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Choosing the right air filter for an Infiniti G37 affects engine performance, fuel use, and longevity. The correct filter keeps contaminants out while allowing adequate airflow for reliable combustion and steady throttle response.This guide covers seven shortlisted air filters selected for fit and filtration performance. We evaluated each option on practical criteria like filtration efficiency, fitment accuracy, and durability to help you find the right replacement for your G37. Read on to see what mattered in our selection.
Looking for other parts? See all Infiniti G37 parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | BDFHYK Engine Air Filter (replaces A24278) |  |
| Most Popular A crowd favorite that many people choose with confidence | Rtunes Racing Universal Clamp-On Cone Air Filter (3.25" Inlet) |  |
| Best Quality Built to a higher standard if you want something more solid | Nissan Genuine Engine Air Filter Pair (16546-JK20A) |  |
| Best Budget The cheapest option that still gets the job done reliably | KAX Premium Engine Air Filter (CA6900) |  |
| Most Sold A high-volume bestseller chosen again and again | EPAuto CP743 Cabin Air Filter (replacement for Infiniti G37) |  |
| Best Value for Money The sweet spot between price and what you get | FRAM Extra Guard CA6900 Engine Air Filter |  |
| Best Overall The best all-around choice for most situations | BOSCH 6017C HEPA Cabin Air Filter |  |
1. BDFHYK Engine Air Filter (replaces A24278)
| Manufacturer | BDFHYK |
|---|---|
| Model | Engine Air Filter |
| Manufacturer Part Number | BD-05-11272 |
| OEM Part Number | A24278 |
This BDFHYK engine air filter is a direct replacement-style intake filter sold as compatible with Infiniti models in the G family and related Nissan platforms. It installs the same way as a factory replacement and is intended for routine maintenance to keep engine air clean and protect the intake system. Notable features include a replacement part number match (A24278) and customer feedback pointing to consistent fit and thicker filter media than some factory parts. In use it delivers straightforward benefits: easy installation, acceptable filtration for everyday driving, and good value for routine yearly or 12,000-mile service intervals. Limitations are that this is a standard paper-type replacement rather than a high-performance or reusable element, so it will need scheduled replacement rather than cleaning and reusing. Also compatibility must be confirmed against the exact G37 year and engine code before purchase to ensure a perfect fit.
Best for: Reliability-focused buyers who prioritize predictable, factory-quality maintenance parts and want a low-effort replacement that keeps engine intake protection current.
Less Ideal for: Drivers seeking reusable, high-flow performance filters or those wanting a long-term washable element should consider aftermarket performance brands instead.
- Matches manufacturer part number A24278 for straightforward fitment
- Easy, tool-light installation suitable for do-it-yourself maintenance
- Consistent fit and media thickness comparable to or slightly heavier than factory filters
- Strong customer feedback reporting reliable fit and performance
- Disposable paper-style element that must be replaced on schedule
- Not marketed as a performance or reusable filter option
Verdict A straightforward, reliability-oriented factory-style replacement for Infiniti G-series engines that offers good fit and value for routine service but is not a reusable performance upgrade.
2. Rtunes Racing Universal Clamp-On Cone Air Filter (3.25" Inlet)
| Brand | Rtunes Racing |
|---|---|
| Fit Type | Vehicle Specific Fit |
| Shape | Round |
| Position | Front |
This Rtunes Racing clamp-on cone replaces a straight-pipe intake filter with a dry, washable element that does not require oiling. It installs by clamping the reinforced rubber flange to a mating intake pipe and is available in several inlet diameters so you can pick the size that matches a modified or short-ram intake on an Infiniti G37. The standard-height cone balances airflow and filtration for daily driving while the stainless steel clamp and reinforced flange help maintain a tight seal under normal road vibration. Because the filter is dry and reusable it is simple to clean and swap during routine maintenance without messy oiling. Limitations to note for a G37: this is a universal clamp-on part rather than a vehicle-specific boxed filter, so it only fits G37 setups with a straight, exposed intake pipe and you may need to check clearance in tight engine bays or airboxed systems. Fit depends on matching inlet diameter carefully and the rubber flange may compress over time under heavy use.
Best for: Convenience-driven buyers who want an easy-to-install, low-maintenance reusable filter for a modified Infiniti G37 intake and prefer quick cleaning over oil-based filters.
Less Ideal for: Drivers who keep the G37’s factory airbox intact or who want a guaranteed direct-fit factory-quality replacement should choose a vehicle-specific boxed filter instead.
- Dry, washable filter media eliminates the need for oiling and simplifies cleaning.
- Multiple inlet size options let you match a variety of aftermarket straight intake pipes on the G37.
- Stainless steel clamp and reinforced rubber flange provide a secure, vibration-resistant seal in typical driving conditions.
- Universal clamp-on design requires a compatible straight-pipe intake and is not a direct factory-box replacement for the G37.
- May require careful measuring for clearance and inlet size to avoid fitment issues in some engine bays.
Verdict A budget-friendly, easy-to-clean clamp-on cone for G37 owners with a straight aftermarket intake pipe, but not a substitute for a boxed vehicle-specific filter.
3. Nissan Genuine Engine Air Filter Pair (16546-JK20A)
| Brand | Nissan |
|---|---|
| Item model number | 16546-JK20A |
| Manufacturer Part Number | 16546-JK20A |
This listing is a genuine Nissan factory air filter pair that replaces the original engine intake filters on compatible Infiniti models. They arrive pre-oiled and match the factory part number, pleat count, and stamped markings, so installation is a simple swap into the intake housings with no modifications. In everyday use they provide the same filtration approach the vehicle was designed for, trapping dust and debris with an oiled media rather than a dry aftermarket element. That helps preserve airflow while capturing contaminants, which is important for performance-minded owners who want consistent breathing and engine protection. The practical benefits are straightforward: exact fit, familiar maintenance routine, and the confidence of factory-spec parts. The main limitation is cost compared with generic aftermarket dry filters and the need to stick with scheduled changes rather than longer-life washable options favored by some tuners.
Best for: Performance-oriented buyers who prioritize factory-spec fit and consistent engine breathing to preserve driving response and reliability during spirited use.
Less Ideal for: Owners seeking a reusable washable filter or the lowest-cost replacement who prefer extended service intervals should consider aftermarket alternatives.
- Genuine Nissan factory replacement matching listed part number for direct fit.
- Pre-oiled media consistent with the original filtration method.
- Exact pleat count and molded markings aid verification of authenticity.
- Simple drop-in installation with no tooling or modification required.
- More expensive than many aftermarket dry filters.
- Not a reusable or washable element unlike some performance filters.
Verdict Choose this genuine Nissan filter pair if you want factory-spec, pre-oiled replacements that preserve the original airflow and filtration behavior for G37 performance maintenance.
4. KAX Premium Engine Air Filter (CA6900)
| Model | Premium Engine Air Filter |
|---|---|
| Automotive Fit Type | Vehicle Specific Fit |
| Shape | Rectangular |
| Item Weight | 7.4 ounces |
The KAX Premium Engine Air Filter CA6900 is a direct-fit replacement designed to meet factory-style airflow and filtration needs for compatible Infiniti models. It installs the same way as a factory filter and is used during routine maintenance to keep intake air free of dust and debris. The filter uses an embossed paper media engineered for crease stability and a high dust-holding capacity, which the manufacturer says provides up to 20,000 miles between changes. Practical benefits include consistent engine breathing, straightforward installation without modifications, and multiple customer reports of good fitment on applicable Infiniti vehicles. Limitations are that it is a disposable paper filter rather than a washable performance element, so it requires regular replacement instead of cleaning and reuse. Also the product listing covers many vehicle applications so buyers should confirm the CA6900 number matches their Infiniti model and year before ordering.
Best for: Budget-conscious owners who prioritize an inexpensive, factory-style replacement that fits and performs like the original for routine maintenance.
Less Ideal for: Drivers seeking a reusable or high-performance washable filter should consider aftermarket performance elements instead.
