2020 Jeep Grand Cherokee Air Filter: Essential Maintenance & Replacement Guide

Replacing the air filter in your 2020 Jeep Grand Cherokee is a simple, critical, and cost-effective maintenance task every owner should perform regularly. Both the engine air filter and cabin air filter directly impact vehicle performance, efficiency, and interior air quality. Failure to replace these filters at recommended intervals can lead to reduced fuel economy, diminished engine power, potential engine issues, poor cabin air quality, and increased strain on the HVAC system. This comprehensive guide details everything you need to know about identifying, selecting, and replacing both air filters in your 2020 Grand Cherokee, empowering you to maintain your vehicle optimally.

Why Replacing Your Jeep's Air Filters Matters

The air filters in your Grand Cherokee serve distinct but vital purposes:

  1. Engine Air Filter: This filter cleans the air entering your 3.6L V6, 5.7L V8, or EcoDiesel engine. Clean air is essential for efficient combustion. A clogged filter restricts airflow, forcing the engine to work harder. Consequences include:

    • Reduced Fuel Economy: Restricted airflow creates an inefficient air-fuel mixture. You'll visit the gas pump more frequently.
    • Loss of Power and Performance: The engine lacks the air needed for optimal combustion, resulting in sluggish acceleration.
    • Potential Engine Damage: Extreme restriction can lead to engine misfires or strain sensors. Over time, unfiltered dirt particles entering a damaged filter can cause internal engine wear.
    • Increased Emissions: Poor combustion creates higher levels of pollutants exiting the exhaust.

  2. Cabin Air Filter: This filter purifies the air entering your vehicle's interior through the heating, ventilation, and air conditioning (HVAC) system. It traps pollen, dust, pollutants, and other airborne particles. A neglected cabin filter leads to:

    • Poor Interior Air Quality: Reduced filtering capacity allows allergens, dust, and pollutants into the cabin.
    • Reduced HVAC Efficiency: A blocked filter restricts airflow through the vents, making heating and cooling less effective.
    • Unpleasant Odors: Accumulated debris and moisture can cause musty smells from the vents.
    • Foggy Windows: Reduced airflow impairs the defroster's ability to clear windshield moisture.
    • Potential HVAC Blower Motor Strain: Similar to the engine, a restricted filter forces the blower motor to work harder, potentially shortening its lifespan.

Manufacturer Recommendations & Replacement Frequency

Jeep's official maintenance schedule provides clear guidelines for air filter replacement. Following these is the best starting point:

  • Engine Air Filter: Jeep typically recommends inspecting the engine air filter every 12,000 to 15,000 miles and replacing it as needed. However, based on driving conditions, replacement every 15,000 to 30,000 miles is common practice.
  • Cabin Air Filter: Jeep usually recommends replacing the cabin air filter every 20,000 miles. Some model year/service manual variations might cite slightly different intervals, but 20k miles is a standard benchmark.

Your Driving Environment Dictates Frequency:

These are guidelines. Your actual replacement needs depend heavily on your driving environment:

  • Severe Duty Conditions: If you frequently drive in any of the following, replace BOTH filters more often (potentially every 10,000-15,000 miles for the engine filter, and every 12-15,000 miles for the cabin filter):
    • Dusty, unpaved roads or construction zones.
    • Areas with heavy traffic congestion (stop-and-go driving).
    • Regions with high levels of airborne pollution or pollen (high allergy areas).
    • Off-road driving.
    • Areas frequently impacted by dust storms or wildfire smoke.
  • Visual Inspection is Crucial: Regardless of mileage, physically inspect your engine air filter periodically (easy to do) and replace it if it looks dark, covered in debris, or physically damaged. If you notice reduced airflow, odors, or musty smells from your vents, check your cabin filter.

Step-by-Step Guide: Replacing the 2020 Jeep Grand Cherokee Engine Air Filter

Replacing the engine air filter is a straightforward DIY task requiring minimal tools (usually none beyond your hands).

