Mercedes-Benz C55 AMG EGR Vacuum Modulator Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(10)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(10)

EGR Vacuum Modulator Replacement Service

How much does a EGR Vacuum Modulator Replacement cost?

On average, the cost for a Mercedes-Benz C55 AMG EGR Vacuum Modulator Replacement is $212 with $96 for parts and $115 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2006 Mercedes-Benz C55 AMGV8-5.5LService typeEGR Vacuum Modulator ReplacementEstimate$329.91Shop/Dealer Price$401.12 - $562.76
2005 Mercedes-Benz C55 AMGV8-5.5LService typeEGR Vacuum Modulator ReplacementEstimate$307.91Shop/Dealer Price$379.17 - $540.85
Show example Mercedes-Benz C55 AMG 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.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(10)

Rating Summary
10
0
0
0
0
10
0
0
0
0

Damian

11 years of experience
465 reviews
Damian
11 years of experience
Mercedes-Benz C55 AMG V8-5.5L - Trunk Latch Adjustment - Washington, District of Columbia
Great job, excellent customer service.

Faraz

22 years of experience
84 reviews
Faraz
22 years of experience
Mercedes-Benz C55 AMG V8-5.5L - Coolant Reservoir - Dublin, California
Request Faraz you won’t regret it!!

Matthew

17 years of experience
53 reviews
Matthew
17 years of experience
Mercedes-Benz C55 AMG V8-5.5L - Alternator - Kansas City, Missouri
AAA first class job. On time for complicated job, completed within estimate. couldn't be happier.

Pardeep

21 years of experience
1121 reviews
Pardeep
21 years of experience
Mercedes-Benz C55 AMG V8-5.5L - Control Arm Assembly Replacement (Front Upper Left, Front Upper Right, Front Lower Left, Front Lower Right) - San Jose, California
Friendly and fast - new control arms were mounted and now my clunking issue is gone. Very happy!

Excellent Rating

(10)

Rating Summary
10
0
0
0
0
10
0
0
0
0
Number of Mercedes-Benz C55 AMG services completed
110+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

Symptoms of a Bad or Failing Hatch Lock Cylinder
Common signs include the hatch lock cylinder just spinning or not turning at all when you insert the key, and the key not even being able to go in.
Cell Phones and Texting: Distracted Driving Laws in North Carolina
North North Carolina defines distracted driving as times when the driver’s attention is away from the primary task of driving. Distractions are broken down into four categories, which are visual, auditory, manual, and cognitive. Some common distractions include: Cell phones...
How to Prepare for the New Mexico Driver’s Written Test
Before Before you can take your road test to get your license in New Mexico, you need to make sure you have your learner’s permit. The only way to get the permit is to pass the state’s written test. The...

oil inside spark plug chamber and clicking/ticking

Hello - oil is leaking from the valve cover, down into the spark plug recesses as you noticed. This causes the spark plugs to short, creating the misfire you have experienced. No doubt some of this oil leaked into the...

Trouble starting car after refueling.

Your car has a small purge valve that controls the venting of fumes from the fuel tank as these fumes build up inside, particularly when you are refueling the car with gas. The EVAP system prevents fuel vapors from the...

2009 dodge caravan red lightning bolt and check engine light but checked codes with the key and not reading any codes

Hi Corey. Thanks for contacting us today. The red lightning bolt warning light indicates an issue with the charging system. In order to download the codes, you'll need a professional digital scanner. If you'd like to have one of our...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (844) 997-3624 · hi@yourmechanic.com