How to Replace an Exhaust Gas Recirculation (EGR) Vacuum Modulator

Schedule EGR Vacuum Modulator Replacement
Service Area

$119.57 - $226.17

Price range for all vehicles
Average rating from 126,673 customers who received a EGR Vacuum Modulator Replacement.

The exhaust gas recirculation (EGR) system introduces exhaust gases to the engine combustion chamber to lower temperatures. This helps to reduce oxides of nitrogen (NOx) emissions, which are smog-forming pollutants.

The heart of the EGR system is the EGR valve, which can be either electronic or vacuum controlled. The EGR valve is used to meter exhaust gases into the engine. On some systems, the EGR valve is regulated by a vacuum modulator. The modulator precisely controls the strength of the vacuum signal to the EGR valve by referencing exhaust back pressure or engine load.

The typical symptoms of a bad EGR vacuum modulator include stalling, surging, rough idle, increased emissions, and an illuminated check engine light. If you notice any of these symptoms, you may have to replace the EGR vacuum modulator.

Part 1 of 2: Locate and remove the EGR vacuum modulator

In order to safely and efficiently replace your EGR vacuum modulator, you will need a couple of basic tools:

Materials Needed

  • EGR vacuum modulator
  • Free repair manuals - Autozone
  • Protective gloves
  • Repair manuals (optional) - Chilton
  • Safety glasses

locating the EGR vacuum modulator

Step 1: Locate the EGR vacuum modulator. The modulator is typically mounted near the EGR valve on the intake manifold.

modulator with labeled ports

Step 2: Disconnect the modulator vacuum hoses. Typically, the modulator will have labeled ports. Label the vacuum hoses for reference during installation of the new modulator.

Disconnect the vacuum hoses by carefully sliding them off the connections.

removing the modulator from its mounting clips

Step 3: Remove the modulator from its mounting clips. Pull the mounting bracket clips apart and remove the modulator.

Part 2 of 2: Install the EGR vacuum modulator

installing the new modulator

Step 1: Install the new modulator. Install the new modulator in the mounting clips.

tightening down the fasteners

Step 2: Put back the vacuum hoses. Reinstall the vacuum hoses in the exact order in which they were removed.

If you are not comfortable with performing this process on your own, get a certified technician from YourMechanic to replace the EGR vacuum for you.


Next Step

Schedule EGR Vacuum Modulator Replacement

The most popular service booked by readers of this article is EGR Vacuum Modulator Replacement. Yourmechanic’s technicians bring the dealership to you by performing this job at your home or office 7 days a week between 7AM-9PM. We currently cover over 10k cities and have 100k+ 5-star reviews... LEARN MORE

SEE PRICING & SCHEDULING

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Recent EGR Vacuum Modulator Replacement reviews

Excellent Rating


YourMechanic EGR Vacuum Modulator Replacement Service

Average Rating

4.9/5

Number of Reviews

126,673

Rating Summary
118,186
4,743
947
657
2,140
118,186
4,743
947
657
2,140

Jose

9 years of experience
285 reviews
Jose
9 years of experience
Honda CR-V - Cooling/Radiator Fan Motor - Tampa, Florida
Professional and very knowledgeable. A great mechanic.
BMW X3 - Alternator - Saint Petersburg, Florida
Great mechanic!

Richard

12 years of experience
601 reviews
Richard
12 years of experience
Ford Escape - Serpentine/Drive Belt - Henderson, Nevada
Richard was on time, he was professional, and got the job done quickly.

Brikk

17 years of experience
385 reviews
Brikk
17 years of experience
Nissan Altima - Pre-purchase Car Inspection - Matthews, North Carolina
Brikk completed a pre-purchase inspection for me and I found him to be extremely professional and courteous.

Peter

42 years of experience
1270 reviews
Peter
42 years of experience
Mazda MPV - Car is not starting - Chandler, Arizona
Awesome guy. He really knows his business, went right to the problem, that I had ruled out by a visual inspection.

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE