Mercedes-Benz S420 Camshaft Position Sensor Replacement at your home or office.

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Camshaft Position Sensor Replacement Service

How much does a Camshaft Position Sensor Replacement cost?

On average, the cost for a Mercedes-Benz S420 Camshaft Position Sensor Replacement is $151 with $56 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1997 Mercedes-Benz S420V8-4.2LService typeCamshaft Position Sensor ReplacementEstimate$227.57Shop/Dealer Price$273.22 - $370.78
1995 Mercedes-Benz S420V8-4.2LService typeCamshaft Position Sensor ReplacementEstimate$460.75Shop/Dealer Price$569.72 - $857.19
1994 Mercedes-Benz S420V8-4.2LService typeCamshaft Position Sensor ReplacementEstimate$460.75Shop/Dealer Price$569.72 - $857.19
1999 Mercedes-Benz S420V8-4.2LService typeCamshaft Position Sensor ReplacementEstimate$207.57Shop/Dealer Price$253.21 - $350.76
1996 Mercedes-Benz S420V8-4.2LService typeCamshaft Position Sensor ReplacementEstimate$207.57Shop/Dealer Price$253.27 - $350.88
1998 Mercedes-Benz S420V8-4.2LService typeCamshaft Position Sensor ReplacementEstimate$207.57Shop/Dealer Price$253.25 - $350.83
Show example Mercedes-Benz S420 Camshaft Position Sensor Replacement prices

What is the Camshaft Position Sensor all about?

The camshaft position sensor monitors the position of the camshaft and reports that data to the car’s onboard computer system. This computer system works with sensors and other devices to keep the engine running. With data from the camshaft position sensor (CPS), the fuel injectors know when to fire.

When the sensor malfunctions, the computer does not know when to fire the injectors and may not fire them at all. The faulty readouts may also throw off spark timing, which will affect the car’s fuel economy. This sensor is used in conjunction with the crankshaft position sensor to control ignition timing. It is common for heat and oil leaks to cause this sensor to fail, due to where the sensor is located.

Keep in mind:

  • Damage to the camshaft position sensor is often caused by oil leaks; if this is the case, you may need another part of your car replaced or repaired.
  • When the camshaft position sensor is replaced, the alignment of the timing belt should be monitored so that no fluids leak onto the position sensor mounting area.
  • Some camshaft position sensors will need to have their software updated when they are installed.
  • Timing belts, mass air flow sensors, and crankshaft position sensors can all trigger the trouble code for the camshaft position sensor.

How it's done:

  • Scan test computer for trouble codes.
  • Pinpoint tests as per flow charts.
  • Remove and replace Crankshaft Position Sensor.
  • Clear trouble codes.
  • Check for proper operation and test drive car.

Our recommendation:

The camshaft position sensor isn’t checked in most regular services, but your vehicle has warning signs for when the sensor begins to fail. Because it sends information to the camshaft, when the sensor begins to fail your engine will begin to have trouble. Your engine may have a hard time turning on, staying on, idling, or running smoothly. Your Check Engine warning light should illuminate as well.

What common symptoms indicate you may need to replace the Camshaft Position Sensor?

  • Car stalls or does not start.
  • Car struggles to accelerate (does not maintain speed).
  • Check Engine light is on.
  • Car misfires.
  • Car stumbles or sputters on startup.
  • Car runs poorly or runs rough.

How important is this service?

The camshaft position sensor provides valuable information about the camshaft position to the computer management system. The computer system uses the information from the position sensor to determine when to inject more fuel. Without the sensor’s information, the computer won’t inject fuel properly, and your vehicle will stall or sputter.

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Excellent Rating

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ALAA

37 years of experience
56 reviews
ALAA
37 years of experience
Mercedes-Benz S420 V8-4.2L - Thermostat - Sacramento, California
punctual and communicative. Works with you when things go wrong. would recommend.

Eric

15 years of experience
133 reviews
Eric
15 years of experience
Mercedes-Benz S420 V8-4.2L - Oil Change - Bowie, Maryland
Kept me informed for his arrival. Was very friendly.

Tam

22 years of experience
251 reviews
Tam
22 years of experience
Mercedes-Benz S420 V8-4.2L - Fuel Filter - San Francisco, California

Melvin

17 years of experience
221 reviews
Melvin
17 years of experience
Mercedes-Benz S420 V8-4.2L - Trunk does not lock or open - Atlanta, Georgia
I am a independent private driver, and my trunk, passenger doors, engine light, sunroof all began to malfunction at the same time on my s500 Mercedes Melvin came out in the cold and in 30 minutes knew exactly what all the problems were. His knowledge is superb! I will be using Mr Melvin again.

Excellent Rating

(13)

Rating Summary
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Number of Mercedes-Benz S420 services completed
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services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1000+
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