P) (Rc-2226) (Brown) (Mitsuba)
Part Number: 39794-SL0-J01
- Other Name: Relay
- Replaces: 39794-SE0-004, 39794-SL0-004, 39794-SE0-003
$68.29 MSRP: $96.45
You Save: $28.16 (30%)

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More Info
Fits the following Vehicles:
1988-2005 Honda Civic | 2 Door DX, 2 Door EX, 2 Door EX-S, 2 Door HX, 2 Door LX, 2 Door SI, 3 Door CX, 3 Door DX, 3 Door SI, 3 Door STD, 3 Door VX, 4 Door DX, 4 Door DX-VP, 4 Door EX, 4 Door GX, 4 Door LX, 4 Door LX-CAR, 4 Door MX (Hybrid), 5 Door (Wagovan), 5 Door 4WD, 5 Door DX | KA 4AT, KA 4MT, KA 5MT, KA CVT, KL 4AT, KL 4MT, KL 5MT, KL CVT, KR 5MT, KW 5MT
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Honda Civic Relay Assembly, Power (4P) (056700-7250) (Denso)
Part Number: 39794-SE0-003
- Replaced by: 39794-SL0-J01
$66.55 MSRP: $96.45
You Save: $29.90 (32%)

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Fits the following Vehicles:
1988-2005 Honda Civic | 2 Door DX, 2 Door EX, 2 Door EX-S, 2 Door HX, 2 Door LX, 2 Door SI, 3 Door CX, 3 Door DX, 3 Door SI, 3 Door STD, 3 Door VX, 4 Door DX, 4 Door DX-VP, 4 Door EX, 4 Door GX, 4 Door LX, 4 Door LX-CAR, 4 Door MX (Hybrid), 5 Door (Wagovan), 5 Door 4WD, 5 Door DX | KA 4AT, KA 4MT, KA 5MT, KA CVT, KL 4AT, KL 4MT, KL 5MT, KL CVT, KR 5MT, KW 5MT
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Honda Civic Relay Assembly, Power (Micro Iso)
Part Number: 39794-TBA-A01
- Other Name: Relay
$3.72 MSRP: $5.24
You Save: $1.52 (30%)

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More Info
Fits the following Vehicles:
2016-2021 Honda Civic | 2 Door EX, 2 Door LX, 2 Door LX (CVT), 2 Door SI, 2 Door Sport, 2 Door Sport (6MT), 2 Door Sport (CVT), 2 Door Touring, 4 Door EX, 4 Door EX (Turbo), 4 Door EX-A, 4 Door EX-T, 4 Door EX-TA, 4 Door EX-TL, 4 Door EX-TLA, 4 Door LX, 4 Door LX (6MT), 4 Door LX (CVT), 4 Door LX-A, 4 Door SE, 4 Door SI, 4 Door Sport, 4 Door Sport (6MT), 4 Door Sport (CVT), 4 Door Touring, 4 Door Touring (Turbo), 5 Door EX, 5 Door EX-L, 5 Door LX, 5 Door SE, 5 Door Sport, 5 Door Touring LE, 5 Door Type R, 5 Door Type R (Touring) | KA 6MT, KA CVT, KL CVT
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Honda Civic Relay Parts Questions & Answers

Relay Assembly, Power (5P) (Micro Iso)
39794-SNB-E01
Q: What role do relays play in the operation of electrical accessories on Honda Civic?
A: In the vehicle, there are a number of electrical accessories that include, the fuel injection system, Horns, starter, and fog lamps that employ relay to transfer electrical signals to the gadgets. A relay employs a low current control circuit which when activated switches on or off a high current power circuit. A defective relay will cause the associated component to function in an unexpected manner. Almost all relays are usually installed in regions like the engine bay and interior fuse/relay boxes.