2014-2017 Infiniti Q50 Hood: Solving Flutter, Dents, and Latch Problems

Vehicle-Specific Known Issues

The hood on the 2014-2017 Infiniti Q50 is known for a few specific issues, primarily related to its lightweight aluminum construction and latching mechanisms.

Hood Flutter or Vibration at Highway Speeds (TSB)

The most widely reported issue is a noticeable hood flutter or vibration at highway speeds, typically above 60-70 MPH or when driving into a strong headwind. This can be alarming, making it seem as if the hood is not latched securely. While checking the latch and adjustable rubber bump stops is a good first step, the root cause is often a manufacturing defect addressed in a Technical Service Bulletin (TSB).

The TSB explains that the problem is caused by an insufficient bond between the inner support frame and the outer skin of the hood. Over time, or from the factory, gaps in the adhesive allow the thin outer aluminum panel to lift and vibrate in the wind. The official fix is not to adjust the latch, but to inject a non-expanding panel vibration control material (like SEM 39977 or 3M 04274) into the voids between the panels to re-bond them.

Latch and Release Mechanism Failure

Owners have reported problems with the hood latching system. This can manifest in a few ways:

• Hood won't close/latch: One or both of the latches may fail to engage when the hood is closed. This is often caused by dirt and debris accumulating in the latch mechanism, or a worn-out internal spring.
• Hood won't open: The release handle inside the car may feel slack, or pulling it does not pop the hood. This is usually due to a stretched or broken release cable. In some cases, the cable may have just become disconnected from the latch assembly.

Prone to Dents

A downside of the lightweight aluminum construction is that the hood is more susceptible to dents and dings than a traditional steel hood. Owners have reported noticeable dents from minor impacts like small rocks on the highway. This is a critical factor to consider when inspecting a used hood.

Buying a Used 2014-2017 Q50 Hood

A used OEM hood is often the best choice for replacement, as it guarantees perfect fitment and the correct aluminum material. Aftermarket hoods are often made of heavier steel, which can affect the vehicle's weight distribution and may not perform as intended in a collision. Carbon fiber hoods are a popular but expensive aftermarket option.

What to Check Before You Buy

When inspecting a used OEM hood, perform these checks:

1. Check for Major Damage: Look for large dents, creases, or bends, especially along the body lines. A damaged hood listed as 'Grade C' with a bent corner and peeling paint can still cost around $500, so a good one is a significant investment.
2. Inspect for Previous Repairs: Look for signs of body filler (Bondo). Run a magnet along the surface; it will not stick to the aluminum OEM hood but may reveal steel patches or a cheaper steel aftermarket hood. Check the underside for non-factory welds or mismatched paint.
3. Examine the Seams: Pay close attention to the edges and underside where the inner frame meets the outer skin. Look for any signs of separation or gaps, which could lead to the hood flutter issue described in the TSB.
4. Check the Paint Condition: Getting a hood in the correct factory color can save you hundreds of dollars on painting. Inspect for deep scratches, clear coat peeling, or fading.
5. Verify Compatibility: The same hood, part number F510M-4GAMA, fits all 2014-2018 Infiniti Q50 models, including hybrid and all engine options (2.0T, 3.0T, 3.7L).

Cost of Replacement

The cost to replace a 2014-2017 Infiniti Q50 hood varies significantly based on the part source and whether it needs to be painted.

Installation Guide

Replacing the hood is a straightforward process but should be done with a helper to avoid scratching the paint or damaging the windshield.

• Difficulty: 2 out of 5
• Estimated Time: 1.5 hours
• Tools Needed: Socket wrench with 12mm socket, flat-head screwdriver, panel clip pliers, and a helper.

Step-by-Step Replacement

1. Prop the Hood Open: Use the factory prop rod or have your helper support the hood.
2. Disconnect Components: Using a flat-head screwdriver, carefully pry the clips to release the hood struts from the hood. Disconnect the windshield washer fluid hose.
3. Mark Hinge Alignment: Use a marker to trace the position of the hinge bolts on the hood. This will make aligning the new hood much easier.
4. Remove the Hood: With your helper supporting the full weight of the hood, remove the two 12mm bolts from each hinge. Lift the old hood away.
5. Transfer Parts: Move the under-hood insulation pad, weather stripping, washer nozzles, and latch strikers from the old hood to the new one.
6. Install the New Hood: With your helper, position the new hood onto the hinges. Loosely install the bolts.
7. Align and Tighten: Close the hood carefully and check the panel gaps with the fenders and front bumper. Adjust the hood's position on the hinges until the gaps are even, using your alignment marks as a guide. Once aligned, fully tighten the hinge bolts.
8. Reconnect Components: Re-attach the hood struts and the washer fluid hose. Close the hood and verify the latch engages securely. Adjust the rubber bump stops as needed to ensure the hood is level with the fenders when closed.

Frequently Asked Questions (FAQ)