Mercedes-Benz E350 EGR Vacuum Modulator Replacement at your home or office.

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EGR Vacuum Modulator Replacement Service

How much does a EGR Vacuum Modulator Replacement cost?

On average, the cost for a Mercedes-Benz E350 EGR Vacuum Modulator Replacement is $201 with $96 for parts and $104 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2009 Mercedes-Benz E350V6-3.5LService typeEGR Vacuum Modulator ReplacementEstimate$318.91Shop/Dealer Price$386.27 - $545.02
2012 Mercedes-Benz E350V6-3.5LService typeEGR Vacuum Modulator ReplacementEstimate$296.91Shop/Dealer Price$364.30 - $523.08
2013 Mercedes-Benz E350V6-3.0L Turbo DieselService typeEGR Vacuum Modulator ReplacementEstimate$296.91Shop/Dealer Price$364.30 - $523.08
2013 Mercedes-Benz E350V6-3.5LService typeEGR Vacuum Modulator ReplacementEstimate$296.91Shop/Dealer Price$364.25 - $523.00
2007 Mercedes-Benz E350V6-3.5LService typeEGR Vacuum Modulator ReplacementEstimate$296.91Shop/Dealer Price$364.33 - $523.13
2008 Mercedes-Benz E350V6-3.5LService typeEGR Vacuum Modulator ReplacementEstimate$296.91Shop/Dealer Price$364.30 - $523.08
2011 Mercedes-Benz E350V6-3.5LService typeEGR Vacuum Modulator ReplacementEstimate$302.41Shop/Dealer Price$369.54 - $528.12
2006 Mercedes-Benz E350V6-3.5LService typeEGR Vacuum Modulator ReplacementEstimate$302.41Shop/Dealer Price$370.25 - $529.37
Show example Mercedes-Benz E350 EGR Vacuum Modulator Replacement prices

What is the EGR Vacuum Modulator all about?

Your vehicle’s exhaust gas recirculation (EGR) system is used to reduce your engine’s emissions by lowering the combustion chamber temperature. This produces less nitrous oxides, and burns pollutants contained in the exhaust gas that are reintroduced into the intake manifold. If the EGR valve opens and allows exhaust gases into the intake, the engine runs more smoothly and efficiently. However, this is not the case at idle, when the engine needs the most vacuum for proper operation.

If the EGR valve opens at idle, you can experience a rough idle and possibly a knock. Engine power is negatively affected at low RPM’s. Engineers implemented a control that closes the EGR valve when the engine is running at lower RPM’s. The engine produces lower vacuum at lower engine speeds, so it’s natural that the control is modulated by the engine’s own vacuum. The EGR vacuum modulator is a diaphragm that closes when the engine vacuum drops to idle, and opens as soon as the vacuum increases. It’s also known as a vacuum modulated valve. If the EGR vacuum modulator is leaking vacuum, is blocked internally, or is leaking, the Check Engine light will come on and the engine may start to knock.

Keep in mind:

  • The EGR system assists in reducing engine emissions. An improperly operating EGR system can cause a smog test failure.
    • Vacuum hoses become brittle over time. Take precautions to not damage the vacuum hoses when working on the EGR system.

How it's done:

  • The EGR vacuum modulator is verified that it needs to be replaced. The engine top trim cover is removed to access the modulator.

  • The defective EGR vacuum modulator is removed from the bracket near the EGR valve and is disconnected.

  • The new EGR vacuum modulator is installed and reconnected.

  • The engine is started and the EGR vacuum modulator is tested for computer codes and operation.

  • The vehicle is road tested to ensure proper operation of the EGR vacuum modulator.

Our recommendation:

The EGR vacuum modulator does not have a replacement interval. It will likely need replacement at some time because it does contain a filter. It can be inspected any time a vacuum test needs to be performed on the engine vacuum. If the EGR vacuum modulator is deemed to be faulty, you will need to have it replaced by one of our expert technicians.

What common symptoms indicate you may need to replace the EGR Vacuum Modulator?

  • Check Engine light is on
  • Engine knock at idle
  • Engine idles rough

How important is this service?

The EGR system partly controls your vehicle’s emissions, and a faulty EGR vacuum modulator can cause your car to fail a smog test. In addition, your vehicle may not idle, or may knock at idle. It is recommended to replace a faulty EGR vacuum modulator as soon as possible.

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Rating Summary
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Richard

11 years of experience
265 reviews
Richard
11 years of experience
Mercedes-Benz E350 V6-3.5L - Alternator - Nashville, Tennessee
great mechanic!!!

David

13 years of experience
424 reviews
David
13 years of experience
Mercedes-Benz E350 V6-3.5L - Headlight Bulb Replacement (Driver Side Low Beam) - Marietta, Georgia
Very professional & quick service!

Kiri

20 years of experience
372 reviews
Kiri
20 years of experience
Mercedes-Benz E350 V6-3.5L - Brake Rotor/Disc Replacement (Front, Rear) - Blue Bell, Pennsylvania
Kiri has worked on my Mercedes 3 times now. He is amazing -- organized, knows what he is doing and very careful. I recommend him without reservation.

Cody

8 years of experience
99 reviews
Cody
8 years of experience
Mercedes-Benz E350 V6-3.5L - Brake Pads Replacement (Front) - Arlington, Texas
Arrived as scheduled, knocked the work out quickly

Excellent Rating

(471)

Rating Summary
439
15
6
1
10
439
15
6
1
10
Number of Mercedes-Benz E350 services completed
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