Rolls-Royce Hood Strut Guide (2003-2023): Phantom vs. Ghost, Wraith & Dawn
These ultra-luxury cars use two different, non-interchangeable hood struts—learn how to identify the right one for your Phantom, Ghost, Wraith, or Dawn.
- There are two different, non-interchangeable hood struts: Part #51237040711 for the Phantom and #51237198451 for the Ghost, Wraith, and Dawn.
- Failure is a major safety hazard as the heavy hood can slam shut without warning. Securely prop the hood before any inspection or replacement.
- Always replace hood struts in pairs to ensure even lifting force and prevent damage to the hood.
- A used OEM strut is a good option, but inspect it for leaks, rust, or damage to the shaft before purchasing.
Critical Compatibility Warning: Two Different Struts
Warning: The Rolls-Royce Phantom uses a different, non-interchangeable hood strut from the Ghost, Wraith, and Dawn models. Though some model years overlap, the parts are specific to the vehicle's platform. Always verify the part number on your existing strut before ordering a replacement.
There are two primary OEM part numbers for the hood struts across these models. Mixing them up will result in a part that does not fit or function correctly.
- Part Number 51237040711: Fits the 2003-2016 Rolls-Royce Phantom (Chassis: RR1).
- Part Number 51237198451: Fits the 2010-2019 Rolls-Royce Ghost (Chassis: RR4), 2013-2023 Rolls-Royce Wraith (Chassis: RR5), and 2015-2023 Rolls-Royce Dawn (Chassis: RR6).
For example, a 2012 Rolls-Royce could be a Phantom or a Ghost. These two models require different hood struts. Visually comparing the part or matching the OEM number is the only way to guarantee correct fitment.
Symptoms of a Failing Hood Strut
When hood struts begin to fail, the signs are usually obvious and progressively worsen. The most significant concern is the safety risk of a heavy hood falling without warning.
- Hood Won't Stay Open: This is the most common symptom. The hood may slowly sag after being opened or slam shut with little to no warning.
- Hood is Hard to Lift: A functional strut assists in lifting the hood. If it feels excessively heavy to open, the struts have lost their pressure.
- Visible Fluid Leaks: Oily residue or wetness on the strut's body indicates that the internal seals have failed and hydraulic fluid is escaping.
- Creaking or Hissing Noises: Audible sounds when opening or closing the hood can signal worn internal components or gas escaping from the cylinder.
- Uneven Hood Height: If one strut fails before the other, the hood may appear tilted or crooked when open.
Buying a Used Hood Strut: What to Check
A used OEM hood strut can be a reliable and cost-effective alternative to expensive new dealer parts or low-quality aftermarket options. Here’s what to look for when buying a recycled part:
- Verify the Part Number: This is the most important step. Ensure the number stamped on the strut (e.g., 51237040711 or 51237198451) matches the part required for your specific model.
- Inspect the Shaft: The polished metal rod (the piston) should be perfectly smooth and free of scratches, rust, or pitting. Any damage to this surface will quickly destroy the internal seal and cause the strut to fail.
- Check for Leaks: Examine the area where the shaft enters the main cylinder body. There should be no signs of oil or greasy residue, which points to a failed seal.
- Examine the Body: The black cylinder body should be free of dents or significant damage. A dent can impede the piston's movement internally, causing the strut to bind or fail.
- Check the End Fittings: Ensure the mounting points at both ends are intact, not cracked, and free of excessive rust or damage.
Pro Tip: Always replace hood struts in pairs. Replacing only one puts uneven stress on the hood and its hinges and will cause the older strut to fail shortly after. A matched pair ensures a smooth, even lift and a longer service life.
Known Issues, Recalls, and TSBs
There are no active recalls or Technical Service Bulletins (TSBs) from Rolls-Royce or the NHTSA specifically related to hood strut failure on the Phantom, Ghost, Wraith, or Dawn. However, failure is a common maintenance issue as the vehicles age. The high heat generated by the V12 engine, which is well-insulated under the hood, can accelerate the degradation of the strut's internal seals.
Cost of Replacement
Replacing hood struts is a relatively inexpensive repair, especially when done as a DIY project. The primary cost difference is between the parts themselves.
| Part Source | Estimated Price (Pair) | Notes |
|---|---|---|
| New OEM (Dealer) | $400 - $700+ | Highest quality and cost. Price can be substantial from a Rolls-Royce dealer. |
| New Aftermarket | $80 - $200 | Varies widely in quality. Premium brands like Stabilus are reliable, while cheaper options may fail quickly. |
| Used OEM | $100 - $250 | Offers OEM fit and quality at a significant discount compared to new genuine parts. |
Shop labor for this job is minimal, typically 0.5 to 1 hour. Expect to pay between $100 and $250 in labor at an independent shop, and potentially more at a dealership.
Hood Strut Replacement Guide
Replacing the hood struts on these Rolls-Royce models is a straightforward task suitable for a DIYer with basic tools.
- Difficulty: 2/5 (Easy, but requires caution)
- Time: 15-30 minutes
- Tools Needed: Small flathead screwdriver, a sturdy prop rod (or a second person).
Safety First: The hoods on these vehicles are extremely heavy. Do NOT rely on a failing strut to hold the hood. Before starting, securely prop the hood open with a strong hood prop or have a helper hold it. A falling hood can cause serious injury.
Step-by-Step Instructions:
- Prop the Hood Open: Open the hood and secure it firmly in its fully open position.
- Locate the Struts: You will find one strut on each side of the engine bay, running from the body to the hood hinge area.
- Release the Retaining Clip: Each end of the strut has a small metal clip that secures it to a ball stud. Use a small flathead screwdriver to gently pry this clip outwards. You do not need to remove the clip completely, just release its tension.
- Remove the Old Strut: With the clip released, the end of the strut will pull off the ball stud. Do this for both the top and bottom ends and remove the old strut.
- Install the New Strut: Most new struts can be installed by simply snapping the end fittings onto the ball studs. No tools should be required. Ensure they are firmly seated. It's often easiest to install the cylinder-end (thicker part) onto the lower stud first.
- Repeat on the Other Side: Always replace both struts at the same time.
- Test the Hood: Carefully remove your prop rod and slowly lower the hood to ensure it operates smoothly. Test its ability to hold itself open before closing it completely.
Frequently Asked Questions (FAQ)
Will a hood strut from a Rolls-Royce Ghost fit my Phantom?
No. The Ghost (and Wraith/Dawn) uses part number 51237198451, while the Phantom uses 51237040711. They are different lengths and strengths and are not interchangeable.
Why is it important to replace hood struts in pairs?
Replacing only one strut puts uneven pressure on the hood panel, which can cause it to twist or misalign over time. The new strut will also be doing all the work, causing it to wear out prematurely while the remaining old strut will likely fail soon after.
What causes hood struts to fail?
The primary cause of failure is age and heat. Over thousands of open-and-close cycles and constant exposure to engine heat, the rubber seals inside the strut harden and crack. This allows the pressurized nitrogen gas to slowly leak out, reducing the strut's ability to provide lift.
Can I recharge my old hood struts?
No, hood struts are sealed, disposable units. They cannot be refilled or repaired and must be replaced when they fail.
Technical Specifications
OEM Part Numbers: 51237040711 51237198451
Gas-pressurized hydraulic lift support. Vehicle-specific length and pressure rating.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Rolls-Royce Phantom:
- Rolls-Royce Wraith:
- Rolls-Royce Ghost:
- Rolls-Royce Dawn: