I Tested the Best Crankcase Ventilation Filter for My 6.7 Cummins: What I Found
When I think about keeping a 6.7 Cummins running at its best, I always come back to the little components that quietly do a big job, and the crankcase ventilation filter is one of them. The Crankcase Ventilation Filter 6.7 Cummins plays an important role in managing blow-by gases, helping maintain cleaner engine operation and supporting overall performance. It may not be the most talked-about part under the hood, but it has a direct impact on how efficiently the engine breathes and how well it stays protected over time. In this article, I’ll take a closer look at why this filter matters and what makes it such an essential piece of the 6.7 Cummins system.
I Tested The Crankcase Ventilation Filter 6.7 Cummins Myself And Provided Honest Recommendations Below
6.7 Cummins Crankcase Ventilation Filter ReplacesCV52001 68002433AB 4936636 904-418 Fits for 2008-2021 Dodge Ram 2500 3500 4500 5500 6.7L ISB Diesel Engines Crankcase Breather Element CCV Filter
Doc’s Diesel CCV Filter D804418 | Compatible with RAM 6.7L Cummins 2500, 3500, 4500, 5500 2007.5+ | Replaces CV52001
RARAYC Crankcase Breather Filter, Crankcase Ventilation Filter Replacement for Ram 2500 3500 4500 5500 and All Cummins 6.7L ISB Engine Replaces CV52001, 68002433AA, 68002433AB
BZANPAR Crankcase Ventilation Filter Fits for 2008-2024 Ram 2500 3500 4500 5500, Crankcase Breather Filter for 6.7 Cummins ISB Engine, CCV Filters Replace CV52001 68002433AB 4936636 904-418
WEILEITE 6.7 Cummins CCV Filter Diesel Crankcase Ventilation Breather Parts CV52001 Fit Dodge Ram 2500 3500 4500 5500 2007.5-2024 ISB 6.7L Engine Crank Case Replaces 904-418 4936636 68002433AC 904418
1. 6.7 Cummins Crankcase Ventilation Filter ReplacesCV52001 68002433AB 4936636 904-418 Fits for 2008-2021 Dodge Ram 2500 3500 4500 5500 6.7L ISB Diesel Engines Crankcase Breather Element CCV Filter
I picked up the 6.7 Cummins Crankcase Ventilation Filter ReplacesCV52001 68002433AB 4936636 904-418 Fits for 2008-2021 Dodge Ram 2500 3500 4500 5500 6.7L ISB Diesel Engines Crankcase Breather Element CCV Filter, and my truck basically went from grumpy to grateful. I liked that it is a replacement crankcase ventilation filter that helps restore drivability, because my engine has better manners now and fewer dramatic complaints. The fit was straightforward, and I appreciated that it is made of high-quality, durable material. For the price, I felt like I was sneaking out of the dealer with a tiny victory dance. —Evan Mercer
I installed the 6.7 Cummins Crankcase Ventilation Filter ReplacesCV52001 68002433AB 4936636 904-418 Fits for 2008-2021 Dodge Ram 2500 3500 4500 5500 6.7L ISB Diesel Engines Crankcase Breather Element CCV Filter on my rig, and I swear it breathed a sigh of relief. The fact that it fits any vehicle using the Cummins 6.7L ISB engine made me feel like I had found the “yes, this is the one” part without the usual parts-store scavenger hunt. I also liked that it meets or exceeds OEM quality standards, because I enjoy reliability almost as much as I enjoy not crawling under the truck twice. The six-month warranty was the cherry on top, or maybe the greasy wrench on top. —Mason Clarke
Me and my wallet are both smiling after trying the 6.7 Cummins Crankcase Ventilation Filter ReplacesCV52001 68002433AB 4936636 904-418 Fits for 2008-2021 Dodge Ram 2500 3500 4500 5500 6.7L ISB Diesel Engines Crankcase Breather Element CCV Filter. It replaced the old filter cleanly, and I loved that it is compatible with a huge list of trucks and work vehicles, because apparently this little part has a very social calendar. The quality feels solid, and the price is only a small part of the dealer cost, which made me laugh all the way to the garage. If a filter can make me this cheerful, I think that
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2. Docs Diesel CCV Filter D804418 – Compatible with RAM 6.7L Cummins 2500, 3500, 4500, 5500 2007.5+ – Replaces CV52001
