What is the purpose of relays on Nissan Frontier's electrical system?

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 use a low-current circuit (the control circuit) to open and close a high-current circuit (the power circuit). If the relay is defective, that component will not operate properly. Most relays are mounted in the engine compartment fuse/relay boxes, with some specialized relays located above the interior fuse box. The covers of the engine compartment relay boxes have a printed key to identify the relays. There are also several relays located above the interior fuse box. If a faulty relay is suspected, it can be removed and tested using the procedure below or by a dealer service department or a repair shop. Defective relays must be replaced as a unit. If you can't determine the correct connection from the wiring diagrams, however, you may be able to determine the test connections from the information that follows. There are six basic types of relays used on these models. Some are normally open type and some normally closed, while others include a circuit of each type. On most relays, two of the terminals are the relay control circuit. The other terminals are the power circuit. Some relays may be marked as an aid to help you determine which terminals are the control circuit and which are the power circuit. To test a relay connect an ohmmeter across the two terminals of the power circuit, continuity should not be indicated. Now connect a fused jumper wire between one of the two control circuit terminals and the positive battery terminal. Connect another jumper wire between the other control circuit terminal and ground. When the connections are made, the relay should click and continuity should be indicated on the meter. On some relays, polarity may be critical, so, if the relay doesn't click, try swapping the jumper wires on the control circuit terminals. If the relay fails the above test, replace it.

Genuine Nissan Frontier Relay

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48 Relays found

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Nissan Frontier Trailer Tow Harness Relay - Required for Trailer Tow Harness 999T8-XZ000
Part Number: 25230-79917
$8.38 MSRP: $12.60
You Save: $4.22 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Relay-Light; Horn Relay, Power Relay, Relay, Window Relay
- Replaces: 25230-79965, 25230-79944, 25230-79945, 25320-79915, 25230-79915
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2002-2025 Nissan Frontier | Base, Desert Runner, Hardbody Edition, LE, Nismo Off-Road, Off-Road, PRO-4X, PRO-X, S, SC, SE, SL, SV, SVE, XE | 4 Cyl 2.4 L GAS, 4 Cyl 2.4L, 4 Cyl 2.5 L GAS, 4 Cyl 2.5L, 6 Cyl 3.3 L GAS, 6 Cyl 3.3L, 6 Cyl 3.8 L GAS, 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 6 Cyl 4.0L | KA24DE, QR25DE, VG33E, VQ40DE
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Nissan Frontier Relay
Part Number: 25230-79915
$8.38 MSRP: $12.60
You Save: $4.22 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Relay-Starter
- Replaced by: 25230-79917
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2002-2004 Nissan Frontier | SC, SE, XE | 4 Cyl 2.4L, 6 Cyl 3.3L | KA24DE, VG33E
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Nissan Frontier Relay
Part Number: 25230-9B900
$22.97 MSRP: $34.55
You Save: $11.58 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Relay-EGI
- Replaced by: 25230-79981
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1998-2004 Nissan Frontier | SC, SE, STD, XE | 4 Cyl 2.4L, 6 Cyl 3.3L | KA24DE, VG33E
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Nissan Frontier Relay-Horn
Part Number: 25630-79960
$18.08 MSRP: $28.56
You Save: $10.48 (37%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Horn Relay, Relay
- Replaces: 26320-C9960, 25630-C9962, 26320-C9961, 26320-C9970, 25630-C9961, 25630-C9960
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1998-2025 Nissan Frontier | Base, Desert Runner, Hardbody Edition, LE, Nismo Off-Road, Off-Road, PRO-4X, PRO-X, S, SC, SE, SL, STD, SV, SVE, XE | 4 Cyl 2.4 L GAS, 4 Cyl 2.4L, 4 Cyl 2.5 L GAS, 4 Cyl 2.5L, 6 Cyl 3.3 L GAS, 6 Cyl 3.3L, 6 Cyl 3.8 L GAS, 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 6 Cyl 4.0L | KA24DE, QR25DE, VG33E, VQ40DE
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Nissan Frontier Relay
Part Number: 25230-79918
$33.78 MSRP: $50.80
You Save: $17.02 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Relay-Ignition
- Replaces: 25230-79966, 25230-79916
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2005-2019 Nissan Frontier | Off-Road, PRO-4X, S, SE, SL, SV | 4 Cyl 2.5L, 6 Cyl 4.0L | QR25DE, VQ40DE
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Nissan Frontier Relay
Part Number: 25230-7996A
$29.62 MSRP: $44.55
You Save: $14.93 (34%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Relay-Light
- Position: Passenger Side
- Replaces: 25230-C9963, 25230-79964, 25230-C9973, 25230-79963
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1998-2025 Nissan Frontier | Base, Desert Runner, Hardbody Edition, LE, Nismo Off-Road, Off-Road, PRO-4X, PRO-X, S, SC, SE, SL, SV, SVE, XE | 4 Cyl 2.4 L GAS, 4 Cyl 2.4L, 4 Cyl 2.5 L GAS, 4 Cyl 2.5L, 6 Cyl 3.3 L GAS, 6 Cyl 3.3L, 6 Cyl 3.8 L GAS, 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 6 Cyl 4.0L | KA24DE, QR25DE, VG33E, VQ40DE
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Nissan Frontier Relay
Part Number: 25230-79964
$29.62 MSRP: $44.55
You Save: $14.93 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 25230-7996A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1998-2004 Nissan Frontier | SC, SE, XE | 4 Cyl 2.4L, 6 Cyl 3.3L | KA24DE, VG33E
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Nissan Frontier Relay
Part Number: 25230-9B905
$34.23 MSRP: $51.47
You Save: $17.24 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Relay-Antiskid
- Replaced by: 25230-79982
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1998-2010 Nissan Frontier | LE, Off-Road, SC, SE, SL, SV, XE | 4 Cyl 2.4L, 6 Cyl 3.3L, 6 Cyl 4.0L | KA24DE, VG33E, VQ40DE
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Nissan Frontier Relay
Part Number: 25230-79982
$34.23 MSRP: $51.47
You Save: $17.24 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Relay-Antiskid; Intermittent Relay
- Replaces: 25230-79972, 25230-79962, 25230-9B905
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1998-2019 Nissan Frontier | LE, Off-Road, PRO-4X, S, SC, SE, SL, SV, XE | 4 Cyl 2.4L, 6 Cyl 3.3L, 6 Cyl 4.0L | KA24DE, VG33E, VQ40DE
View related parts
Nissan Frontier Relay
Part Number: 25230-C9963
$29.62 MSRP: $44.55
You Save: $14.93 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaced by: 25230-7996A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1998-1999 Nissan Frontier | SE, XE | 4 Cyl 2.4L | KA24DE
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Nissan Frontier Relay
Part Number: 25230-79963
$29.62 MSRP: $44.55
You Save: $14.93 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Relay-Light
- Replaced by: 25230-7996A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2005-2008 Nissan Frontier | LE, Off-Road, SE, XE | 4 Cyl 2.5L, 6 Cyl 4.0L | QR25DE, VQ40DE
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Nissan Frontier Harness Assembly-EGI
Part Number: 24011-EA270
$594.84 MSRP: $916.55
You Save: $321.71 (36%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Harness-EGI; Engine Harness
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2005-2007 Nissan Frontier | LE, Off-Road, SE | 6 Cyl 4.0L | VQ40DE
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Nissan Frontier Harness Assembly-EGI
Part Number: 24011-ZP90B
$568.55 MSRP: $876.04
You Save: $307.49 (36%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Harness-EGI; Engine Harness
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2006-2011 Nissan Frontier | LE, Off-Road, SE, SL, SV | 6 Cyl 4.0L | VQ40DE
View related parts
Nissan Frontier Relay
Part Number: 25230-79945
$8.38 MSRP: $12.60
You Save: $4.22 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 25230-79917
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2002-2004 Nissan Frontier | SC, SE, XE | 4 Cyl 2.4L, 6 Cyl 3.3L | KA24DE, VG33E
View related parts
Nissan Frontier Harness Assembly-EGI
Part Number: 24011-EA271
$665.83 MSRP: $1025.93
You Save: $360.10 (36%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Harness-EGI; Engine Harness
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2005-2007 Nissan Frontier | LE, Off-Road, SE | 6 Cyl 4.0L | VQ40DE
View related parts
Nissan Frontier Harness Assembly-EGI
Part Number: 24011-9BA0B
$522.94 MSRP: $785.78
You Save: $262.84 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Harness-EGI. This item is non-returnable.; Engine Harness
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2010-2013 Nissan Frontier | LE, Off-Road, PRO-4X, S, SE, SL, SV | 6 Cyl 4.0L | VQ40DE
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Nissan Frontier EGI Harness
Part Number: 24011-9BP6B
$387.97 MSRP: $597.80
You Save: $209.83 (36%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Harness-EGI; Engine Harness
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2017-2019 Nissan Frontier | S, SV | 4 Cyl 2.5L | QR25DE
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Nissan Frontier Harness Assembly-EGI
Part Number: 24011-9BA5B
$398.55 MSRP: $614.09
You Save: $215.54 (36%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Harness-EGI; Engine Harness
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2010-2013 Nissan Frontier | LE, Off-Road, PRO-4X, S, SE, SL, SV | 6 Cyl 4.0L | VQ40DE
View related parts
Nissan Frontier Harness Assembly-EGI
Part Number: 24011-9BS5B
$398.59 MSRP: $614.16
You Save: $215.57 (36%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Engine Harness
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2018-2019 Nissan Frontier | PRO-4X, S, SL, SV | 6 Cyl 4.0L | VQ40DE
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Nissan Frontier EGI Harness
Part Number: 24011-9BL5B
$441.27 MSRP: $679.93
You Save: $238.66 (36%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Harness-EGI; Engine Harness
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2014-2019 Nissan Frontier | PRO-4X, S, SL, SV | 6 Cyl 4.0L | VQ40DE

