How do I perform horn diagnostics, troubleshoot issues, and remove the horn in the Lexus ES300?

Disconnect the electrical connector from the horn and test it with battery voltage. If it doesn't sound, replace it; if it does, check for voltage at the terminal when the horn button is pressed. If there's voltage, check the ground connection. If not, inspect the horn relay and its wiring. If both have voltage, test the circuit from the relay to the horn button. If absent, check for an open circuit or replace the horn button. If continuity exists, check for an open or short in the circuit from the relay to the horn. For removal, disconnect the connector and remove the bracket bolt. To reinstall, switch the removal steps going from the last step to the first step.

Genuine Lexus ES300 Horn

Alarm Horn

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20 Horns found

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Lexus ES300 Horn Assy, Low Pitched
Part Number: 86520-48030
$72.46 MSRP: $96.43
You Save: $23.97 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 86520-AA010
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2003 Lexus ES300 | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCV31L-BEAGKA
View related parts
Lexus ES300 Horn Assy, High Pitched
Part Number: 86510-48050
$72.46 MSRP: $96.43
You Save: $23.97 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 86510-AA010
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2003 Lexus ES300 | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCV31L-BEAGKA
View related parts
Lexus ES300 Horn Assy, Low Pitched
Part Number: 86520-33040
$129.69 MSRP: $175.38
You Save: $45.69 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 86520-24040
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1992-1996 Lexus ES300 | 6 Cyl 3.0L | 1MZFE, 3VZFE; 1MZFE, 3VZFE; MCV10L-BTPGKA, MCV10L-BTPGKK, VCV10L-BTMGKA, VCV10L-BTMGKK, VCV10L-BTPGKA, VCV10L-BTPGKK
View related parts
Lexus ES300 Horn Assy, High Pitched
Part Number: 86510-33190
$72.46 MSRP: $96.43
You Save: $23.97 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 86510-AA010
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2002-2003 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCV30L-BEAGKA
View related parts
Lexus ES300 Horn Assy, Low Pitched
Part Number: 86520-33120
$72.46 MSRP: $96.43
You Save: $23.97 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 86520-AA010
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2002-2003 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCV30L-BEAGKA
View related parts
Lexus ES300 Horn Assy, Security
Part Number: 86510-48020
$85.77 MSRP: $115.99
You Save: $30.22 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Horn
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2002-2003 Lexus ES300 | 6 Cyl 3.0L, 6 Cyl 3.3L | 1MZFE, 3MZFE; 1MZFE, 3MZFE; MCV30L-BEAGKA, MCV31L-BEAGKA
View related parts
Lexus ES300 Horn Assy, Low Pitched
Part Number: 86520-33080
$101.26 MSRP: $134.75
You Save: $33.49 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 86520-33081
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1997-2001 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
View related parts
Lexus ES300 Horn Assy, Low Pitched
Part Number: 86520-33081
$99.64 MSRP: $134.75
You Save: $35.11 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Horn
- Replaces: 86520-33080
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1997-2001 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
View related parts
Lexus ES300 Horn Assy, Low Pitched
Part Number: 86520-33121
$104.30 MSRP: $138.79
You Save: $34.49 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: KOREA SPEC
- Replaced by: 86520-33122
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2003 Lexus ES300 | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCV31L-BEAGKA
View related parts
Lexus ES300 Horn Assy, High Pitched
Part Number: 86510-68010
$78.55 MSRP: $104.53
You Save: $25.98 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: TAIWAN SPEC
- Replaces: 86510-33050
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2003 Lexus ES300 | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCV31L-BEAGKA
View related parts
Lexus ES300 Horn Assy, Low Pitched
Part Number: 86520-68010
$78.55 MSRP: $104.53
You Save: $25.98 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: TAIWAN SPEC
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2003 Lexus ES300 | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCV31L-BEAGKA
View related parts
Lexus ES300 Horn Assy, High Pitched
Part Number: 86510-33191
$104.30 MSRP: $138.79
You Save: $34.49 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: KOREA SPEC
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2003 Lexus ES300 | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCV31L-BEAGKA
View related parts
Lexus ES300 Horn Assy, Security
Part Number: 86510-33110
Product Specifications
- Replaced by: 86510-33111
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1997-2000 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
View related parts
Lexus ES300 Horn Assy, Security
Part Number: 86510-33111
Product Specifications
- Other Name: Horn
- Replaces: 86510-33110
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1997-2001 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
View related parts
Lexus ES300 Horn Assy, High Pitched
Part Number: 86510-33140
Product Specifications
- Other Name: Horn
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1997-2001 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
View related parts
Lexus ES300 Horn Assy, Low Pitched
Part Number: 86520-33070
Product Specifications
- Manufacturer Note: TAIWAN SPEC
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2002-2003 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCV30L-BEAGKA
View related parts
Lexus ES300 Horn Assy, Security
Part Number: 86510-33010
Product Specifications
- Other Name: Horn
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1992-1994 Lexus ES300 | 6 Cyl 3.0L | 3VZFE; 3VZFE; VCV10L-BTMGKA, VCV10L-BTMGKK, VCV10L-BTPGKA, VCV10L-BTPGKK
View related parts
Lexus ES300 Horn Assy, High Pitched
Part Number: 86510-33070
Product Specifications
- Other Name: Horn
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1992-1996 Lexus ES300 | 6 Cyl 3.0L | 1MZFE, 3VZFE; 1MZFE, 3VZFE; MCV10L-BTPGKA, MCV10L-BTPGKK, VCV10L-BTMGKA, VCV10L-BTMGKK, VCV10L-BTPGKA, VCV10L-BTPGKK
View related parts
Lexus ES300 Horn Assy, High Pitched
Part Number: 86510-33130
Product Specifications
- Manufacturer Note: TAIWAN SPEC
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2002-2003 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCV30L-BEAGKA
View related parts
Lexus ES300 Horn Assy, Security
Part Number: 86510-33100
Product Specifications
- Other Name: Horn
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1993-1996 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCV10L-BTPGKA, MCV10L-BTPGKK

Lexus ES300 Horn

Should you need to purchase new auto parts for your vehicle, we strongly suggest you consider the genuine Lexus ES300 Horn available on LexusPartsNow.com. Our OEM Lexus ES300 Horn come with the reassurance of the manufacturer's warranty, a hassle-free return policy, and speedy delivery service, all at affordable prices online. Feel free to shop with confidence!

Lexus ES300 Horn Parts Questions & Experts Answers

Horn Assy, Security
86510-33110
Q: How do I perform horn diagnostics, troubleshoot issues, and remove the horn in the Lexus ES300?
A: Disconnect the electrical connector from the horn and test it with battery voltage. If it doesn't sound, replace it; if it does, check for voltage at the terminal when the horn button is pressed. If there's voltage, check the ground connection. If not, inspect the horn relay and its wiring. If both have voltage, test the circuit from the relay to the horn button. If absent, check for an open circuit or replace the horn button. If continuity exists, check for an open or short in the circuit from the relay to the horn. For removal, disconnect the connector and remove the bracket bolt. To reinstall, switch the removal steps going from the last step to the first step.

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