  1. Locate the Air Filter Housing: Pop the hood. The engine air filter box is typically located on the passenger side near the front of the engine bay. It's a rectangular or trapezoidal black plastic box with large intake ducts leading to the engine.
  2. Open the Housing:
    • Identify the fasteners securing the top cover. On the 2020 Grand Cherokee, this usually involves releasing 2-4 metal clamps or pushing plastic tabs upward. Some models use a combination of clamps and small bolts or screws (refer to your owner's manual if unsure, but clamps are most common).
    • Release all clamps/tabs. You might need a flat-head screwdriver to gently pry metal clamp tabs open.
    • Carefully lift the top cover of the housing upward. You may need to disconnect a small sensor cable clip; if present, gently unclip it. Avoid bending or pulling wires excessively.
  3. Remove the Old Filter: Lift out the old filter. Note its orientation – it will only fit one way. Inspect the inside of the air filter housing box. Look for any significant debris accumulation or signs of moisture/oil contamination. Use a vacuum hose or a microfiber rag lightly dampened with water to gently clean out any loose dirt if needed. Avoid introducing liquids near electronic sensors or ports within the housing. Do not use compressed air inside the engine compartment near sensors.
  4. Install the New Filter:
    • Ensure the new filter has the identical size and shape as the old one.
    • Place it into the lower housing section carefully, matching the orientation noted in step 3. The filter will fit snugly but should not need excessive force. Ensure it sits flat and sealed against the housing lip all the way around.
  5. Reassemble the Housing:
    • Carefully lower the top cover back onto the lower housing, ensuring it seats properly over the filter edges.
    • Reconnect any sensor clip disconnected earlier.
    • Secure all clamps or tabs you released in step 2. Ensure they are tight enough to fully close the housing and create a proper seal. Metal clamps should be firmly pushed closed. Plastic tabs should click securely into place. If screws/bolts were present, tighten them gently but firmly – avoid overtightening plastic components.
  6. Verify: Visually check that the housing is fully closed and sealed all around. Start the engine and listen for any unusual air leaks or whistling sounds, indicating an improper seal.

Step-by-Step Guide: Replacing the 2020 Jeep Grand Cherokee Cabin Air Filter

The cabin air filter location varies slightly between years. For the 2020 Grand Cherokee, it's located behind the glove box.

  1. Empty and Lower the Glove Box:
    • Open the glove box.
    • Look at the interior sides. Find the stopper arms on both the left and right sides – these are usually small plastic "tabs" or "arms" that limit how far the glove box can drop down.
    • Gently pinch or push the ends of these stopper arms inward simultaneously while lowering the glove box door. This allows the glove box door to swing down much further than normal.
  2. Locate the Filter Access Cover: Behind the glove box door (now lowered), you'll see a long, rectangular plastic access door. This cover is typically on the upper portion of the HVAC housing facing toward the passenger seat area. It often has slots or finger grips on its outer edges.
  3. Remove the Access Cover: Push the securing tabs located on the sides or top/bottom of the cover toward the center of the cover. While holding the tabs, gently pull the cover straight out toward you.
  4. Remove the Old Filter: The cabin filter slides vertically into its slot. Pull the old filter straight down and out.
  5. Install the New Filter: Check the airflow arrows printed on the side of the new filter. Crucial: The arrows should point DOWNWARD when installing (indicating airflow direction - into the HVAC system). Slide the new filter up into the slot, ensuring it is fully seated and flush within the housing. It should slide in easily and not be forced.
  6. Replace the Access Cover: Align the plastic cover and push it firmly back into place until all securing tabs snap securely. You should hear a distinct click.
  7. Raise the Glove Box: Lift the glove box door back into its normal position. Make sure to guide both stopper arms back into their slots on either side as you lift. You should feel a slight pop as the glove box latch re-engages. Close the glove box door securely.

