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Infiniti Q45 Engine Camshaft Position Sensor Covers

Infiniti Q45 Engine camshaft position sensor covers

Starting at low prices, AutoBuffy stocks multiple engine camshaft position sensor covers from top OE-quality brands. This cover seals the camshaft position sensor port on the engine, keeping oil in and contaminants out. When it cracks, warps, or leaks, oil can foul the sensor itself, triggering misfires, rough idle, and check engine codes that won't clear until the root cause is fixed.

Signs your Infiniti Q45 needs a new camshaft position sensor cover

  • Oil seeping from the camshaft position sensor mounting area on the engine block or head
  • Check engine light with stored codes related to camshaft position sensor performance or circuit faults
  • Rough or erratic idle that worsens after the engine reaches operating temperature
  • Engine misfires on startup that improve once oil pressure stabilizes
  • Visible oil film or wet residue on or around the sensor connector and wiring harness
  • Failed emissions test tied to camshaft timing or sensor rationality codes

Which camshaft position sensor cover should you buy for your Infiniti Q45?

The main decision is material quality and whether the cover includes a replacement O-ring or gasket. A cover that arrives as a complete kit — with the sealing hardware — saves a return trip and ensures a leak-free fit the first time.

OEM-equivalent (with O-ring kit)
Best for
Most drivers; straightforward like-for-like replacement
What you get
Matched fitment, correct material thickness, and a fresh seal in one package
OEM-equivalent (cover only)
Best for
Owners who have the O-ring or gasket already on hand
What you get
The cover alone at a slightly lower price; you source the seal separately
Heavy-duty / upgraded alloy cover
Best for
High-mileage engines or vehicles in extreme heat environments
What you get
Improved heat resistance and durability over the stock plastic or thin-metal design
Complete sensor-and-cover combo kit
Best for
When the sensor itself is oil-fouled or suspect
What you get
New cover plus a replacement camshaft position sensor, eliminating both failure points at once

Replacing a camshaft position sensor cover on a Infiniti Q45

Easy⏱ 30–60 minutesSocket set and ratchetFlathead and Phillips screwdriversNeedle-nose pliers (for retaining clips)Clean lint-free ragsBrake cleaner or electrical contact cleaner

Disconnect the battery negative terminal and unplug the camshaft position sensor connector before removing any fasteners. Pull the old cover, clean the mounting bore of any oil residue and old seal material, then seat the new O-ring or gasket and press the cover firmly into place before tightening fasteners to snug — overtightening a plastic cover can crack it. Reconnect the sensor and battery, start the engine, and inspect for leaks before clearing any stored codes.

Frequently asked questions

How much does it cost to replace camshaft position sensor covers on a Infiniti Q45?
Parts start at low prices on AutoBuffy. The cover itself is inexpensive, but total cost depends on whether you also replace the sensor or gasket. DIY installation keeps costs low; a shop may charge one to two hours of labor on top of the part price.
Can I drive my Infiniti Q45 with a leaking camshaft position sensor cover?
You can drive short distances, but it is not advisable. Oil migrating into the sensor connector degrades the sensor signal over time, leading to worsening misfires, rough running, and potential sensor failure. Continuing to drive also risks oil loss and can turn a cheap fix into a more expensive repair.
Is replacing a camshaft position sensor cover the same as replacing the sensor itself?
No. The cover is a separate housing or plug that seals the sensor's mounting bore in the engine. The sensor is the electronic component inside it. A damaged cover causes oil leaks and can contaminate a good sensor; inspect both whenever you pull the cover so you don't have to revisit the job.
Do I need to replace the O-ring or gasket when I replace the cover on my Infiniti Q45?
Yes, always replace the sealing O-ring or gasket at the same time. Reusing an old, compressed seal is the most common reason a freshly installed cover leaks immediately. Many covers sold for the Infiniti Q45 include the O-ring; confirm the listing before ordering so you have everything needed.
How do I know if the cover or the sensor itself is the source of the oil leak on my Infiniti Q45?
Clean the entire camshaft sensor area thoroughly, then run the engine for ten to fifteen minutes. A fresh oil trace appearing around the cover seam or O-ring groove points to the cover. Oil inside the sensor connector or on the sensor body usually means the seal has been leaking long enough to soak the sensor.
Will any camshaft position sensor cover fit my Infiniti Q45, or does it need to be vehicle-specific?
It must be vehicle-specific. Cover bore diameter, mounting tab configuration, and material vary by engine family. Use the year, make, model, and engine size to filter results. AutoBuffy's fitment search narrows the multiple available covers to only those confirmed for your Infiniti Q45, preventing a costly return.

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