How do relays work in electrical system, and how can I test and diagnose relay-related issues on 1997 through 2001 Toyota Avalon?

Various electrical accessories within the vehicle, such as the fuel injection system, horns, starter, air conditioning/heating system, and fog lights, utilize relays to transmit electrical signals to the respective components. Relays function by utilizing a low-current control circuit to open and close a high-current power circuit. A defective relay can result in improper component operation. These relays are typically situated in engine compartment fuse/relay boxes. In case of suspected relay malfunction, they can be removed and tested. Faulty relays need to be replaced as a complete unit. To test relays, usually marked for identification, it's important to recognize the control circuit terminals (connected to the relay coil) and the power circuit terminals (connected when the control circuit coil is energized). Fused jumper wires are used to connect the control circuit terminals to the positive battery terminal and the ground. A functional relay should click with these connections. Continuity checks are then performed between the power circuit terminals, following the relay markings. If any of the tests fail, the relay should be replaced.

Genuine Toyota Avalon Relay

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63 Relays found

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Toyota Avalon Relay
Part Number: 90080-87026
$22.24 MSRP: $31.09
You Save: $8.85 (29%)
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Product Specifications
- Other Name: Relay, Fog Lamp; ECM Relay, Fan Relay, Horn Relay, Relay
- Replaces: 90080-87010, 90987-02027, 90987-T2001, 85915-12020
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2005-2022 Toyota Avalon | Limited, Touring, XL, XLE, XLE Premium, XLE Touring Or Touring, XLS, XSE | 4 Cyl 2.5L, 6 Cyl 3.5L | 2ARFXE, 2GRFE, 2GRFKS, A25AFKS, A25AFXS; AVX40L-AEXGBA, AVX40L-AEXPBA, AXXA55L-AEZGBA, AXXA55L-AEZPBA, AXXH50L-AEXGBA, AXXH50L-AEXPBA, AXXH50L-AEXQBA, AXXH51L-AEXGBA, AXXH51L-AEXPBA, AXXH51L-AEXQBA, GSX30L-AEAGKA, GSX30L-AEANKA, GSX30L-AEAPKA, GSX30L-AETGKA, GSX30L-AETNKA, GSX30L-AETPKA, GSX40L-AETGKA, GSX40L-AETPKA, GSX40L-AETQKA, GSX50L-AEZGBA, GSX50L-AEZPBA, GSX50L-AEZQBA, GSX50L-AEZSBA
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Toyota Avalon Relay Assembly
Part Number: 90987-02006
$38.57 MSRP: $53.91
You Save: $15.34 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Relay, Headlamp
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1995-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK, MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Relay
Part Number: 90987-02027
$22.24 MSRP: $31.09
You Save: $8.85 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Relay, Cooling Fan
- Replaced by: 90080-87026
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2013-2022 Toyota Avalon | Limited, Touring, XLE, XLE Premium, XLE Touring Or Touring, XSE | 4 Cyl 2.5L, 6 Cyl 3.5L | 2ARFXE, 2GRFE, 2GRFKS, A25AFKS, A25AFXS; AVX40L-AEXGBA, AVX40L-AEXPBA, AXXA55L-AEZGBA, AXXA55L-AEZPBA, AXXH50L-AEXGBA, AXXH50L-AEXPBA, AXXH50L-AEXQBA, AXXH51L-AEXGBA, AXXH51L-AEXPBA, AXXH51L-AEXQBA, GSX40L-AETGKA, GSX40L-AETPKA, GSX40L-AETQKA, GSX50L-AEZGBA, GSX50L-AEZPBA, GSX50L-AEZQBA, GSX50L-AEZSBA
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Toyota Avalon Relay Assy, Cooler
Part Number: 90987-02028
$79.51 MSRP: $112.08
You Save: $32.57 (30%)
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Product Specifications
- Other Name: Relay, Magnet-Clutch; Relay
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2005-2012 Toyota Avalon | Limited, XL, XLS | 6 Cyl 3.5L | 2GRFE; GSX30L-AEAGKA, GSX30L-AEANKA, GSX30L-AEAPKA, GSX30L-AETGKA, GSX30L-AETNKA, GSX30L-AETPKA
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Toyota Avalon Relay
Part Number: 90987-04002
$25.99 MSRP: $36.33
You Save: $10.34 (29%)
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Product Specifications
- Other Name: Relay Assy (For Heater Blower Motor)
- Position: Front
- Replaced by: 90987-04002-83
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1995-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK, MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Relay, Acc
Part Number: 90080-87024
$65.74 MSRP: $92.66
You Save: $26.92 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Relay, Headlamp
- Comment: (FOR EFI)
- Replaces: 90987-02025, 90987-T2002, 90987-02016
