What is the construction and purpose of automotive electrical relays?

Automotive electrical relays are elements controlling current flow in the vehicle's installation. A typical relay consists of a housing, a coil, power contacts, and pins with a specific layout, and its location is usually in the fuse box or engine compartment. The task of this component is to separate the control circuit from the circuit powering a device with a higher current draw.

What are automotive electrical relays used for?

Relays are used to switch electrical receivers on and off without overloading switches, the ignition switch, or the controller. They enable the operation of systems such as the starter, fuel pump, wipers, radiator fan, or window heating. Without a properly selected relay, the circuit may operate unstably, and connectors and wires are more exposed to overheating.

What is the construction and function of a relay socket?

A relay socket is a part of the installation where the relay is seated and to which power and control wires are routed. It consists of a body and contacts corresponding to the pin layout of a given relay. Its function is to ensure a secure electrical connection, proper seating of the component, and easy removal during diagnostics or replacement.

How to choose a relay for a specific car?

It is best to compare the OEM number, interchangeable numbers, pin layout, installation voltage, and current capacity. It is also worth checking the car brand, engine version, mounting location, and type of electrical box. If the part has a specific housing color or non-standard marking, these features also help avoid mistakes.

What symptoms indicate wear or damage to a relay?

Typical symptoms include no response from the receiver, random switching of the device, excessive heating of the housing, or characteristic clicking without the system working. Sometimes the fault manifests only under load when the contacts are burnt or weakened. In diagnostics, it is also worth checking the fuse, power on the pins, and the condition of the socket.

What should be paid attention to when installing a relay?

Before installation, verify the compliance of pin markings and the direction of seating in the socket. It is also important to clean the contacts, check the wires, and ensure that the circuit has no short circuit or excessive current draw. Proper installation should not require harness modifications if the part has been selected according to the OEM number and vehicle version.

Car electrical relays

At Global Parts, we offer a wide selection of original used car parts, including relays for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. The relays we offer undergo quality control to ensure you receive a top-quality product.

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Volkswagen Polo 6N Audi Rear Relay Wiper 4-Pin Black 1H0955529

£37.95

Free delivery: Aug 05

If paid before 14:00

Part no. 1K0951253-1

VW Volkswagen Audi Seat Relay 449 12V 30A Unit Module 4 Pins 1K0951253

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 141951253B-3

Audi VW Volkswagen Seat Relay Number 53 Unit Module 4 Pins Set Of 2 141951253B

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5M5T14B192EA

Ford Transit Custom Relay 4-Pin Black 12V 40A FOMOCO 5M5T14B192EA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8Z0951253

Skoda Octavia II 5 Pin Black Relay Control Module Unit Set Kit 8Z0951253

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0035420419

Mercedes W177 W205 W247 Relay Fuse Unit Module 4 Pins Black A0035420419

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 6G9T-14B192-DA

Ford Galaxy Mondeo Transit Relay 4-Pin Black FoMoCo Unit 6G9T-14B192-DA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0035421019

Relay Mercedes C117 GLA X156 ML W166 W176 W246 5 Pins Yellow A0035421019

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 1S7T-17L684-AA

Land Rover Discovery 3 Folding Mirror 5 Pin Power Relay L319 1S7T-17L684-AA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. CC11-12B533-AB

Ford Transit Mk7 Custom Glow Plug Relay 2.2 TDCi Euro 5 CC11-12B533-AB

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. A2055406911

Mercedes W205 Engine Fuse Box Module Panel Bracket A2055406911

£80.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5293147-2

Relay Glow Littlefuse Mega Fuse 350 A Amp 5293147

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8200587119

Renault Trafic III Vauxhall Vivaro B Relay 5-Pin Grey Unit 8200587119

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 141951253B-1

VW Volkswagen Audi Seat Skoda Relay Unit 4 Pins 12V 40A 141951253B

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5M5T14B192AA-1

Ford Transit Custom Mk8 Relay 4-Pin Black 12V 20A SET X2 5M5T-14B192-AA

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 6G9T-14B192-CA-1

Ford Fiesta Transit Mk7 Relay 4-Pin Black FoMoCo Unit SET X2 6G9T-14B192-CA

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 6977982-2

Mini Cooper R50 R53 R56 R57 R60 Relay No Contact Taubenblau Blue Set 2X 6977982

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 0-727-12

Durite Relay 4-Pin Multi Use Glow Plug Unit Set 12V 30A 0-727-12 Black

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0025428919-1

Mercedes W176 W246 Relay 5-Pin Yellow Hella 12V SET X2 A0025428919

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 6G9T-14B192-CA

Ford Fiesta Transit Relay 4-Pin Black FoMoCo Unit 6G9T-14B192-CA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. GX73-12B533-AD

Range Rover Evoque L538 Glow Plug Relay Module 2.0 GX73-12B533-AD

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 1J0927841

Audi Volkswagen Seat Skoda ESP Relay Unit Grey 444 1J0927841

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 7M0951253C-1

VW Volkswagen T5 Audi Seat Skoda Relay Black Control Unit 5 Pin 12V 7M0951253C

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. DH22-14B192-CA-1

Range Rover Evoque L538 Relay 5-Pin Unit 12V 40A Grey DH22-14B192-CA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0005459812

