JL Wrangler Air Filter Replacement and Cold Air Intake Options

The JL OEM air filter swaps in under 10 minutes with no tools. Replace every 15,000–30,000 miles for street use; inspect every oil change if you wheel in dust. Cold air intakes add a real intake note but measurable power gains are minimal on a naturally aspirated 3.6L.

# JL Wrangler Air Filter Replacement and Cold Air Intake Options

The 3.6L Pentastar breathes through a paper element housed in the factory airbox. Replacing it is the fastest maintenance task on the JL — no tools required, no coolant spills, nothing to torque. The question worth spending time on is whether to upgrade to an aftermarket intake, and the honest answer is: it depends on what you actually want.

For OEM filter swap:

• Replacement filter (Mopar 68402775AA, Fram CA12166, or K&N 33-5050)
• No tools required

For cold air intake installation:

• The intake kit (Volant, S&B, K&N Typhoon, Banks Ram-Air)
• 8mm and 10mm socket
• Screwdriver
• 30–90 minutes depending on kit complexity

1. Open the hood. The airbox is on the driver's side, forward of the firewall.
2. The airbox lid is held by two latches — squeeze and flip them up.
3. Lift the lid. The filter sits inside the box, rectangular, with the open side facing the lid.
4. Pull the old filter out. Note the orientation of the folded end — the new filter goes in the same way.
5. Drop the new filter in. Close the lid, re-engage the latches. Done.

Interval: Every 15,000 miles under normal conditions. Dusty trail use means inspecting every oil change — a visibly brown, clogged filter costs you throttle response and fuel economy. Paper filters cannot be cleaned; replace them.

Does it make power on a naturally aspirated 3.6L?

Honestly: not much. Dyno results on the factory JL intake show it flows adequately for street and moderate trail use. Most aftermarket intakes gain 3–7 rear-wheel horsepower — real but not transformational. The larger benefit is sound: aftermarket intakes produce a deeper induction roar under hard acceleration that a lot of JL owners want.

What the intakes actually offer:

• Better filtration capacity (K&N oiled filters flow more and can be cleaned)
• More induction sound
• Better access to the filter for inspection
• Some kits place the filter higher (away from water ingestion risk in crossings)

Popular options:

Water crossings: All of these intakes position the filter near or in the same location as the factory airbox. If you run deep water crossings, a snorkel is the right fix — not an air intake. Sucking water through any intake at speed hydrolocks the engine. This is not recoverable.

• Oiled vs. dry filters: K&N oiled filters require re-oiling after cleaning with their kit. Over-oiling an oiled filter can foul the MAF sensor. Follow the directions — use a light coat of oil, let it wick for 20 minutes before installing.
• Intake tube connections: If you install an aftermarket intake, verify all connections are tight before driving. An air leak between the airbox and throttle body causes rough idle, lean running, and check engine codes (P0171, P0174).
• Factory airbox re-use: If you decide aftermarket intakes aren't worth it, the factory airbox is a legitimately good design. Clean it out with a rag, replace the filter, and move on.

• OEM replacement filter (Fram or Mopar): $18–$28

For most JL owners on a budget, the drop-in K&N filter is the best upgrade — same money as two OEM filters, and it's cleanable and reusable for the life of the Jeep.

Tools required

• flathead screwdriver or no tools for OEM filter

Related

• All Jeep Wrangler JL guides & tools
• Browse the full DIY database

---

Written and maintained by an AZ wheeler and driveway wrencher. Always cross-reference your factory service manual — modifications affect vehicle safety and warranty. Work at your own risk.

Trail Manual · About · Privacy · Terms · Database