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2000-2022 Toyota Avalon | Limited, Touring, XL, XLE, XLE Premium, XLE Touring Or Touring, XLS, XSE | 4 Cyl 2.5L, 6 Cyl 3.0L, 6 Cyl 3.5L | 1MZFE; MCX20L-AEPGKA, 2ARFXE, 2GRFE, 2GRFKS, A25AFKS, A25AFXS; AVX40L-AEXGBA, AVX40L-AEXPBA, AXXA55L-AEZGBA, AXXA55L-AEZPBA, AXXH50L-AEXGBA, AXXH50L-AEXPBA, AXXH50L-AEXQBA, AXXH51L-AEXGBA, AXXH51L-AEXPBA, AXXH51L-AEXQBA, GSX30L-AEAGKA, GSX30L-AEANKA, GSX30L-AEAPKA, GSX30L-AETGKA, GSX30L-AETNKA, GSX30L-AETPKA, GSX40L-AETGKA, GSX40L-AETPKA, GSX40L-AETQKA, GSX50L-AEZGBA, GSX50L-AEZPBA, GSX50L-AEZQBA, GSX50L-AEZSBA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Relay, Acc
Part Number: 90084-98032
$56.16 MSRP: $78.50
You Save: $22.34 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Relay, Cooling Fan, NO.2; Fan Relay, Fuel Pump Relay, Relay, Relay Box Relay
- Comment: (AUTO DRIVE)
- Replaces: 90084-98026, 90080-87014, 90987-04004
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2013-2022 Toyota Avalon | Limited, Touring, XLE, XLE Premium, XLE Touring Or Touring, XSE | 4 Cyl 2.5L, 6 Cyl 3.5L | 2ARFXE, 2GRFE, 2GRFE; AVX40L-AEXGBA, 2GRFKS, A25AFKS, A25AFXS; AVX40L-AEXGBA, AVX40L-AEXPBA, AXXA55L-AEZGBA, AXXA55L-AEZPBA, AXXH50L-AEXGBA, AXXH50L-AEXPBA, AXXH50L-AEXQBA, AXXH51L-AEXGBA, AXXH51L-AEXPBA, AXXH51L-AEXQBA, GSX40L-AETGKA, GSX40L-AETPKA, GSX40L-AETQKA, GSX50L-AEZGBA, GSX50L-AEZPBA, GSX50L-AEZQBA, GSX50L-AEZSBA
- 1998-2011 Toyota Avalon | Limited, XL, XLS | 6 Cyl 3.0L, 6 Cyl 3.5L | 1MZFE, 1MZFE; MCX10L-AEPGKA, 2GRFE; GSX30L-AEAGKA, GSX30L-AEANKA, GSX30L-AEAPKA, GSX30L-AETGKA, GSX30L-AETNKA, GSX30L-AETPKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK, MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Relay
Part Number: 90987-02009
$46.49 MSRP: $64.99
You Save: $18.50 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Relay, Computer (For EFI)
- Replaces: 90084-98009, 90987-02010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1995-1999 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK
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Toyota Avalon Relay Assembly, Starter
Part Number: 28300-10020
$78.91 MSRP: $111.22
You Save: $32.31 (30%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Relay Assy, Starter; Relay, Relay Box Relay, Starter Relay
- Replaces: 28341-11010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1995-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK, MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Flasher Assy, Turn Signal
Part Number: 81980-12070
$53.30 MSRP: $74.50
You Save: $21.20 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Replaced by: 81980-32010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1995-1998 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK
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Toyota Avalon Relay
Part Number: 90987-04004
$56.16 MSRP: $78.50
You Save: $22.34 (29%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Relay, Cooling Fan, NO.2
- Replaced by: 90084-98032
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2013-2018 Toyota Avalon | Limited, XLE, XLE Premium, XLE Touring Or Touring | 4 Cyl 2.5L, 6 Cyl 3.5L | 2ARFXE, 2GRFE; AVX40L-AEXGBA, AVX40L-AEXPBA, GSX40L-AETGKA, GSX40L-AETPKA, GSX40L-AETQKA
- 1998-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK, MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Relay
Part Number: 90987-02025
$65.74 MSRP: $92.66
You Save: $26.92 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Relay, Headlamp
- Replaced by: 90080-87024
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2002-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Relay, Acc
Part Number: 90084-98031
$90.66 MSRP: $127.80
You Save: $37.14 (30%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Relay, Computer (For EFI)
- Replaces: 90084-98025, 90080-87008, 90080-87019, 90987-02012
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1998-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, 1MZFE; MCX20L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK, MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Relay, Acc
Part Number: 90987-02012
$90.66 MSRP: $127.80
You Save: $37.14 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Relay, Computer (For EFI)
- Replaced by: 90084-98031
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2000-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Relay Assembly, Starter
Part Number: 28300-0A010
