2012-2018 Bentley Continental GTC Convertible Top Flap Covers: A Guide to a Critical, Misunderstood Part
These small, inexpensive trim panels are directly linked to the Continental GTC's notoriously complex and costly convertible top system; here's what you need to know.
- This part is NOT a bumper filler; it is a small trim cover for the convertible top mechanism, specific to GTC models.
- A damaged cover can be a symptom of a much larger, more expensive problem with the top's alignment or folding mechanism.
- The most common cause of GTC top failure is a misaligned position sensor on the driver's side, which can sometimes be fixed without new parts.
- A critical recall (NHTSA #15V688) for a loose battery cable can cause total power loss, disabling the top and creating a fire risk.
Correcting a Common Misconception: Not a Bumper Part
It is critical for buyers to understand that OEM part numbers 3W7872891B (left) and 3W7872892B (right) are not bumper filler panels. They are small trim covers for the convertible top mechanism, located near the rear decklid where the top stows away. These parts are exclusive to the Continental GTC (convertible) models from 2012-2018 and will not fit the GT coupe or Flying Spur sedan.
Symptoms of Failure
Failure can refer to the trim piece itself or, more importantly, the multi-thousand-dollar convertible top system it's attached to. A problem with this small cover can be a warning sign of a much larger issue.
Symptoms Related to the Cover Itself:
- Cosmetic Damage: Fading, discoloration, or peeling of the finish due to sun exposure.
- Physical Damage: Cracks, chips, or broken mounting tabs on the back. This can be caused by impact or by a misaligned convertible top striking the panel during operation.
- Poor Fit or Rattling: If the clips are broken or weakened, the panel may become loose and vibrate or rattle while driving.
Symptoms Related to the GTC Convertible Top System:
These are far more serious issues that GTC owners frequently encounter. A damaged top flap cover can sometimes be the first visible sign of these problems.
- Top Operation Halts Mid-Cycle: The top may start to open or close but stop partway through the process, often before the tonneau cover opens.
- Scraping Noises: A misaligned top frame can cause the fabric or rear bow to scrape against the body or the tonneau cover, causing damage to both the top and the vehicle's paint.
- 'Roof Fault' Warning on Dash: The car's computer will display a warning message when it detects a problem with a sensor, latch, or motor in the system.
- Headliner Snagging: The fabric headliner can get caught on components like the frame position sensor, preventing the top from folding correctly. This can lead to broken guide straps.
Pro Tip: The single most common cause of a 'Roof Fault' error on the GTC is a position sensor on the driver-side frame rail (Part No. 3W7959613B 🎬 Watch: How to fix this common position sensor fault). The gears inside this sensor can skip a tooth, causing the system to lose track of the top's position. Mechanics and owners have found that realigning the dots on the internal gears and securing the sensor's cover with strong tape can often resolve the issue without needing a new part.
Known Issues, Recalls, and Technical Bulletins
NHTSA Recall 15V688: Loose Battery Cable Connection
While there are no recalls for the top flaps themselves, a critical safety recall affects the power top's reliability. On certain 2012-2015 Continental GTC models, a battery cable connection at the firewall can become loose. This can lead to a sudden and total loss of electrical power, potentially causing a fire. An electrical failure will render the power convertible top inoperable, forcing the use of the emergency manual closing procedure. Owners should ensure this recall (Bentley code RE15/15) has been performed on their vehicle.
Systemic Convertible Top Failures
The 2nd generation Continental GTC is well-known for convertible top issues. The complex system of straps, cables, and bows can fail with age.
- Broken Straps and Cables: Elastic straps and guide cables that help fold the top neatly can break. When this happens, the top can bunch up, get tangled in the mechanism, and cause the frame bows to bend.
- Expensive Repairs: Once the frame is bent, a simple fabric replacement is not enough. Many independent specialists report that the only lasting fix is a complete replacement of the top assembly, a job that can cost upwards of $25,000. 🎬 See: Bentley GTC roof frame repair and fabric replacement
Buying a Used Convertible Top Flap Cover
Given the low cost of a new OEM part, buying used is primarily about availability. A used OEM part is a perfectly acceptable replacement. Here’s what to look for:
- Inspect All Mounting Clips: The most important check is on the back of the panel. Ensure all plastic mounting clips and tabs are present and free of cracks. Broken clips are the most common reason for replacement.