Choosing the Right Replacement Air Filters

Selecting quality filters ensures performance and longevity:

  1. Engine Air Filter Types:
    • Standard Paper Filters: Oiled paper media captures particles effectively. Standard choice from Jeep (Mopar) and many aftermarket brands. Performs well under normal conditions.
    • High-Flow Air Filters: Often use specialized cotton gauze material. Claim slightly improved airflow, potentially leading to minor increases in horsepower or MPG under high-load conditions (typically negligible for daily driving). Crucial: These are washable and require periodic cleaning and re-oiling per manufacturer instructions (usually annually or every 50k miles). Using too much oil can damage engine sensors. Brands: K&N, AFE, aFe POWER. Research filter oiling procedures carefully.
    • Premium Pleated Paper/Composite Filters: Use more filter media or advanced materials for better particle capture and improved airflow compared to basic filters. Offer a balance of performance and filtration. Brands: WIX, Bosch, PurolatorONE.
  2. Cabin Air Filter Types:
    • Standard Particulate Filters: Trap dust, pollen, and other larger particles. Common and cost-effective.
    • Activated Carbon Filters: Incorporate a layer of activated charcoal in addition to particulate filtration. This charcoal effectively adsorbs odors, pollutants, and gases (like vehicle exhaust fumes). Highly recommended for urban driving or areas with poor air quality/strong odors.
    • Multi-Layer/HEPA-Type Filters: Offer enhanced particle filtration efficiency, capturing very fine particles including some bacteria and allergens. Excellent for allergy sufferers. Brands: FRAM Fresh Breeze®, PurolatorBOSS Cabin Air Filter, OEM Mopar Carbon.
  3. Key Considerations When Purchasing:
    • Vehicle Fit: Ensure the filter explicitly states compatibility with the "2020 Jeep Grand Cherokee" and matches your engine size if necessary. Double-check model numbers.
    • Quality vs. Price: Cheap, no-name filters often have inferior pleating, seals, and media. Stick with reputable brands (Mopar, WIX, Purolator, Bosch, FRAM, ACDelco, Mann-Filter, K&N) for guaranteed fit and performance.
    • Filtration Efficiency: Look for filters meeting relevant industry standards (e.g., ISO 5011 for engine filters). Higher efficiency traps more particles.
    • Specific Needs: Choose activated carbon if odor reduction is important, or HEPA-style for maximum particle/allergen removal in the cabin. Decide if a washable engine filter fits your maintenance willingness.
  4. Where to Buy:
    • Dealer (Mopar): Guaranteed OEM fit and quality. Often the most expensive option.
    • Major Auto Parts Stores (AutoZone, Advance Auto Parts, O'Reilly Auto Parts, NAPA): Wide selection of brands. Staff can usually confirm fitment. Frequent sales.
    • Online Retailers (Amazon, RockAuto, Summit Racing, Tire Rack): Often the best prices and broadest selection. Read customer reviews carefully. Ensure seller is reputable. RockAuto is particularly cost-effective.
    • Big Box Stores (Walmart): Often have budget-friendly options from major brands like FRAM.

Common Questions Answered (Q&A)