Mercedes Vito W447 W213 OM654 Power Distribution Relay Unit Module A0005459812

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. Q0009857V001

Smart Roadster W452 Heated Seat Control Relay Module 9 Pin Black Q0009857V001

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 6938213

BMW E90 LCI Door Wiring Loom Wire Cable Harness Front Right O/S 6938213

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 191937503

VAG VW Volkswagen Audi Seat Skoda Relay Unit 4 Pins 12V 40A 191937503

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8D0951253-1

Audi A4 B6 B7 B8 Q7 4L A6 C7 A8 D4 Multi Use Relay Unit Module 4 Pins 8D0951253

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0035421019-1

Mercedes C117 GLA X156 ML W166 W176 W246 Relay 5 Pins Yellow Set A0035421019

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 1K0951253

VW Volkswagen Audi Seat Relay 449 Unit Module 4 Pins 1K0951253

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8D0951253-2

Audi Q7 4L Relay Unit Module 4 Pins Number 370 Set Of 2 8D0951253

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 1K0951253-2

VW Volkswagen Audi Seat Relay 449 12V 30A Unit Module 4 Pins 1K0951253 X2

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8373700-1

BMW E60 E63 E87 E90 E91 2X Relay Make Contact White Green Set 8373700

£14.95

Free delivery: Aug 05

If paid before 14:00

Part no. 6Q0951253

Volkswagen Polo Mk4 Passat B7 Additional Brake Light Relay 4 Pin Black 6Q0951253

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 141951253B-5

Porsche Carrera 996 Relay Number 53 Unit Module 4 Pins Set X3 141951253B-5

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8366625-1

BMW X5 E53 259 259R 259 R22 Connection Plug Relay Pink Tyco Set x2 8366625

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 1H0953227

Audi Seat Volkswagen Polo 6N Turn Signal Hazard Light Relay 191 1H0953227

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8366625-2

BMW X5 E53 259 259R 259 R22 Connection Plug Relay Pink Tyco Set 4x 8366625

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8366282-1

BMW Z1 Z3 E32 E36 E38 E46 X5 E53 Connection Plug Golden Brown Set x2 8366282

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8507398

Glow Bracket BMW E60 E87 LCI E90 E91 E92 F10 F11 N47 Diesel Relay Plug 8507398

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 191906383C-1

Audi VW Volkswagen Seat Skoda Relay Unit Module 4 Pins 191906383C

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. V23134-J59-X431

Mazda 6 GJ TYCO Relay Black Unit Module 4 Pin 12V V23134-J59-X431

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 156700-2560

Mazda 6 GJ Denso Relay Blue Unit Module 4 Pins 12V AJ51 156700-2560

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. UM4667720

Mazda 6 GJ Relay 5-Pin Electrical Unit Multi-Purpose Relay Grey UM4667720

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5M5T-14B192-EA

Ford Transit Custom Grey Relay 12V 70A 4 Pin ++165271F 5M5T-14B192-EA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5J0959631A

Skoda Fabia 5J Lateral Acceleration Air Module Adaptor Relay 12V 5J0959631A

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5M5T-14B192-EA-1

Ford Transit Custom Relay 4-Pin Black 12V 40A FOMOCO Set X2 5M5T-14B192-EA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4H0951253-1

Audi A3 8P Multi Use Control Module Relay 4 Pin Light Green Unit Set 4H0951253

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 11130287

Vauxhall Movano C 4-Pin Relay Unit 12V 50A Omron Black 11130287

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5M5T-14B192-EA-2

Ford Mondeo Focus Multi Use Grey Relay 12V 70A 4 Pin 5M5T-14B192-EA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 11131885

Vauxhall 4-Pin Red Relay 12V 30A HFV6-G/12HT-R(265) 11131885

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5M5T-14B192-BA

Land Rover Discovery 4 L319 Multi Use Control Module Relay 5M5T-14B192-BA Black

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 7700844253

Renault Relay Module Control Unit Yellow 12V 40A 5 Pins 7700844253

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 3Q0951253

Skoda Karoq Mk1 Octavia Mk3 Audi A1 8X Q3 F3 4 Pin Power Relay 3Q0951253

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 2W9314B192BA

Ford Transit MK6 Seat Relay Black Control Unit Module 4 Pin Set 2W9314B192BA

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8X0951253A

VW Crafter SY Skoda Fabia Mk4 5 Pin Switch Relay 12V Number 655 8X0951253A

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4D0907131

Audi VW Volkswagen Seat Relay Unit Module 4 Pins 12V 4D09907131

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8N7907953

Audi TT 8N Wind Brake Relay Unit Module 8N7907953

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 141951253B

Audi VW Volkswagen Seat Relay Unit Module 4 Pins 141951253B

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 5M5T-14B192-CA

Range Rover L538 Ford Transit Custom Relay 4-Pin Black 12V 40A 5M5T-14B192-CA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. DH22-14B192-BA

