BMW 323is 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 BMW 323is EGR Vacuum Modulator Replacement is $191 with $96 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1999 BMW 323isL6-2.5LService typeEGR Vacuum Modulator ReplacementEstimate$307.41Shop/Dealer Price$373.02 - $530.46
1998 BMW 323isL6-2.5LService typeEGR Vacuum Modulator ReplacementEstimate$287.41Shop/Dealer Price$353.05 - $510.51
Show example BMW 323is 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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6,369
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6,369
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148

Edgar

25 years of experience
41 reviews
Edgar
25 years of experience
BMW 323is L6-2.5L - Brake Pads Replacement (Front, Rear) - South San Francisco, California

Brandon

15 years of experience
9 reviews
Brandon
15 years of experience
BMW 323is L6-2.5L - Window Motor / Regulator Assembly Replacement (Driver Side Front) - Louisville, Kentucky
Didn't bring enough tools.rest ok.

Luis

18 years of experience
329 reviews
Luis
18 years of experience
BMW 428i xDrive L4-2.0L Turbo - Brake Pads Replacement (Rear) - Franklin Lakes, New Jersey
Very nice job on my breaks. He let me know exactly what he did, what else to do later, and under what circumstances I need to be repair again. Finally, he helped me estimate the cost next time. Very professional, I am looking forward to the next cooperation.

Tinashe

13 years of experience
644 reviews
Tinashe
13 years of experience
BMW X3 L6-3.0L - Strut Assembly Replacement (Front) - Clarkston, Georgia
Tinashe was on time, he did fantastic work, and he completed it early. My car drives like new again. You can't ask for more.

Excellent Rating

(6,828)

Rating Summary
6,369
206
60
45
148
6,369
206
60
45
148
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services done by our mechanics
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