2020–2024 Cadillac CT4-V
By Tom Becker ✓ Certified Mechanic · Published Sep 21, 2026 · Updated Oct 22, 2026
Save $75 by doing it yourself! Shop cost: $110
Quick answer: Engine Air Filter Replacement on a 2020–2024 Cadillac CT4-V is rated Easy and takes about 15 minutes. You'll need 1 tool for this job, and parts cost about $35. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name | Part Number | Price | Buy |
|---|---|---|---|
| Engine air filter for 2020-2024 Cadillac CT4-V; verify engine, housing shape, and VIN fitment | — | $35.00 |
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Follow these steps carefully
Park level, engine off, and pop the hood. On the CT4-V's 2.7L turbo four, the air cleaner lives on the passenger side. Don't hunt in the center — that's the Blackwing's 3.6L V6 airbox; yours is on the passenger side.
Five screws hold the air cleaner cover down. Back them all out and set them where they can't roll away — fishing a dropped screw out of the bay is the longest part of this job. Keep the screws together.
Those five screws will absolutely try to roll into the engine bay. Set them in a cup or a magnetic tray the second they come out — I've spent twenty minutes fishing one screw out of a frame rail.
Lift the cover straight off the housing and set it somewhere clean. Take note of how it seats so it goes back on exactly the same way. Don’t set it face-down in the dirt.
Lift the old panel filter out, noting its orientation. Wipe or vacuum the dust from inside the housing. Don't clean the old filter with water or compressed air and reuse it — the owner's manual says this ruins it.
Drop the new filter in exactly the way the old one sat. It must match the original's fit, form, and function or it won't seal — even slightly off lets unfiltered air past, hard on a turbo engine.
Set the cover back on squarely and run all five screws back in. Snug them evenly, but don't gorilla them — the housing is plastic and the threads strip easily. Double-check the cover sits flush all the way around.
With the car in Park, reset the engine air filter life system via the DIC thumbwheel — otherwise it keeps nagging. Then start the engine and listen for whistling that means a bad seal. Repeat yearly or every 20,000 miles.
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
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