$72.10 MSRP: $101.63
You Save: $29.53 (30%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Relay Assy, Starter
- Replaced by: 28300-0A011
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2005-2016 Toyota Avalon | Limited, XL, XLE, XLE Premium, XLE Touring Or Touring, XLS | 4 Cyl 2.5L, 6 Cyl 3.5L | 2ARFXE, 2GRFE; AVX40L-AEXGBA, AVX40L-AEXPBA, GSX30L-AEAGKA, GSX30L-AEANKA, GSX30L-AEAPKA, GSX30L-AETGKA, GSX30L-AETNKA, GSX30L-AETPKA, GSX40L-AETGKA, GSX40L-AETPKA, GSX40L-AETQKA
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Toyota Avalon Relay Assembly, Horn
Part Number: 86530-20070
$17.01 MSRP: $23.76
You Save: $6.75 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Horn Relay, Relay
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1995-1999 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK
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Toyota Avalon Relay, Integration
Part Number: 82641-33150
$145.74 MSRP: $207.19
You Save: $61.45 (30%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Relay, Integration NO.1; Power Relay
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2013-2015 Toyota Avalon | Limited, XLE, XLE Premium, XLE Touring Or Touring | 4 Cyl 2.5L, 6 Cyl 3.5L | 2ARFXE, 2GRFE; AVX40L-AEXGBA, AVX40L-AEXPBA, GSX40L-AETGKA, GSX40L-AETPKA, GSX40L-AETQKA
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Toyota Avalon Flasher Assy, Turn Signal
Part Number: 81980-02030
$58.89 MSRP: $82.32
You Save: $23.43 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Flasher, Flasher Relay, Relay, Turn Signal Flasher
- Replaces: 81980-05060, 81980-50030, 81980-05040
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2005-2012 Toyota Avalon | Limited, XL, XLS | 6 Cyl 3.5L | 2GRFE; GSX30L-AEAGKA, GSX30L-AEANKA, GSX30L-AEAPKA, GSX30L-AETGKA, GSX30L-AETNKA, GSX30L-AETPKA
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Toyota Avalon Relay, Radiator Fan
Part Number: 85925-17010
$60.95 MSRP: $85.91
You Save: $24.96 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Fan Relay, Main Relay, Relay
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1997-1999 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK
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Toyota Avalon Relay Assembly
Part Number: 90080-87025
$65.74 MSRP: $92.66
You Save: $26.92 (30%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Relay, Defogger
- Comment: (FOR HEATER BLOWER MOTOR)
- Replaces: 90987-04006, 90987-04010, 90080-87031
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2019-2022 Toyota Avalon | Limited, Touring, XLE, XSE | 4 Cyl 2.5L, 6 Cyl 3.5L | 2GRFKS, A25AFKS, A25AFXS; AXXA55L-AEZGBA, AXXA55L-AEZPBA, AXXH50L-AEXGBA, AXXH50L-AEXPBA, AXXH50L-AEXQBA, AXXH51L-AEXGBA, AXXH51L-AEXPBA, AXXH51L-AEXQBA, GSX50L-AEZGBA, GSX50L-AEZPBA, GSX50L-AEZQBA, GSX50L-AEZSBA
- 2005-2011 Toyota Avalon | Limited, XL, XLS | 6 Cyl 3.5L | 2GRFE; GSX30L-AEAGKA, GSX30L-AEANKA, GSX30L-AEAPKA, GSX30L-AETGKA, GSX30L-AETNKA, GSX30L-AETPKA

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Toyota Avalon Relay

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Toyota Avalon Relay Parts Questions & Experts Answers

Relay Assembly, Starter
28300-10020
Q: How do relays work in electrical system, and how can I test and diagnose relay-related issues on 1997 through 2001 Toyota Avalon?
A: Various electrical accessories within the vehicle, such as the fuel injection system, horns, starter, air conditioning/heating system, and fog lights, utilize relays to transmit electrical signals to the respective components. Relays function by utilizing a low-current control circuit to open and close a high-current power circuit. A defective relay can result in improper component operation. These relays are typically situated in engine compartment fuse/relay boxes. In case of suspected relay malfunction, they can be removed and tested. Faulty relays need to be replaced as a complete unit. To test relays, usually marked for identification, it's important to recognize the control circuit terminals (connected to the relay coil) and the power circuit terminals (connected when the control circuit coil is energized). Fused jumper wires are used to connect the control circuit terminals to the positive battery terminal and the ground. A functional relay should click with these connections. Continuity checks are then performed between the power circuit terminals, following the relay markings. If any of the tests fail, the relay should be replaced.