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Sensors

Today's automobiles rely on numerous sensors to maintain the performance of the engine and check many safety functions. Sensors provide real-time data to the engine control unit (ECU), ensuring everything from fuel efficiency to emissions compliance operates as it was designed. At Wilmink Engine Parts, we offer a wide selection of reliable sensors from A brands that are suitable for all types of vehicles.

What types of sensors are used in current vehicles?

Most are used in the powertrain. Open up the latest shop manuals and you'll see sensors packed around the engine, emissions, and fuel systems. These can include:

  1. Crankshaft Position Sensor – Controls ignition and fuel injection timing.
  2. Camshaft Position Sensor – Provides information about the position of the camshaft in relation to the crankshaft.
  3. Coolant Temperature Sensor – There are several types, for example, to transmit the coolant temperature to the temperature gauge, but also to the ECU.
  4. Accelerator Pedal Position Sensor – Checks the position of the accelerator pedal in relation to the throttle valve.
  5. Exhaust Gas Pressure Sensor – Used in emission control systems to monitor turbo or DPF function.
  6. Fuel Level Sender Unit – Measures fuel level for the fuel gauge on the dashboard.
  7. Lambda Sensor – Measures exhaust oxygen content to regulate air-fuel ratio.
  8. Knock Sensor – Detects detonation or knocking and signals of the engine to the ECU to adjust ignition timing.
  9. MAF / MAP Sensor – Monitors air intake flow or pressure for precise fuel delivery.
  10. Oil Pressure Sensor – Monitors lubrication pressure to prevent engine damage.


How can you tell if a car sensor is bad?

A faulty sensor can cause a range of engine issues. Here are some common signs:

SymptomPossible Sensor Involved
Engine misfiring or stalling Crankshaft/Camshaft sensor
Poor fuel economy O2 sensor, MAF sensor
Check engine light on Any engine sensor (especially O2 or knock sensor)
Hard starting Coolant temp sensor, crankshaft sensor
Reduced engine performance MAP, MAF, knock, or lambda sensor

When these issues occur, diagnostic tools like OBD-II scanners and specialized tools like multimeters and scopes can help identify which sensor needs replacement. Using OE-quality replacement parts ensures consistent performance.


What are oxygen and O2 sensors in a car?

Oxygen sensors (also known as O2 sensors or lambda sensors) measure the oxygen content in the exhaust gases. This data is sent to the ECU to help adjust the air-fuel ratio. A correct ratio ensures optimal combustion, fuel efficiency, and reduced emissions.

Wilmink Engine Parts offers high-quality oxygen and lambda sensors for a wide range of vehicles, including aftermarket and OE replacements from trusted brands.


What is a knock sensor in a car?

A knock sensor detects engine knock (also called detonation or pinging) caused by premature fuel combustion. This sensor sends a signal to the ECU to adjust the ignition timing and prevent engine damage.
When a knock sensor fails, the engine may run roughly, lose power, or display a check engine light. Replacement with an OEM-quality part is essential for maintaining ignition timing and protecting engine components.


What parts are related to sensors?

Wilmink Engine Parts stocks a full range of engine sensors, including options from trusted names such as:

  1. MAHLE
  2. Pierburg
  3. Delphi
  4. Wagner

Wilmink offers private label sensor options, which meet OE specifications and are thoroughly tested for quality and reliability.

While replacing sensors, we recommend inspecting related systems like fuel injection, crankshaft assemblies, or exhaust components. You can explore those categories directly in our webshop:

For more information or product support, reach out to our specialists at sales@wilminkgroup.com.

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