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Car sensors, relays, control units parts

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Sensors, relays, control units auto parts for all top car brands

Automotive sensors, relays, control units parts for top car models

Sensors, relays, control units for your car: find out more! Which ones to choose, when to change them, and how much they cost

Sensors, relays, and control units are electronic devices whose main function is to oversee the operation of many car systems. The first ones monitor particular changes in the working environment. The second ones power the required branches of electrical circuits. The last ones assess the readings they receive and send commands to corresponding devices.

The design of sensors, relays, and control units

Generally, automotive sensors consist of a sensitive element enclosed by a plastic body, to which a wire connector is attached. The operating principle of the sensitive element is based on various physical and chemical properties of different materials. For example, heater resistors are used to measure temperature and strain gauges to measure pressure. Devices which determine position and speed are based on the Hall effect, that is, the inductive or magnetoresistive properties of certain materials.

Relays generally have a plastic body with an electromagnet, inside of which are movable and stationary contacts. When the electromagnet is powered, it drives the movable contact which opens or closes the circuit.

Control units consist of a microchip with a CPU, analog-to-digital (ADC) and digital-to-analog converters (DAC), a housing, and connectors for wires. The microchip includes a storage device with software.

Maintenance tips

  • Observe the torque specified by the manufacturer during installation. Many spare parts have a thread which can easily be damaged by overtightening.
  • Always replace technical fluids on time. The contaminants they contain can build up on the sensitive elements of measuring devices causing them to operate incorrectly.
  • You should always make sure that all elements in relays and fuses are properly attached. Loose fittings and the resulting vibrations have a devastating effect on elements of these parts.
  • Occasionally clean connectors using special products. Their contacts can start corroding if exposed to dirt and moisture.
  • Use only components that comply with the technical requirements of your vehicle.
  • Avoid amateur repairs to your vehicle’s electrical wiring.

Malfunction symptoms

A variety of symptoms can indicate faulty components. For example, if a throttle position or fuel consumption sensor fails, the engine no longer runs smoothly. In particular, its power is reduced and it starts jerking during acceleration. The engine may even stall while changing gears. Rough idling occurs as well. Sometimes when a device fails, the corresponding warning light goes off on the instrument panel.

If a relay is broken, the equipment it controls generally won’t work. Conversely, in some cases it can no longer be switched off. This usually happens when movable contacts get stuck.

Faulty control units make corresponding assemblies operate incorrectly: fuel pumps, injection system components, etc. Sometimes, the engine won’t start. It is also impossible to perform self-testing of the unit.

Malfunction causes

Moisture and dirt may get into loosely attached connectors, which results in corroded contacts or a short circuit. When the housing isn’t airtight, the contacts of microchips become oxidised as well. Reckless handling of a vehicle, such as the removal of the battery terminal while the engine is running can cause voltage spikes and make the equipment burn out. It is also dangerous to let sparks get onto electronic devices or wring when performing auto body works involving welding.

autodoc.co.uk: Only high-quality automotive products

We recommend that you buy sensors, relays, and control units from our online store. And here are the reasons why: All our spare parts are of high quality, our experienced specialists are always happy to help you choose a product, and our delivery is extremely quick.

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Top 15 of best sellers from the car parts sensors, relays, control units

Recommended spare parts from the Sensors, relays, control units section. These are the sales hits. Buy our best sellling items or discover a vast selection of other attractive offers.

Lambda sensor DENSO DOX-0204 car Sensors, relays, control units parts cost
Parts Details
  • Product line: Direct Fit
  • Thread Size: M18x1,5
  • Lambda Sensor: Heated, Finger probe, Thread pre-greased, Lambda Sensor
  • Cable Length [mm]: 360
  • Number of pins: 4
  • for OE number: 8946505100
  • Quality: OE
  • Weight [g]: 94
  • Manufacturer Restriction: DENSO
  • Gross Weight [g]: 127
  • DENSO: Lambda sensor
  • Item number: DOX-0204
  • Our price: £ 57,39
  • Condition: New
Details
DENSO DOX-0204 Lambda sensor M18x1,5, Heated, Finger probe, Thread pre-greased, Lambda Sensor
Article number: DOX-0204
£ 57,39
price incl. 20% VAT, excl. delivery costs
Throttle position sensor DELPHI SS10562-12B1 car Sensors, relays, control units parts cost
Parts Details
  • Number of pins: 3
  • Operating Mode: Mechanical
  • DELPHI: Throttle position sensor
  • Item number: SS10562-12B1
  • Our price: £ 16,54
  • Condition: New
Details
DELPHI SS10562 Throttle position sensor
Article number: SS10562-12B1
£ 16,54
price incl. 20% VAT, excl. delivery costs
Blower motor resistor DENSO DRS21008 car Sensors, relays, control units parts cost
Parts Details
  • for OE number: 1609171180
  • Weight [g]: 160
  • Gross Weight [g]: 180
  • DENSO: Blower motor resistor
  • Item number: DRS21008
  • Our price: £ 44,35
  • Condition: New
Details
DENSO DRS21008 Blower motor resistor
Article number: DRS21008
£ 44,35
price incl. 20% VAT, excl. delivery costs
Control Unit, injection system BOSCH 0 986 444 954 car Sensors, relays, control units parts cost
Parts Details
  • Service exchange part
  • Supplementary Article / Supplementary Info: with accessories
  • BOSCH: Control Unit, injection system
  • Item number: 0 986 444 954
  • Our price: £ 132,17
  • Condition: Remanufactured
Details
BOSCH 0 986 444 954 Control Unit, injection system
Article number: 0 986 444 954
£ 132,17
price incl. 20% VAT, excl. delivery costs
-37%
Starter solenoid AS-PL SS9027 auto Sensors, relays, control units parts price
Parts Details
  • Voltage [V]: 12
  • Quality: STANDARD LINE
  • New part without deposit
  • AS-PL: Starter solenoid
  • Item number: SS9027
  • Our price: £ 20,29
  • Condition: New
Details
AS-PL SS9027 Starter solenoid
Article number: SS9027
compared to RRP £ 32,29

