BMW 325i Crankcase Vent Filter Replacement at your home or office.

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Crankcase Vent Filter Replacement Service

How much does a Crankcase Vent Filter Replacement cost?

On average, the cost for a BMW 325i Crankcase Vent Filter Replacement is $183 with $88 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2003 BMW 325iL6-2.5LService typeCrankcase Vent Filter ReplacementEstimate$337.27Shop/Dealer Price$405.84 - $556.43
1994 BMW 325iL6-2.5LService typeCrankcase Vent Filter ReplacementEstimate$271.27Shop/Dealer Price$332.87 - $478.23
2004 BMW 325iL6-2.5LService typeCrankcase Vent Filter ReplacementEstimate$309.27Shop/Dealer Price$377.88 - $528.50
1989 BMW 325iL6-2.5LService typeCrankcase Vent Filter ReplacementEstimate$271.27Shop/Dealer Price$332.83 - $478.16
1995 BMW 325iL6-2.5LService typeCrankcase Vent Filter ReplacementEstimate$271.27Shop/Dealer Price$332.90 - $478.28
1990 BMW 325iL6-2.5LService typeCrankcase Vent Filter ReplacementEstimate$271.27Shop/Dealer Price$332.87 - $478.23
1991 BMW 325iL6-2.5LService typeCrankcase Vent Filter ReplacementEstimate$276.27Shop/Dealer Price$337.63 - $482.81
1992 BMW 325iL6-2.5LService typeCrankcase Vent Filter ReplacementEstimate$276.27Shop/Dealer Price$338.29 - $483.95
Show example BMW 325i Crankcase Vent Filter Replacement prices

What is the Crankcase Vent Filter all about?

The most common application for the crankcase vent filter is on high performance engines such as race cars, though it is widely used on older models of vehicles as well. Inside the engine, small amounts of combustion gases push by the piston in the cylinder and enter the crankcase, or the bottom end of the engine. These gases create a positive pressure inside the crankcase, which needs ventilation. Positive crankcase pressure robs the engine of power as the pistons have to fight against that pressure when performing each down stroke.

A breather tube is mounted at the top of the crankcase in the engine block that releases the positive pressure into the environment or into the intake to cleanly burn them before they enter the atmosphere. The breather tube contains a port or elbow at some point along its route where the crankcase vent filter is installed. The crankcase vent filter allows excess pressure to push out into the environment without carrying oil particles or other messy contaminants with the gases. It also prevents any debris or dirt from entering the crankcase if there is a situation where negative pressure occurs, such as engine cooldown. If the crankcase vent filter is plugged, the excess positive pressure inside the crankcase can blow out engine oil seals. If the crankcase vent filter isn’t in place, dirt can enter the crankcase and plug oil galleries or contaminate the oil, which can cause lasting engine damage.

Keep in mind:

  • The crankcase vent filter works contrary to how other filters operate. Its main purpose is to prevent contaminants in the engine from entering the atmosphere, while most other filters prevent contaminants from entering the engine.

How it's done:

  • The crankcase vent filter is verified that it needs to be replaced. The air filter housing is then opened.
  • The defective crankcase vent filter is removed by disconnecting the vent hose and removing the clip.
  • The new crankcase vent filter is installed and secured with a clip. The vent hose is then connected.
  • The air cleaner housing is closed. The crankcase vent filter is then tested for operation.
  • The vehicle is road tested to ensure proper operation of the crankcase vent filter.

Our recommendation:

The crankcase vent filter will eventually become plugged with oil that is carried by the exiting vapor. It should be checked whenever the engine air filter is replaced, and should be replaced at least as often as the spark plugs. If you experience symptoms that may be related to the crankcase vent filter, have one of our expert technicians diagnose and replace the vent filter.

What common symptoms indicate you may need to replace the Crankcase Vent Filter?

  • Oil on the engine
  • Plugged filter causing engine seals to leak
  • Decrease in engine performance

How important is this service?

When the crankcase vent filter is plugged, engine oil will leak when seals are pushed out. If the vent filter is missing or broken, contaminants can enter the crankcase. If the vent filter is not in place, an oily mess can occur under your hood. It is prudent to replace the crankcase vent filter as soon as needed.

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John

20 years of experience
571 reviews
John
20 years of experience
BMW 325i L6-2.5L - Coolant Recovery Reservoir - Orlando, Florida
John is officially my mechanic. Always professional, on time, and does work in timely manner.

Joel

21 years of experience
987 reviews
Joel
21 years of experience
BMW 325i L6-3.0L - AC is not working - Jacksonville, Florida
What a great guy. He was very professional and went out of his way to make me understand the car and what was going on. I will definitely be a repeat customers.

Pardeep

21 years of experience
1085 reviews
Pardeep
21 years of experience
BMW 325i L6-3.0L - Brake Pads Replacement (Rear) - Sunnyvale, California
Fantastic job! Thank you!

Daniel

18 years of experience
64 reviews
Daniel
18 years of experience
BMW 325i L6-2.5L - Strut Assembly Replacement (Front) - Monroeville, Pennsylvania
Daniel showed up at the decided location in time and he finished the work very professionally within the decided time frame.

Excellent Rating

(444)

Rating Summary
422
13
4
3
2
422
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4
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2
Number of BMW 325i services completed
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