Land Rover Discovery Sport L550 Relay 4-Pin Unit 12V 20A Black DH22-14B192-BA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 191906383C

Audi VW Volkswagen Seat Relay Unit Module 4 Pins 191906383C

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 7L6907160C

Volkswagen VW Touareg 7L Relay Unit Servotronic Module 9 Pins 7L6907160C

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. DH22-14B192-EA

Land Rover Discovery Sport L550 Relay 4-Pin Unit 12V 70A Grey DH22-14B192-EA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 6G9T-14B192-DA-1

Ford Galaxy Mondeo Transit Relay 4-Pin Black FoMoCo Unit Set Kit 6G9T14B192DA

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 2S7T-14B192-AA

Range Rover L322 Black Relay 4-Pin Unit 12V 40A 2S7T-14B192-AA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 6G9T-14B192-BA

Ford Galaxy Mondeo Transit Relay 4-Pin Black FoMoCo Unit 6G9T-14B192-BA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0035420219-3

Mercedes W639 W906 Relay 5-Pin Control Unit 12A Blue A0035420219

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 6G9T-14B192-BA-1

Ford Galaxy Mondeo Transit Relay 4-Pin Black FoMoCo Unit SET X2 6G9T-14B192-BA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4H0951253C-1

Volkswagen Polo 6R Tiguan 1T Multi Use Control Module Relay SET 4H0951253C

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0009822523

Mercedes W156 W242 W246 W447 Relay 4-Pin Black Hella A0009822523

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 504063773

Iveco Eurocargo Relay 24V V23134-A56-X441 Blue 504063773

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0009827723-1

Mercedes W176 W204 W246 Fuse Relay 4-Pin Unit Black Hella SET X2 A0009827723

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0009828523

Mercedes W164 Suspension Compressor Relay A0009828523

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0009828323

Mercedes W176 W246 Power Relay Control Module 5 Pin 12V A0009828323

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 431951253H

Audi TT 8N A4 B5 A6 C5 A8 D2 Relay Control Unit Module 12V 4 Pins 431951253H

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. V23234-C0001-X006

Porsche Cayman 987C Tyco Fuse Relay 12V 30A 5 Pins X2 Set V23234-C0001-X006

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8704670

BMW F40 F44 F70 F74 F78 G30 G31 G32 G70 Relay Unit 8704670

£28.95

Free delivery: Aug 05

If paid before 14:00

Part no. 4H0951253E

Audi Q7 4M Engine Relay 4 Pin 40A 4H0951253E

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0035423019-1

Power Relay Control Mercedes W176 W246 Module 4 Pin 12V 20A SET A0035423019

£18.95

Free delivery: Aug 05

If paid before 14:00

Part no. 431951253D

Audi TT 8N Relay Unit Module 431951253D

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 1K0906381

Audi Seat Skoda Volkswagen Relay Multi Use Grey 1K0906381

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0009825323

Mercedes GLC X253 Relay Battery Control Cut Off Out Relay A0009825323

£47.95

Free delivery: Aug 05

If paid before 14:00

Part no. 3B0951253

Volkswagen Golf 5G Caddy 2K Crafter SY Heated Windscreen Relay 4-Pin 3B0951253

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. V23136-B1001-X51

Land Rover Range Rover Evoque L538 4-Blade Relay 40A 12V V23136-B1001-X51

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8K0951253-2

Audi VW Volkswagen Seat Relay 643 Unit Module 4 Pins Set X3 8K0951253

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8D0951253A-1

VW Audi Seat Skoda Multi Use Relay Module 4 Pins 373 Black 12V 40A 8D0951253A

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. A4709820700

Mercedes W470 Glow Plug Relay Module Unit A4709820700

£23.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0009828023

Fuse Relay Mercedes C117 W166 W176 W205 X253 Black 4 Pin 12V A0009828023

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 7L6907160A

Volkswagen VW Touareg 7L Relay Unit Servotronic Module 6 Pins 7L6907160A

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 443937105B

VW Volkswagen Audi Skoda Seat Little Fuse Amp 30A 12V 443937105A

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 8D0951253

Audi Q7 4L Relay Unit Module 4 Pins 8D0951253

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 2755650

Mounting Heater Relay Mini R55 R56 Cooper D W16 Holder Bracket Mount 2755650

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 9353066

BMW F20 F21 F30 F31 Relay Cover Electric Fan Relay Cap 9353066

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. DH22-14B192-CA

Range Rover Evoque L538 Relay 4-Pin Unit 12V 40A Black DH22-14B192-CA

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. 7M0951253C-3

VW Volkswagen Audi Seat Skoda Relay Black Control 5 Pin 12V 7M0951253C Set X2

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0035455005

Mercedes W202 W210 Kick Down Kickdown Relay Electrical Module Unit A0035455005

£13.95

Free delivery: Aug 05

If paid before 14:00

Part no. A0035420219-2

Mercedes W639 W906 Relay 5-Pin Control Unit 12A Blue SET X2 A0035420219

£18.95

Free delivery: Aug 05

If paid before 14:00

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