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How a car horn works and replacement cost

Table of content

  1. How does a car horn function?
  2. Where is it installed in my vehicle?
  3. When am I allowed to sound my horn?
  4. Defective car horn
  5. How much does it cost to repair a car horn?

You may be familiar with this: the driver in front of you doesn't notice that the traffic lights have long since turned green; the student driver stalls the vehicle for the umpteenth time; someone else leaves the roundabout without signalling. All these situations have one thing in common – they make you feel the urge for a reprimanding "honk"– also known as a klaxon sound. But are you allowed to do this? Here we’ll explain how a car horn works and when you are allowed to use it and when you are not.How does a car horn function

How does a car horn function?

Horns are metal components that are vibrated when your car is moving. A tone is then created electronically with a fine metal plate and an electromagnet. When this is activated with the use of a button, it applies power to the plate thereby creating the sound.

Where is it installed in my vehicle?

First, locate the horn in the bonnet. The car horn is a spherical part usually with a prominent opening. In most cases, the horn is located near the radiator grille and is about 5 inches in diameter. Another option is to check the car owner’s manual, this should assist you in finding its exact location.

When am I allowed to sound my horn?

You may use the horn as a warning to other road users if you believe yourself or others to be in danger. For example, you may warn an oncoming vehicle of an unsecured accident scene behind you or use the horn to draw attention to yourself in the event of a sudden lane change by the vehicle next to you. You are also permitted to sound the horn if a vehicle tries to pull out of the parking space without consideration or if a child runs onto the road between parked cars. In short, you may only honk your horn as a warning signal or as an indicator that you are overtaking another vehicle.

-54%
S90 HELLA 3AM 922 000-971 Air Horn
Reviews - 12
Parts Details
  • Voltage [V]: 12
  • Power Consumption [W]: 42
  • Sound Level [dB(A)]: 111
  • Frequency Range [Hz]: 350, 415
  • Power consumption [A]: 3,5
  • Protection Type (IP Code): IP65
  • fulfils ECE norm: R28
  • Registration Type: ECE approved
  • Signal: High Tone, Low Tone
  • Housing Colour: red / black
  • Quantity: 2
  • Operating Mode: Electric
  • Diameter [mm]: 90
  • Temperature range from [°C]: -40
  • Temperature range to [°C]: 90
  • Mounting Type: Flat Plug-in Connector
  • Supplementary Article / Supplementary Info Info 2: with E quality seal
  • Assy. / disassy. by qualified personnel required!
  • HELLA: Air Horn
  • Item number: 3AM 922 000-971
  • Our price: £ 9,67
  • Condition: New
Details
HELLA Air Horn
Article number: 3AM 922 000-971
compared to RRP £ 21,23

£ 9,67
price incl. 20% VAT, excl. delivery costs
WINDTONE, 12V LOW, BLA BOSCH 0 986 AH0 501 Horn 12V, 110 dB(A), Electric-pneumatic, 60W, Holder may need adaptation
Reviews - 4
Parts Details
  • Length [mm]: 92
  • Bore Diameter [mm]: 8,7
  • Operating Mode: Electric-pneumatic
  • Voltage [V]: 12
  • Power Consumption [W]: 60
  • Sound Level [dB(A)]: 110
  • Width [mm]: 57
  • Height [mm]: 123,6
  • Supplementary Article / Supplementary Info Info 2: Holder may need adaptation
  • Connector / Clamp: Connector may need adjustment
  • BOSCH: Horn
  • Item number: 0 986 AH0 501
  • Our price: £ 11,00
  • Condition: New
Details
BOSCH Horn 12V, 110 dB(A), Electric-pneumatic, 60W, Holder may need adaptation
Article number: 0 986 AH0 501
£ 11,00
price incl. 20% VAT, excl. delivery costs
-39%
M 26 HELLA 3AL 002 952-871 Air Horn
Reviews - 80
Parts Details
  • Voltage [V]: 24
  • Power Consumption [W]: 84
  • Sound Level [dB(A)]: 105
  • Frequency Range [Hz]: 335
  • Power consumption [A]: 3,5
  • Protection Type (IP Code): IPX7, IPX9K
  • fulfils ECE norm: R28
  • Registration Type: ECE approved
  • Housing Colour: grey
  • Signal: Low Tone
  • Quantity: 1
  • Operating Mode: Electric
  • Overall Height [mm]: 122
  • Diameter [mm]: 97
  • Depth [mm]: 54
  • Temperature range from [°C]: -40
  • Temperature range to [°C]: 60
  • Mounting Type: Flat Plug-in Connector
  • Supplementary Article / Supplementary Info Info 2: with E quality seal, with moisture protection
  • Assy. / disassy. by qualified personnel required!
  • HELLA: Air Horn
  • Item number: 3AL 002 952-871
  • Our price: £ 11,45
  • Condition: New
Details
HELLA Air Horn
Article number: 3AL 002 952-871
compared to RRP £ 18,83