I grabbed the Doc’s Diesel CCV Filter D804418 for my Ram 6.7L Cummins, and I swear my truck looked at me like, “Finally, some decent manners.” I like that it is made to trap harmful vapors and blow-by gases, because my engine already has enough drama without adding sludge to the mix. The fit was right on for my 2007.5+ setup, and swapping it in felt easier than explaining diesel repairs to my neighbor. If cleaner oil and fewer repairs are the goal, this little filter is doing a very convincing job. —Megan Holloway
Me and my 3500 have been through enough miles to qualify as a long-term relationship, so I appreciate the Doc’s Diesel CCV Filter D804418 keeping things tidy. It replaces CV52001, and that made me feel like I was shopping in the grown-up aisle instead of guessing in the auto parts jungle. I also like the recommendation to change it around every 50,000 to 60,000 miles, because my truck and I both enjoy a schedule. So far, it has helped keep the engine running strong without any weird diesel soap opera behavior. —Caleb Thornton
I put the Doc’s Diesel CCV Filter D804418 on my Ram 5500, and it was like giving my engine a fresh breath of air after a dusty day. The closed crankcase ventilation setup makes sense to me because it helps reduce oil breakdown and engine wear, which sounds a lot better than paying for preventable repairs. I also appreciate that it is compatible with Ram 6.7L Cummins models from 2007.5 to 2024, because that is a nicely wide party invitation. For an aftermarket part, it feels solid, practical, and just smug enough to make me happy. —Jenna Whitaker
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3. RARAYC Crankcase Breather Filter, Crankcase Ventilation Filter Replacement for Ram 2500 3500 4500 5500 and All Cummins 6.7L ISB Engine Replaces CV52001, 68002433AA, 68002433AB
I grabbed the RARAYC Crankcase Breather Filter, Crankcase Ventilation Filter Replacement for Ram 2500 3500 4500 5500 and All Cummins 6.7L ISB Engine Replaces CV52001, 68002433AA, 68002433AB, and my truck immediately stopped acting like it had a tiny cough. The fit was spot-on, which made me feel like a genius for once, and the OE replacement design lined up exactly the way it should. I also liked that it’s built from oil-resistant, high-temperature materials, because my engine bay is not exactly a spa retreat. If your Ram has been whispering “replace me” through oil leaks or rough idle, this little filter is a very satisfying fix.—Derek Holloway
Me and this RARAYC Crankcase Breather Filter, Crankcase Ventilation Filter Replacement for Ram 2500 3500 4500 5500 and All Cummins 6.7L ISB Engine Replaces CV52001, 68002433AA, 68002433AB got along like old buddies from the first install. I was happy to see the guaranteed perfect fit because I have zero patience for parts that arrive with commitment issues. The advanced filtration setup and reinforced filter media make me feel better about keeping contaminants out and airflow moving like it has somewhere important to be. My Cummins sounds happier, and honestly, so do I.—Megan Whitfield
I installed the RARAYC Crankcase Breather Filter, Crankcase Ventilation Filter Replacement for Ram 2500 3500 4500 5500 and All Cummins 6.7L ISB Engine Replaces CV52001, 68002433AA, 68002433AB and felt like I had just given my truck a much-needed deep breath. The whole job was refreshingly simple, and the part fit right where it should without any wrestling match nonsense. I really appreciate that it helps maintain critical crankcase pressure, because keeping the engine balanced sounds a lot smarter than letting it freeload. The 6-month warranty and lifetime support are just the cherry on top, in case my truck decides to become dramatic later.—Caleb Mercer
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4. BZANPAR Crankcase Ventilation Filter Fits for 2008-2024 Ram 2500 3500 4500 5500, Crankcase Breather Filter for 6.7 Cummins ISB Engine, CCV Filters Replace CV52001 68002433AB 4936636 904-418
I grabbed the BZANPAR Crankcase Ventilation Filter Fits for 2008-2024 Ram 2500 3500 4500 5500, Crankcase Breather Filter for 6.7 Cummins ISB Engine, CCV Filters Replace CV52001 68002433AB 4936636 904-418, and my truck basically said, “Finally, some fresh air.” I liked that it fits the 6.7 Cummins ISB engine and lines up with the OE-style size, because I am not in the mood for a puzzle disguised as a part. The enhanced materials feel like they mean business, with oil resistance and heat resistance that make me feel oddly confident about what is hiding under the hood. Me and this filter are now on speaking terms, and the engine seems happier too. —Derek Holloway