- Vehicle-specific fit for compatible Infiniti models for easy installation
- Embossed paper media with high dust-holding capacity for extended service life
- Consistent filtration to help protect engine components and maintain performance
- Disposable paper construction not washable or reusable
- Manufacturer claims mileage life may vary with driving conditions
Verdict A cost-effective, factory-style replacement filter for Infiniti owners who want straightforward fit and reliable filtration without the expense of washable performance filters.
5. EPAuto CP743 Cabin Air Filter (replacement for Infiniti G37)
| Brand | EPAuto |
|---|---|
| Item model number | FC-019-1 |
| Compatible models | Infiniti G37 (2008-2013) listed |
| Contains | Activated carbon for odor control |
This EPAuto CP743 cabin air filter replaces the factory unit behind the glove box and is intended to restore clean, odor-reduced airflow to the Infiniti G37’s HVAC system. Installation is straightforward for a DIYer: drop the glove box, remove the cover and slide the old filter out, then insert the new one. The panel-style filter includes activated carbon to help reduce smells and traps dust, pollen and road debris to improve in-cabin air quality. Multiple reviewers report it fits like the factory part and installs without modifications. Practical benefits include lower cost than a dealer replacement and yearly maintenance simplicity. Limitations are that aftermarket packaging may lack some OEM sealing foam and there is no independent lab filtration grade included on the listing, so absolute filtration performance versus a branded factory filter cannot be verified from the product information. Still, for routine replacement intervals this filter offers a close, low-risk alternative to a dealer unit.
Best for: Risk-averse mainstream buyers who prioritize a reliable, low-cost factory-replacement style cabin filter and prefer a straightforward DIY maintenance item to keep in-cabin air fresh.
Less Ideal for: Buyers who require verified high-efficiency or specialized medical-grade filtration, or those who demand factory-supplied seal components and documentation, should consider higher-spec or dealer options.
- Designed to match factory fit for Infiniti/Nissan cabin filter locations
- Built-in activated carbon helps reduce odors inside the cabin
- Easy DIY installation behind the glove box with no special tools
- Widely compatible with Infiniti G37 model years listed and direct replacement for common part numbers
- Listing does not provide a measured filtration efficiency rating or test data
- Some users note the filter lacks the OEM foam edge that can improve the seal
Verdict A budget-friendly, near-factory replacement for the Infiniti G37 that makes DIY cabin-filter maintenance easy while adding basic odor control, though it lacks published filtration test data.
6. FRAM Extra Guard CA6900 Engine Air Filter
| Brand | Fram |
|---|---|
| Model | FRAM CA6900 |
| Automotive Fit Type | Vehicle Specific Fit |
| Position | Front, Rear |
| Protection Interval | Up to 12,000 miles / 12 months |
The FRAM Extra Guard CA6900 is a drop-in engine air filter that replaces the factory unit and keeps intake air cleaner between service intervals. For the Infiniti G37 the filter installs the same way as the factory part and is used during routine maintenance to prevent dirt and debris from entering the engine. FRAM states the filter media captures more debris than standard retail brands and is rated for protection up to 12,000 miles or 12 months, which translates to fewer filter swaps for typical drivers. Real-world benefits include maintaining throttle response and avoiding the power loss and rough idle that come from a clogged filter. Fit and seal are reported by many users to match factory expectations, though some buyers have noted occasional fitment tightness on certain model years which may require a firm seat in the housing. If you want a straightforward, cost-conscious replacement that performs like a factory-style filter and stretches service intervals, this is a practical choice; if you need specialized high-flow or washable filters, look elsewhere.
Best for: Practical optimizers who prioritize reliable, affordable maintenance that keeps the Infiniti G37 running well without extra fuss or aftermarket modification.
Less Ideal for: Drivers seeking increased airflow for performance tuning or a reusable washable filter should consider high-flow performance brands instead.