  • Q: What happens if I drive with a dirty air filter?
    • Engine Filter: Reduced power, worse gas mileage, potentially higher emissions, eventual risk of engine strain or premature wear.
    • Cabin Filter: Poor air quality inside, reduced HVAC airflow, lingering odors, slower defrosting, potential strain on the blower motor.
  • Q: Can a dirty air filter cause engine problems?
    • Yes, severely. Extreme restriction can cause drivability issues like hesitation or misfires. If the filter element becomes damaged, large amounts of dirt entering the engine cause accelerated wear on cylinders, piston rings, valves, and turbochargers if equipped.
  • Q: Do different engines have different engine air filters?
    • Yes. The 3.6L V6, 5.7L V8, and 3.0L EcoDiesel engines in the 2020 Grand Cherokee require different air filters. Verify the specific filter compatible with your Grand Cherokee's engine before purchasing. Cabin filters are usually the same regardless of engine.
  • Q: How can I tell if my air filter is clogged without removing it?
    • Engine Filter: Significant loss of power during acceleration, a noticeable drop in fuel economy over several tanks, a whistling sound from the intake under heavy throttle, or the "Service Air Filter" message appearing (if equipped, typically requires a dealer scan tool reset).
    • Cabin Filter: Weak airflow from vents, unpleasant smells (musty or dirty sock odor) when turning on AC or heat, increased allergy symptoms inside the car, windows fogging easily or not clearing quickly.
  • Q: What is the Mopar part number for the 2020 Grand Cherokee engine air filter?
    • Common Mopar OEM part numbers include 68318049AA (fits 3.6L), 68318068AA (fits 5.7L Hemi), and 68329378AC (fits 3.0L EcoDiesel). Always double-check fitment using your VIN when ordering.
  • Q: What is the Mopar part number for the 2020 Grand Cherokee cabin air filter?
    • Common Mopar OEM part numbers include 68270050AA (Standard - Cotton/Polyester), 68270049AA (Activated Carbon). Always double-check fitment using your VIN when ordering.
  • Q: Are washable/reusable K&N engine filters worth it?
    • This is subjective. They cost more upfront but last the life of the vehicle if maintained. Pros: Potential small performance gain (often debated), long-term cost savings. Cons: Higher initial cost, extra labor for cleaning/re-oiling (strictly required), risk of over-oiling and damaging sensors (MAF sensor contamination is a well-known risk with improperly oiled filters). For most owners concerned with simplicity and guaranteed filtration, high-quality disposable filters (like WIX, PurolatorONE) are recommended.

Troubleshooting Potential Post-Installation Issues

  • Rattling Noise: Loose clips on the engine air filter housing or a cabin filter not fully seated in its slot are common causes. Verify clips are fully secure and the cabin filter is pushed completely into the housing.
  • Significant Whistling Sound: Strong whistling under acceleration indicates an air leak in the engine air intake system. Double-check that the engine air filter housing is sealed correctly. Verify all clamps are tight, the cover is seated flush, the filter itself has no damage to its seals, and no intake duct connections became dislodged.
  • Engine Runs Rough (Misfire/Surging) After Replacement: Primarily a risk after installing an oiled performance filter: Excessive oil from a K&N-style filter can contaminate the Mass Air Flow (MAF) sensor. Clean the MAF sensor using MAF-specific cleaner only (do NOT touch the delicate sensor wires). Ensure you followed the filter's oiling instructions precisely and did not over-oil.
  • Poor HVAC Airflow After Cabin Filter Change: Confirm the cabin filter was installed with the airflow arrows pointing DOWN. Installing it upside down blocks airflow. Verify the new filter is the correct size and make for the 2020 Grand Cherokee. Ensure the access cover is securely snapped back in place without gaps.
  • Check Engine Light (CEL) Illuminates After Replacement: While less common, a severely restricted old filter might have masked an underlying intake/airflow issue. More likely, if you installed an oiled filter, oil contamination on the MAF sensor is the prime suspect. Scan the vehicle for trouble codes to pinpoint the issue (e.g., P0101 - MAF sensor performance). Cleaning the MAF sensor might resolve it.

Conclusion: Simple Maintenance, Significant Benefits

Replacing the engine and cabin air filters in your 2020 Jeep Grand Cherokee is among the simplest yet most impactful preventive maintenance tasks you can perform. Investing minimal time and cost (typically under $100 for both filters) at recommended intervals delivers tangible benefits: preserving your engine's power and efficiency, protecting vital engine components, saving money on fuel, and ensuring the air you breathe inside your Grand Cherokee is clean and fresh. Regularly inspecting the engine air filter and being mindful of signs that the cabin filter needs changing puts control of your vehicle's health and your comfort firmly in your hands. Follow the straightforward steps outlined here, choose quality filters from reputable brands, and enjoy the continued performance and comfort your Jeep Grand Cherokee is designed to provide.

Back to blog