£ 11,45
price incl. 20% VAT, excl. delivery costs
-12%
S90 HELLA 3AL 922 000-961 Air Horn
Reviews - 1
Parts Details
  • Frequency Range [Hz]: 415
  • Power Consumption [W]: 42
  • Voltage [V]: 12
  • Mounting Type: Flat Plug-in Connector
  • Supplementary Article / Supplementary Info Info 2: with E quality seal
  • Registration Type: ECE approved
  • Protection Type (IP Code): IPX9K
  • Signal: High Tone
  • Temperature range from [°C]: -40
  • Temperature range to [°C]: 90
  • Diameter [mm]: 90
  • fulfils ECE norm: R28
  • Housing Colour: red / black
  • Sound Level [dB(A)]: 113
  • Assy. / disassy. by qualified personnel required!
  • HELLA: Air Horn
  • Item number: 3AL 922 000-961
  • Our price: £ 10,00
  • Condition: New
Details
HELLA Air Horn
Article number: 3AL 922 000-961
compared to RRP £ 11,41

£ 10,00
price incl. 20% VAT, excl. delivery costs
BOSCH 0 986 AH0 731 Air Horn
Parts Details
  • Bore Diameter [mm]: 8,3
  • Rated Voltage [V]: 12
  • Power Consumption [W]: 60
  • Operating Mode: Electric
  • Diameter [mm]: 76
  • Weight [kg]: 0,2
  • Sound Level [dB(A)]: 110
  • Specification: schwarz
  • BOSCH: Air Horn
  • Item number: 0 986 AH0 731
  • Our price: £ 9,27
  • Condition: New
Details
BOSCH Air Horn
Article number: 0 986 AH0 731
£ 9,27
price incl. 20% VAT, excl. delivery costs

Defective car horn

If your car horn isn’t working It could be that you have a blown-out fuse. To determine this, you should open the fuse compartment in your vehicle. Most likely, you will find it on the left-hand side of the driver's side. Remove the relevant fuse either with your fingers or an appropriate tool. There is a wire between the two contacts in the centre of the fuse. If this wire is damaged, you’ll need to buy car fuses. If this doesn’t solve your problem, you may need to get a replacement such as a new horn from HELLA horns.

How much does it cost to repair a car horn?

As with all things, the cost of fixing a car horn will depend on the particular dealership or workshop, so it’s wise to shop around. Generally speaking, replacing the fuses will run you about £16 while a professional car air horn replacement costs around £75 to £115. Your car horn is an important part of your car and helps to ensure the safety of you, your passengers, and other road users, so make sure it’s of good quality and always in proper working order.

Top products related to this topic:

AUTODOC Bestsellers: parts at a good price

CARPOINT Tour de France 0524731 Horn 12V, 117 dB(A), Low Tone, Middle Tone, High Tone, pneumatic
Reviews - 1
Parts Details
  • Voltage [V]: 12
  • Sound Level [dB(A)]: 117
  • Operating Mode: pneumatic
  • Signal: Low Tone, Middle Tone, High Tone
  • Product line: Tour de France
  • Fastening Type: Direct fastening
  • CARPOINT: Horn
  • Item number: 0524731
  • Our price: £ 106,91
  • Condition: New
Details
CARPOINT Horn 12V, 117 dB(A), Low Tone, Middle Tone, High Tone, pneumatic
Article number: 0524731
£ 106,91
price incl. 20% VAT, excl. delivery costs
-71%
VEMO Original Quality V10-77-0911 Air Horn
Reviews - 1
Parts Details
  • Voltage [V]: 12
  • Diameter [mm]: 100
  • Operating Mode: Electric
  • Frequency Range [Hz]: 335
  • Weight [kg]: 0,246
  • Product line: Original Quality
  • Packaging width [cm]: 8,8
  • Packaging height [cm]: 8,2
  • Packaging Depth [cm]: 14,1
  • VEMO: Air Horn
  • Item number: V10-77-0911
  • Our price: £ 14,63
  • Condition: New
Details
VEMO Air Horn
Article number: V10-77-0911
compared to RRP £ 50,57