£ 20,29
price incl. 20% VAT, excl. delivery costs
Particle Sensor BOSCH 0 281 008 528 auto Sensors, relays, control units parts price
Parts Details
  • BOSCH: Particle Sensor
  • Item number: 0 281 008 528
  • Our price: £ 203,02
  • Condition: New
Details
BOSCH EGS-PM2 Particle Sensor
Article number: 0 281 008 528
£ 203,02
price incl. 20% VAT, free delivery
Lambda sensor BOSCH 0 258 006 537 auto Sensors, relays, control units parts price
Parts Details
  • Overall Length [mm]: 440
  • Number of circuits: 4
  • Recommended change interval [km]: 250000
  • Available as universal article as well, see article no.: 0258986602
  • BOSCH: Lambda sensor
  • Item number: 0 258 006 537
  • Our price: £ 31,49
  • Condition: New
Details
BOSCH LS 6537 Lambda sensor 4
Article number: 0 258 006 537
£ 31,49
price incl. 20% VAT, excl. delivery costs
Alternator Regulator VALEO 593793 auto Sensors, relays, control units parts price
Parts Details
  • Weight [kg]: 0,125
  • VALEO: Alternator Regulator
  • Item number: 593793
  • Our price: £ 46,68
  • Condition: New
Details
VALEO TG15C012 Alternator Regulator
Article number: 593793
£ 46,68
price incl. 20% VAT, excl. delivery costs
Mass air flow sensor BOSCH 0 281 006 092 cheap Sensors, relays, control units parts
Parts Details
  • Recommended additional repairs: Air Filter
  • BOSCH: Mass air flow sensor
  • Item number: 0 281 006 092
  • Our price: £ 109,87
  • Condition: New
Details
BOSCH HFM7-IP SF Mass air flow sensor
Article number: 0 281 006 092
£ 109,87
price incl. 20% VAT, excl. delivery costs
-29%
Sensor, exhaust pressure FEBI BILSTEIN 173118 cheap Sensors, relays, control units parts
Parts Details
  • Number of connectors: 3
  • Weight [kg]: 0,050
  • for OE number: 82 00 974 421
  • FEBI BILSTEIN: Sensor, exhaust pressure
  • Item number: 173118
  • Our price: £ 43,41
  • Condition: New
Details
FEBI BILSTEIN 173118 Sensor, exhaust pressure
Article number: 173118
compared to RRP £ 61,99

£ 43,41
price incl. 20% VAT, excl. delivery costs
Throttle position sensor BOSCH 0 280 122 001 cheap Sensors, relays, control units parts
Parts Details
  • BOSCH: Throttle position sensor
  • Item number: 0 280 122 001
  • Our price: £ 24,30
  • Condition: New
Details
BOSCH DKG-1 Throttle position sensor
Article number: 0 280 122 001
£ 24,30
price incl. 20% VAT, excl. delivery costs
Parking sensor VALEO 890000 cheap Sensors, relays, control units parts
Parts Details
  • Fitting Position: Front, Rear
  • Sensor Type: Ultrasonic Sensor
  • Product line: ORIGINAL PART
  • Chemical Properties: Paintable
  • Length [mm]: 41
  • Width [mm]: 22
  • Height [mm]: 26,3
  • Number of pins: 3
  • Diameter [mm]: 15,5
  • Weight [kg]: 0,03
  • VALEO: Parking sensor
  • Item number: 890000
  • Condition: New
Details
VALEO 890000 Parking sensor Front, Rear, Ultrasonic Sensor
Article number: 890000
£ 54,14
price incl. 20% VAT, excl. delivery costs
Pressure converter, turbocharger PIERBURG 7.00868.02.0 cheap Sensors, relays, control units parts
Parts Details
  • Operating Mode: Electric-pneumatic
  • Voltage [V]: 12
  • PIERBURG: Pressure converter, turbocharger
  • Item number: 7.00868.02.0
  • Our price: £ 43,21
  • Condition: New
Details
PIERBURG 7.00868.02.0 Pressure converter, turbocharger Electric-pneumatic
Article number: 7.00868.02.0
£ 43,21
price incl. 20% VAT, excl. delivery costs
-68%
ABS sensor ring FEBI BILSTEIN 100751 cheap Sensors, relays, control units parts
Parts Details
  • Inner Diameter [mm]: 72
  • Material: Steel
  • Number of Teeth, ABS ring: 48
  • Fitting Position: Front Axle Left, Front Axle Right
  • Weight [kg]: 0,050
  • Observe service information
  • Diameter [mm]: 81,5
  • FEBI BILSTEIN: ABS sensor ring
  • Item number: 100751
  • Condition: New
Details
FEBI BILSTEIN 100751 ABS sensor ring Front Axle Left, Front Axle Right
Article number: 100751
compared to RRP £ 23,99

£ 7,47
price incl. 20% VAT, excl. delivery costs
Fuel pressure sensor BOSCH 0 261 230 414 cheap Sensors, relays, control units parts
Parts Details
  • Supplementary Article / Supplementary Info Info 2: Low Pressure Side
  • Fuel Mixture Formation: Manifold Injection / Direct Injection
  • BOSCH: Fuel pressure sensor
  • Item number: 0 261 230 414
  • Our price: £ 31,03
  • Condition: New
Details
BOSCH DS-M1-F Fuel pressure sensor Low Pressure Side
Article number: 0 261 230 414
£ 31,03
price incl. 20% VAT, excl. delivery costs

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