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1-20 of 48 Results

Nissan Frontier Relay

Nissan Frontier Relay delivers consistent control to the truck's climate components by acting as a small electrical gate that lets a low power signal govern higher draw parts such as the fan or blower motor. This Relay responds to input from sensors and switches, snapping its contacts closed or open so the compressor clutch, interior fan, or cooling fan runs only when commanded, which prevents wasted energy and shields pricey hardware. Across modern Nissan trucks, within the Frontier lineup, two Relay styles have appeared, the traditional electromechanical type with a compact coil and moving armature, and a modern solid state version that relies on semiconductors with no moving pieces. The solid state design reacts quicker, shrugs off vibration, and runs cooler, whereas the coil driven unit is easier to diagnose and costs less. Each Nissan maintains several switching units in the HVAC chain, and when a Relay fails the associated part simply quits, so checking this inexpensive switch comes before swapping major components. Every Frontier depends on accurate sensor data so the chosen Relay can keep cabin conditions comfortable and warning lights silent.

If you need any OEM Nissan Frontier Relay, feel free to choose them out of our huge selection of genuine Nissan Frontier Relay. All our parts are offered at unbeatable prices and are supported by the manufacturer's warranty. In addition, we offer quick shipping to have your parts delivered to your door step in a matter of days.

Nissan Frontier Relay Parts Questions & Experts Answers

Relay
25230-9B900
Q: What is the purpose of relays on Nissan Frontier's electrical system?
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 use a low-current circuit (the control circuit) to open and close a high-current circuit (the power circuit). If the relay is defective, that component will not operate properly. Most relays are mounted in the engine compartment fuse/relay boxes, with some specialized relays located above the interior fuse box. The covers of the engine compartment relay boxes have a printed key to identify the relays. There are also several relays located above the interior fuse box. If a faulty relay is suspected, it can be removed and tested using the procedure below or by a dealer service department or a repair shop. Defective relays must be replaced as a unit. If you can't determine the correct connection from the wiring diagrams, however, you may be able to determine the test connections from the information that follows. There are six basic types of relays used on these models. Some are normally open type and some normally closed, while others include a circuit of each type. On most relays, two of the terminals are the relay control circuit. The other terminals are the power circuit. Some relays may be marked as an aid to help you determine which terminals are the control circuit and which are the power circuit. To test a relay connect an ohmmeter across the two terminals of the power circuit, continuity should not be indicated. Now connect a fused jumper wire between one of the two control circuit terminals and the positive battery terminal. Connect another jumper wire between the other control circuit terminal and ground. When the connections are made, the relay should click and continuity should be indicated on the meter. On some relays, polarity may be critical, so, if the relay doesn't click, try swapping the jumper wires on the control circuit terminals. If the relay fails the above test, replace it.