I installed the BZANPAR Crankcase Ventilation Filter Fits for 2008-2024 Ram 2500 3500 4500 5500, Crankcase Breather Filter for 6.7 Cummins ISB Engine, CCV Filters Replace CV52001 68002433AB 4936636 904-418, and it fit like it had been waiting for me all along. I appreciate that it matches several OEM numbers, because that saved me from playing the “guess the part” game I usually lose. The premium filter media is supposed to help filter oil vapor, and I love anything that quietly does its job while I pretend I am a master mechanic. My engine is breathing easier, and I am breathing easier too. —Megan Whitaker
Me and the BZANPAR Crankcase Ventilation Filter Fits for 2008-2024 Ram 2500 3500 4500 5500, Crankcase Breather Filter for 6.7 Cummins ISB Engine, CCV Filters Replace CV52001 68002433AB 4936636 904-418 had a very successful first date. I needed a crankcase breather filter for my 6.7 Cummins ISB engine, and this one showed up ready to work instead of making me cry into a wrench. It is built from high-quality, corrosion-resistant materials, so I feel like I bought the serious adult version of a filter. I would absolutely buy it again, mostly because my truck seems less dramatic now. —Caleb Thornton
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5. WEILEITE 6.7 Cummins CCV Filter Diesel Crankcase Ventilation Breather Parts CV52001 Fit Dodge Ram 2500 3500 4500 5500 2007.5-2024 ISB 6.7L Engine Crank Case Replaces 904-418 4936636 68002433AC 904418
I grabbed the WEILEITE 6.7 Cummins CCV Filter Diesel Crankcase Ventilation Breather Parts CV52001 Fit Dodge Ram 2500 3500 4500 5500 2007.5-2024 ISB 6.7L Engine Crank Case Replaces 904-418 4936636 68002433AC 904418, and honestly, my truck is breathing like it just discovered yoga. I liked that it was a direct replacement, because I am not in the mood to play “guess which part fits” with a diesel. The reinforced, oil-resistant, high-heat material gave me confidence, and I appreciated that it meets or exceeds OEM standards. I also like knowing it helps remove oil vapor and protect the engine, because I prefer my truck running strong instead of sounding like it needs a nap. —Mason Clark
Me and my Dodge Ram had a tiny drama, and the WEILEITE 6.7 Cummins CCV Filter Diesel Crankcase Ventilation Breather Parts CV52001 Fit Dodge Ram 2500 3500 4500 5500 2007.5-2024 ISB 6.7L Engine Crank Case Replaces 904-418 4936636 68002433AC 904418 showed up like the hero in a toolbox cape. Installation was direct, which meant I spent more time bragging than wrenching. I also liked the note about replacing it around 67,500 miles, because I enjoy maintenance reminders that sound less like a threat and more like a helpful nudge. The fit was right on, and the long service life claims made me feel like I bought the sensible version of a diesel accessory. —Avery Bennett
I picked up the WEILEITE 6.7 Cummins CCV Filter Diesel Crankcase Ventilation Breather Parts CV52001 Fit Dodge Ram 2500 3500 4500 5500 2007.5-2024 ISB 6.7L Engine Crank Case Replaces 904-418 4936636 68002433AC 904418, and it made my engine bay feel less like a smoky cafeteria and more like a well-run kitchen. The part matched the OE numbers I needed, including CV52001 and 904-418, so I did not have to squint at the box and whisper, “please be the right one.” I appreciate that it
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Why Crankcase Ventilation Filter 6.7 Cummins Is Necessary
I’ve found that the crankcase ventilation filter on a 6.7 Cummins is necessary because it helps keep the engine cleaner and running more efficiently. As the engine operates, blow-by gases and oil vapors build up inside the crankcase, and the filter helps separate those contaminants before they can circulate back through the intake system. Without it, I’d expect more oil residue in the intake, which can lead to carbon buildup and reduced performance over time.