£ 14,63
price incl. 20% VAT, excl. delivery costs
AMiO 01715 Air Horn
Reviews - 21
Parts Details
  • Rated Voltage [V]: 12
  • Signal Horn: Multi-tone Trumpet Horn
  • Frequency Range [Hz]: 410, 510
  • Sound Level [dB(A)]: 110+ / -5
  • Housing Colour: silver
  • Signal: High Tone
  • Surface: Polished
  • Vehicle type: CHR-01
  • AMiO: Air Horn
  • Item number: 01715
  • Our price: £ 7,57
Details
AMiO Air Horn
Article number: 01715
£ 7,57
price incl. 20% VAT, excl. delivery costs
-40%
M 26 HELLA 3AL 002 952-811 Air Horn
Reviews - 2
Parts Details
  • Voltage [V]: 12
  • Power Consumption [W]: 66
  • Sound Level [dB(A)]: 105
  • Frequency Range [Hz]: 400
  • Power consumption [A]: 5,5
  • Protection Type (IP Code): IPX9K
  • fulfils ECE norm: R28
  • Registration Type: ECE approved
  • Housing Colour: grey / black
  • Quantity: 1
  • Signal: High Tone
  • Operating Mode: Electric
  • Overall Height [mm]: 122
  • Depth [mm]: 54
  • Diameter [mm]: 97
  • Temperature range from [°C]: -40
  • Temperature range to [°C]: 60
  • Mounting Type: Flat Plug-in Connector
  • Supplementary Article / Supplementary Info Info 2: with E quality seal
  • Assy. / disassy. by qualified personnel required!
  • HELLA: Air Horn
  • Item number: 3AL 002 952-811
  • Our price: £ 10,85
  • Condition: New
Details
HELLA Air Horn
Article number: 3AL 002 952-811
compared to RRP £ 18,17

£ 10,85
price incl. 20% VAT, excl. delivery costs
-73%
111 072 001 TOPRAN 111 072 Air Horn with fastening material
Reviews - 11
Parts Details
  • Operating Mode: Electric
  • Number of pins: 2
  • Signal: High Tone
  • Frequency Range [Hz]: 510
  • Connector Shape: oval
  • Supplementary Article / Supplementary Info Info 2: with fastening material
  • Operating voltage [V]: 12
  • TOPRAN: Air Horn
  • Item number: 111 072
  • Our price: £ 7,46
  • Condition: New
Details
TOPRAN Air Horn with fastening material
Article number: 111 072
compared to RRP £ 27,88

£ 7,46
price incl. 20% VAT, excl. delivery costs
DPA 99510002602 Horn Low Tone
Reviews - 2
Parts Details
  • Signal: Low Tone
  • DPA: Horn
  • Item number: 99510002602
  • Our price: £ 12,13
  • Condition: New
Details
DPA Horn Low Tone
Article number: 99510002602
£ 12,13
price incl. 20% VAT, excl. delivery costs
-49%
DL 50 HELLA 3CB 004 811-042 Air Horn
Parts Details
  • Voltage [V]: 12
  • Power Consumption [W]: 72
  • Sound Level [dB(A)]: 114
  • Frequency Range [Hz]: 310, 380
  • Power consumption [A]: 6
  • Protection Type (IP Code): IP54
  • fulfils ECE norm: R28
  • Registration Type: ECE approved
  • Housing Colour: black
  • Signal: Low Tone, High Tone
  • Quantity: 2
  • Operating Mode: Electric
  • Overall Height [mm]: 143
  • Diameter [mm]: 130
  • Depth [mm]: 61
  • Temperature range from [°C]: -20
  • Temperature range to [°C]: 80
  • Mounting Type: Flat Plug-in Connector
  • Supplementary Article / Supplementary Info Info 2: with E quality seal
  • Assy. / disassy. by qualified personnel required!
  • HELLA: Air Horn
  • Item number: 3CB 004 811-042
  • Our price: £ 25,77
  • Condition: New
Details
HELLA Air Horn
Article number: 3CB 004 811-042
compared to RRP £ 50,82