- Check for Scratches and Gouges: Examine the face of the panel for deep scratches. Minor scuffs may be acceptable, but deep gouges could indicate the convertible top has been scraping against it, pointing to a larger alignment problem.
- Confirm the Side: Double-check that you are buying the correct side for your needs. 3W7872891B is for the left (driver's) side and 3W7872892B is for the right (passenger's) side in the US market.
- Ask About the Donor Vehicle: If possible, ask the recycler if the donor car showed any signs of convertible top failure. A pristine cover from a car with a failed top is fine, but a damaged cover strongly suggests a significant mechanical issue with the top frame.
Cost Comparison
These specific covers are surprisingly inexpensive, but labor for any work on the convertible top system can be very high.
| Part/Service | Estimated Cost | Notes |
|---|---|---|
| New OEM Cover | $25 - $40 | Can have long lead times from the dealer. |
| Used OEM Cover | $20 - $35 | A cost-effective option if available. |
| New Aftermarket | Not Available | Aftermarket manufacturers do not produce this specific trim piece. |
| Shop Labor (Cover Only) | $50 - $100 | A very quick job if only swapping the cover. Most shops will have a 0.5 or 1.0-hour minimum charge. |
| Shop Labor (Top Diagnosis) | $300 - $1,000+ | If the cover was damaged by the top, diagnosing the root cause is a specialist job and can be very time-consuming. |
Installation Difficulty
- Rating: 1 out of 5
- Estimated Time: 5 minutes
- DIY Feasible: Yes
Replacing the cover itself is extremely easy. It is designed to be removed and typically just snaps into place. You may need a plastic trim removal tool to gently pry the old one off without scratching the paint. However, this low difficulty rating applies only to swapping the plastic cover.
Warning: Any diagnosis or repair of the convertible top mechanism itself is extremely difficult (5/5) and should not be attempted by a DIY mechanic. The system is complex, and improper handling can cause thousands of dollars in damage. Calibrating new sensors requires dealer-level diagnostic tools.
Frequently Asked Questions (FAQ)
Is this part really a 'Bumper Filler Panel'?
No. This is a common error in some parts catalogs. The correct name is 'cover, catch' and it is a trim piece for the convertible top stowage area, not the front or rear bumper.
Why did my convertible top stop working?
The most common reason is a failure of the driver-side position sensor, which can often be fixed by realigning its internal gears. Other causes include broken straps, hydraulic leaks, or a general electrical failure, which could be related to a known battery cable recall.
Can I replace this cover myself?
Yes, replacing just the small plastic cover is a very simple task that involves prying the old one off and snapping the new one in. No special tools are required beyond a plastic trim tool to protect your paint.
How do I close my GTC's roof if the power fails?
There is an emergency T-handle tool located behind the rear center armrest. Using it to manually close the roof is a complex, multi-step process that requires two people to avoid damaging the vehicle. 🎬 Watch: Step-by-step manual roof closing procedure You should consult the owner's manual or a video guide for the exact procedure.
Helpful Videos
Technical Specifications
OEM Part Numbers: 3W7872891B 3W7872892B
Material: Plastic. Location: Rear Tonneau Cover / Convertible Top Stowage Area. Fitment: Bentley Continental GTC (Convertible) ONLY.
We Have This Part in Stock
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.
- Bentley Continental:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Correcting a Common Misconception: Not a Bumper Part
- Symptoms of Failure
- Symptoms Related to the Cover Itself:
- Symptoms Related to the GTC Convertible Top System:
- Known Issues, Recalls, and Technical Bulletins
- NHTSA Recall 15V688: Loose Battery Cable Connection
- Systemic Convertible Top Failures
- Buying a Used Convertible Top Flap Cover
- Cost Comparison
- Installation Difficulty
- Frequently Asked Questions (FAQ)
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