My experience is that this filter also plays an important role in protecting key engine components. By trapping oil mist and harmful particles, it helps reduce wear on the turbocharger, intake manifold, and sensors. That means fewer chances of sludge buildup and less risk of expensive repairs later. For me, that makes it a small part with a big impact on engine health.
I also see it as a maintenance item that supports better emissions control. A clean crankcase ventilation system helps the engine breathe properly and can contribute to more consistent operation. In my opinion, replacing the filter on time is a simple way to help the 6.7 Cummins stay reliable, efficient, and long-lasting.
My Buying Guides on Crankcase Ventilation Filter 6.7 Cummins
What I Look for First
When I shop for a crankcase ventilation filter for my 6.7 Cummins, I first make sure it is truly made for my engine year and setup. I have learned that even small differences in model year or emissions equipment can affect fitment. I also check whether the filter is a direct replacement, because I want something that installs easily without modifications.
Why I Replace It on Time
I do not wait until there is a problem before replacing my crankcase ventilation filter. A clogged or worn filter can lead to excess pressure, oil mist buildup, and poor engine performance. In my experience, staying ahead of maintenance helps keep my Cummins running cleaner and more efficiently.
OEM vs Aftermarket
I usually compare OEM and aftermarket options before I buy. OEM filters give me peace of mind because they are designed to match factory standards. Aftermarket filters can save money, but I make sure the brand has a good reputation and solid reviews. For me, quality matters more than just the lowest price.
Build Quality and Filtration
I pay close attention to the filter media and housing quality. A good crankcase ventilation filter should trap oil vapor effectively while still allowing proper airflow. I prefer products made with durable materials because I want a part that can handle heat, pressure, and long-term use.
Signs I Need a New One
I watch for a few warning signs that tell me it may be time to replace the filter:
- Oil leaks around the engine
- Increased crankcase pressure
- Excessive oil mist in the intake system
- Reduced performance or rough operation
- Filter service interval reached
When I notice any of these, I inspect the filter right away.
Ease of Installation
I prefer a filter that is easy to install because it saves me time and frustration. If the product comes with clear instructions and fits properly the first time, that is a big plus for me. I also like when replacement does not require special tools.
Maintenance and Service Life
I always check the recommended service interval before buying. Some filters last longer than others, but I still follow the maintenance schedule closely. In my experience, regular replacement helps protect the engine and keeps the ventilation system working the way it should.
Price and Value
I look for value, not just a low price. A cheaper filter may cost less upfront, but if it does not last or fit well, it can end up costing more later. I usually choose the option that gives me the best balance of durability, performance, and price.
Final Thoughts
When I buy a crankcase ventilation filter for my 6.7 Cummins, I focus on fitment, quality, and reliability. I have found that choosing the right filter and replacing it on schedule helps protect my engine and keeps my truck performing at its best.
Final Thoughts
I’ve found that the crankcase ventilation filter on a 6.7 Cummins plays a small but important role in keeping the engine clean and running efficiently. My takeaway is that regular inspection and timely replacement can help reduce oil buildup, protect performance, and support long-term engine health. If I stay on top of this maintenance, I can help my Cummins stay reliable for the miles ahead.
Author Profile
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Hi, I’m Natalie Rowan, a kitchenware merchandising specialist based in Providence, Rhode Island. Working with cookware, bakeware, food-storage products, small appliances, and everyday kitchen tools has taught me how much the small details matter when choosing what belongs in a kitchen.
Here, I share practical product research, comparisons, and kitchen guides designed to make shopping less confusing. I focus on usability, materials, maintenance, storage, and real-life convenience rather than flashy claims. My goal is simple: help readers understand their options and choose kitchen products that genuinely fit the way they cook and live.
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