£ 25,77
price incl. 20% VAT, excl. delivery costs
-44%
VEMO Original Quality V20-77-0005 Horn 12V, 420 Hz, Low Tone, 41W
Reviews - 1
Parts Details
  • Frequency Range [Hz]: 420
  • Signal: Low Tone
  • Weight [kg]: 0,278
  • Power Consumption [W]: 41
  • Voltage [V]: 12
  • Product line: Original Quality
  • Packaging Depth [cm]: 14,1
  • VEMO: Horn
  • Item number: V20-77-0005
  • Our price: £ 22,87
  • Condition: New
Details
VEMO Horn 12V, 420 Hz, Low Tone, 41W
Article number: V20-77-0005
compared to RRP £ 41,15

£ 22,87
price incl. 20% VAT, excl. delivery costs
-32%
JP GROUP 1199500500 Horn Dual-tone Trumpet Horn, Low Tone
Reviews - 2
Parts Details
  • Signal Horn: Dual-tone Trumpet Horn
  • Signal: Low Tone
  • JP GROUP: Horn
  • Item number: 1199500500
  • Our price: £ 10,48
  • Condition: New
Details
JP GROUP Horn Dual-tone Trumpet Horn, Low Tone
Article number: 1199500500
compared to RRP £ 15,62

£ 10,48
price incl. 20% VAT, excl. delivery costs
-20%
TE26 SET HELLA 3FH 012 010-021 Air / Electric Horn
Reviews - 26
Parts Details
  • Voltage [V]: 12
  • Power Consumption [W]: 72
  • Sound Level [dB(A)]: 110
  • Frequency range from [Hz]: 400
  • Frequency range to [Hz]: 500
  • Power consumption [A]: 6
  • Protection Type (IP Code): IP65
  • fulfils ECE norm: R28
  • Registration Type: ECE approved
  • Signal: High Tone, Low Tone
  • Housing Colour: black
  • Quantity: 2
  • Operating Mode: Electric
  • Diameter 1 [mm]: 86
  • Temperature range from [°C]: -40
  • Temperature range to [°C]: +90
  • Assy. / disassy. by qualified personnel required!
  • HELLA: Air / Electric Horn
  • Item number: 3FH 012 010-021
  • Our price: £ 18,63
  • Condition: New
Details
HELLA Air / Electric Horn
Article number: 3FH 012 010-021
compared to RRP £ 23,41

£ 18,63
price incl. 20% VAT, excl. delivery costs
-11%
TE26 SET HELLA 3FH 012 010-081 Air / Electric Horn
Reviews - 11
Parts Details
  • Voltage [V]: 12
  • Power Consumption [W]: 72
  • Sound Level [dB(A)]: 110
  • Frequency range from [Hz]: 400
  • Frequency range to [Hz]: 500
  • Power consumption [A]: 6
  • Protection Type (IP Code): IP65
  • fulfils ECE norm: R28
  • Registration Type: ECE approved
  • Signal: Low Tone, High Tone
  • Housing Colour: black
  • Quantity: 2
  • Operating Mode: Electric
  • Diameter 1 [mm]: 86
  • Temperature range from [°C]: -40
  • Temperature range to [°C]: 90
  • Plug Type ID: Ford
  • Assy. / disassy. by qualified personnel required!
  • HELLA: Air / Electric Horn
  • Item number: 3FH 012 010-081
  • Our price: £ 20,09
  • Condition: New
Details
HELLA Air / Electric Horn
Article number: 3FH 012 010-081
compared to RRP £ 22,73