- Factory-style drop-in replacement for easy DIY installation
- Filter media claims 2x less dirt passage than basic retail filters for improved protection
- Rated for up to 12,000 miles or 12 months between changes
- Widely available with many users reporting reliable fit and improved engine responsiveness
- Not a high-performance or reusable filter option
- Some reports of a tight fit in the housing on certain model years that can require extra effort to seat properly
Verdict A budget-friendly, factory-style replacement that maintains G37 performance with extended service intervals but is not a performance upgrade.
7. BOSCH 6017C HEPA Cabin Air Filter
| Brand | Bosch |
|---|---|
| Model | 6017C |
| Filtration efficiency | 99.97% at 0.3 microns |
| Media layers | Melt-blown electrostatic + static cotton layer |
The Bosch 6017C is a high-efficiency cabin air filter built to trap fine particulates and reduce odors in the passenger compartment of compatible Infiniti G37 models. It installs like a standard replacement cabin filter and is intended for routine service during cabin filter intervals. The filter uses a melt-blown electrostatic layer plus an extra static cotton layer to boost particle capture and a ribbed frame to keep the media stable so it does not collapse under airflow. Bosch says the media meets HEPA-class efficiency for 0.3 micron particles, which in practice means noticeably cleaner air and better removal of dust, pollen, and many odors compared with basic replacement filters. Some users report a small reduction in blower output at the highest fan settings because denser media restricts airflow slightly, so cooling performance in very hot conditions can feel a bit reduced. Fitment and frame rigidity vary by vehicle year and trim, so verify the G37 fit carefully before installation.
Best for: A balanced all-round buyer who wants noticeably cleaner cabin air and is willing to prioritize filtration efficiency over absolute maximum HVAC airflow when driving the Infiniti G37.
Less Ideal for: Drivers who need peak HVAC airflow for extreme hot-climate performance or who prefer filters specifically marketed for odor/carbon removal should consider other options.
- HEPA-class filtration rated to capture 99.97% of 0.3 micron particles for strong protection against dust and pollen
- Multi-layer media with electrostatic and cotton layers increases particle capacity and odor reduction without chemical additives
- Structural ribs help the filter retain shape and airflow characteristics over its service life
- Direct-replacement fit for compatible Infiniti G37 model years simplifies DIY installation
- Denser HEPA media can slightly reduce maximum blower airflow at the highest fan settings
- Some buyers report fit/frame issues on certain vehicle trims so double-check fitment before installing
Verdict If you want the best particulate filtration for an Infiniti G37, the Bosch 6017C delivers HEPA-level protection with a simple direct-replacement fit, at the cost of a small reduction in peak blower output.
Choosing the Right Infiniti G37 Air Filter: Key Factors to Consider
Filtration Efficiency
Filtration efficiency determines how well an air filter captures dirt, dust, and other particulates before they reach the engine. Higher-efficiency media trap smaller particles, which reduces wear on internal components and helps preserve compression and fuel system cleanliness.
Efficiency must be balanced against airflow. Extremely dense media may capture more particulates but can restrict airflow if not properly designed. Look for filters with published efficiency ratings or particulate retention data to gauge protection levels without guessing performance.
Fitment and Seal
A correct physical fit and a reliable seal prevent unfiltered air from bypassing the media and entering the engine. Proper dimensions and a robust sealing surface are essential, because even a small gap can allow contaminants through and negate the filter's effectiveness.
Consider how the filter mounts in the housing and whether the gasket material and compression are adequate for a tight seal. Durable construction that maintains shape under engine bay temperature changes helps ensure consistent sealing over time.
Filter Media Type
Filter media comes in different materials such as pleated paper, synthetic blends, or oiled cotton. Each type has tradeoffs in filtration, airflow, and maintenance. Pleated paper is common for single-use replacements and offers predictable performance, while synthetic media can provide improved dust-holding without significantly increasing restriction.
Understand whether the media is intended for single replacement or serviceable use. Media durability affects how the filter performs as it loads with debris and how often you will need to replace it.