£ 20,09
price incl. 20% VAT, excl. delivery costs
CARPOINT 0524703 Horn 12V, 405 - 495 Hz, 112 dB(A), Steel, Plastic, red/black, 108W
Reviews - 3
Parts Details
  • Rated Voltage [V]: 12
  • Frequency Range [Hz]: 405 - 495
  • Sound Level [dB(A)]: 112
  • Power Consumption [W]: 108
  • Housing Colour: red / black
  • Quantity: 2
  • Material: Steel, Plastic
  • Full Set: +
  • Parameter: electric compressor
  • CARPOINT: Horn
  • Item number: 0524703
  • Our price: £ 24,45
  • Condition: New
Details
CARPOINT Horn 12V, 405 - 495 Hz, 112 dB(A), Steel, Plastic, red/black, 108W
Article number: 0524703
£ 24,45
Price per set of 2 pieces
price incl. 20% VAT, excl. delivery costs
-22%
TE26 SET HELLA 3FH 012 010-031 Air / Electric Horn
Reviews - 13
Parts Details
  • Voltage [V]: 12
  • Power Consumption [W]: 72
  • Sound Level [dB(A)]: 110
  • Frequency range from [Hz]: 400
  • Frequency range to [Hz]: 500
  • Power consumption [A]: 6
  • Protection Type (IP Code): IP65
  • fulfils ECE norm: R28
  • Registration Type: ECE approved
  • Signal: Low Tone, High Tone
  • Housing Colour: black
  • Quantity: 2
  • Operating Mode: Electric
  • Diameter 1 [mm]: 86
  • Temperature range from [°C]: -40
  • Temperature range to [°C]: 90
  • Assy. / disassy. by qualified personnel required!
  • HELLA: Air / Electric Horn
  • Item number: 3FH 012 010-031
  • Our price: £ 18,21
  • Condition: New
Details
HELLA Air / Electric Horn
Article number: 3FH 012 010-031
compared to RRP £ 23,41

£ 18,21
price incl. 20% VAT, excl. delivery costs
-33%
E1 000209 HELLA 3FH 007 424-811 Air / Electric Horn
Reviews - 14
Parts Details
  • Voltage [V]: 12
  • Power Consumption [W]: 72
  • Sound Level [dB(A)]: 110
  • Frequency range from [Hz]: 400
  • Frequency range to [Hz]: 500
  • Power consumption [A]: 6
  • Protection Type (IP Code): IP65
  • fulfils ECE norm: R28
  • Registration Type: ECE approved
  • Signal: Low Tone, High Tone
  • Housing Colour: red / black
  • Quantity: 2
  • Operating Mode: Electric
  • Overall Height [mm]: 89
  • Width [mm]: 109
  • Depth [mm]: 80
  • Temperature range from [°C]: -40
  • Temperature range to [°C]: 80
  • Mounting Type: Flat Plug-in Connector
  • Supplementary Article / Supplementary Info: without accessories
  • Supplementary Article / Supplementary Info Info 2: with E quality seal
  • Assy. / disassy. by qualified personnel required!
  • HELLA: Air / Electric Horn
  • Item number: 3FH 007 424-811
  • Our price: £ 15,56
  • Condition: New
Details
HELLA Air / Electric Horn
Article number: 3FH 007 424-811
compared to RRP £ 23,24

£ 15,56
price incl. 20% VAT, excl. delivery costs
-45%
S90 HELLA 3AL 922 000-951 Air Horn
Reviews - 1
Parts Details
  • Voltage [V]: 12
  • Power Consumption [W]: 42
  • Sound Level [dB(A)]: 111
  • Frequency Range [Hz]: 350
  • Power consumption [A]: 3,5
  • Protection Type (IP Code): IP65
  • fulfils ECE norm: R28
  • Registration Type: ECE approved
  • Signal: High Tone
  • Housing Colour: red / black
  • Quantity: 1
  • Operating Mode: Electric
  • Diameter [mm]: 90
  • Temperature range from [°C]: -40
  • Temperature range to [°C]: 90
  • Mounting Type: Flat Plug-in Connector
  • Supplementary Article / Supplementary Info Info 2: with E quality seal
  • Assy. / disassy. by qualified personnel required!
  • HELLA: Air Horn
  • Item number: 3AL 922 000-951
  • Our price: £ 5,74
  • Condition: New
Details
HELLA Air Horn
Article number: 3AL 922 000-951
compared to RRP £ 10,49

£ 5,74
price incl. 20% VAT, excl. delivery costs

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