Airflow Resistance
Airflow resistance, or pressure drop across the filter, affects how easily the engine breathes. Lower resistance supports stronger throttle response and can help maintain fuel economy, while excessive restriction can reduce power and efficiency. A well-designed filter balances particle capture with minimal pressure drop.
Manufacturers sometimes publish resistance or flow curves; if available, use those to compare how filters perform at typical engine intake flows. Consider expected driving conditions because heavy dust can increase resistance more quickly.
Durability and Environmental Resistance
Durability covers how well the filter holds up to heat, vibration, and exposure to oil or moisture in the engine bay. Robust frame materials and resilient media reduce the risk of deformation or media breakdown that would compromise performance. Environmental resistance matters in regions with high humidity or frequent short trips.
A filter that resists collapse and maintains its sealing surfaces will provide reliable protection for longer, reducing the chance of premature failure and the need for unscheduled replacement.
Maintenance and Replacement Interval
Understanding how often a filter should be serviced or replaced affects long-term ownership and performance. Filters designed for longer dust-holding capacity will extend replacement intervals, while others require more frequent changes to avoid restriction and maintain protection.
Factor in your typical driving conditions. Dusty or high-pollution environments will shorten service life. Clear maintenance guidance from the manufacturer helps plan replacements and avoid performance degradation.
FAQ
How often should I replace the Infiniti G37 air filter?
Replacement frequency depends on driving conditions and the filter type. Under normal driving, many engine air filters are replaced every 12,000 to 20,000 miles, but dusty environments often require more frequent changes. Inspect the filter visually during routine service and follow the vehicle's maintenance recommendations.
Can I use a reusable or washable air filter in the Infiniti G37?
Reusable filters are offered with different media and cleaning procedures. They can be cost-effective over time if maintained properly, but they require correct cleaning and re-oiling when applicable. Ensure any reusable option provides proper fit and does not introduce oil that could affect sensors or intake components.
Does a higher-flow air filter improve fuel economy in the G37?
A filter with lower airflow resistance can help the engine breathe more freely, which may marginally influence efficiency. However, real-world gains are usually modest and depend on the entire intake system and driving habits. Prioritize filtration quality to avoid increased engine wear that could negate small efficiency benefits.
What is the difference between an engine air filter and a cabin air filter?
An engine air filter protects the engine from particulates entering the intake, while a cabin air filter cleans the air that circulates inside the passenger compartment. They serve separate functions and are located in different parts of the vehicle, so replacing one does not substitute for the other.
How do I know the correct air filter size for my Infiniti G37?
The correct size is determined by the vehicle's airbox dimensions and mounting features. Use the vehicle's specifications or parts guide to confirm the exact dimensions and shape. Filters that match the OEM dimensions ensure a proper seal and secure installation.
Should I choose OEM vs aftermarket air filter for the G37?
OEM filters are designed to match factory specifications, which simplifies fitment and expected performance. Quality aftermarket options can also meet or exceed those specs, but you should verify dimensions, filtration ratings, and build quality. Choose based on documented fitment and material specifications rather than marketing claims.
How We Chose the Best Infiniti G37 Air Filter
We focused on filters that provide proper fitment and protection for the Infiniti G37's engine while maintaining airflow characteristics that support everyday drivability. Key evaluation criteria included filtration efficiency to trap particulates, dimensional accuracy for secure installation, and the filter media type for durability and dust-holding capacity. We also considered airflow resistance to avoid negatively affecting engine breathing and examined build quality and sealing features to prevent bypass.We excluded any items that did not match the G37's specified dimensions or lacked clear fitment data. Performance claims without supporting specifications were deprioritized. The shortlist reflects products that balance effective contaminant capture, consistent airflow, and reliable mechanical fit for the Infiniti G37 application.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing an air filter for an Infiniti G37, prioritize proper fit and filtration efficiency to protect the engine while maintaining airflow. Balance media type and airflow resistance based on your driving conditions so you do not sacrifice protection for marginal performance gains.Consider maintenance demands and environmental exposure when planning replacement intervals. A filter that seals well and holds dust without excessive restriction will offer the best long-term value for the G37.
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