2018-2020 Regal TourX Rear Bumper Bracket: Keyless Entry Antenna Compatibility
This is the definitive guide to the rear bumper mounting bracket for the 2018-2020 Buick Regal TourX, focusing on the critical compatibility difference for models with and without the keyless entry antenna.
- The single most important factor is verifying if your Regal TourX has the rear keyless entry antenna; this determines which bracket you need.
- Failure is almost always caused by physical impact. The main symptoms are a sagging, misaligned, or rattling rear bumper cover.
- When buying a used bracket, check for cracks and warping, and visually confirm it has the correct configuration for the keyless entry antenna.
- Replacement is a straightforward DIY job, with the main challenge being the careful removal and reinstallation of the bumper cover.
Function and Importance
The rear bumper mounting bracket on a 2018-2020 Buick Regal TourX serves as the primary connection between the flexible bumper cover and the rigid structure of the car. Without it, the bumper cover would sag, rattle, and be unable to maintain its shape, leading to poor panel gaps and an unappealing look. These brackets are designed to be the first point of failure in a minor rear-end collision, absorbing and distributing impact energy to protect more critical and expensive components. Their precise fit is essential for maintaining the vehicle's original appearance and aerodynamic efficiency.
Critical Compatibility Warning: The most important factor when replacing this bracket is to determine if your vehicle is equipped with the keyless entry antenna located in the rear bumper area. One version of the bracket (GM Part Number 39157946) is specifically designed with a mounting point for this antenna. The other version, for cars without this feature, will not have this provision. Installing the wrong bracket will either leave the antenna unsecured or be impossible without modification.
Symptoms of a Bad or Failing Bumper Bracket
Failure of a bumper bracket is almost always due to physical damage from a collision or from degradation over time. The symptoms are typically easy to spot.
- Poor Bumper Alignment: The most common symptom is a sagging or misaligned bumper cover. You may notice uneven gaps between the bumper and the taillights or the rear quarter panels.
- Loose Bumper Cover: The bumper may feel loose or wobble if you push on it. In severe cases, it might flap or vibrate, especially at highway speeds.
- Rattling or Clunking Noises: A broken or loose bracket can cause the bumper assembly to rattle or clunk when driving over bumps or on rough roads.
- Visible Damage: After any rear-end impact, even a minor one, the bracket may be cracked, bent, or have broken mounting tabs. This damage can be hidden behind the bumper cover and requires inspection to find.
Buying a Used Bumper Mounting Bracket
Given the rarity of the Regal TourX, a used OEM bracket is often the most practical and cost-effective solution. Here’s what to look for to ensure you get a good part.
- Verify the Part Number and Antenna Mount: This is the most critical step. First, confirm if your car has the rear keyless entry antenna. If it does, you must buy the bracket that includes the specific mounting point for it. Cross-reference the OEM part number (39157946 for the right side with antenna) if possible. Ask the seller for clear photos of the entire bracket to visually confirm the presence or absence of the antenna holder.
- Inspect for Cracks: Carefully examine the entire bracket, paying close attention to the mounting holes and corners where the plastic is under the most stress. Even small hairline cracks can compromise the bracket's structural integrity and lead to premature failure.
- Check for Warping: Lay the bracket on a flat surface to check for any signs of bending or warping. A bracket that isn't perfectly straight was likely removed from a wrecked vehicle and will not allow the bumper to align correctly.
- Examine Mounting Tabs: Ensure all mounting tabs and clip points are intact and free of damage. These are essential for securing the bumper cover properly. Broken tabs are a major red flag.
- Why Used OEM is a Good Choice: For a simple structural part like this, a used OEM bracket that passes inspection is a smart buy. It guarantees perfect factory fitment, which is often a problem with cheap aftermarket parts. Since this part's failure is due to impact, not wear, a used bracket from an undamaged vehicle is just as good as a new one.
Known Issues, Recalls, and TSBs
As of mid-2024, there are no specific recalls or Technical Service Bulletins (TSBs) from GM or the NHTSA that directly address the rear bumper mounting brackets for the 2018-2020 Buick Regal TourX. Recalls for this vehicle pertain to issues like brake system software, seat belt routing, and seat frame welds. While some owner complaints mention powertrain or electrical issues, there are no widespread reports of premature bumper bracket failure outside of collision-related damage.
Replacement Information
Replacing the rear bumper bracket is a manageable DIY task for someone with basic mechanical skills and tools.
- Difficulty: 2 out of 5.
- Estimated Time: 1-2 hours.
- Tools Required: Socket set, trim removal tools, T15 Torx driver, 7mm socket/driver.
The general process involves carefully removing the rear bumper cover to access the brackets. 🎬 Watch this video on removing the rear bumper cover. This typically includes removing screws inside the wheel wells (T15 Torx), under the bumper (7mm screws), and fasteners inside the trunk/hatch area. Once the bumper cover is off, the bracket itself is held to the car's body with just a few bolts. The key is to be patient and gentle when removing the bumper cover to avoid scratching the paint or breaking plastic clips.
Pro Tip: When removing the bumper cover, lay down a soft blanket or piece of cardboard to protect it from scratches. Having a helper makes handling the large, flexible bumper cover much easier and safer.
| Part/Service | Estimated Cost |
|---|---|
| New OEM Bracket (Dealer) | $70 - $120 |
| New Aftermarket Bracket | $40 - $80 (Availability may be limited) |
| Used OEM Bracket | $25 - $60 |
| Shop Labor for Replacement | $150 - $250 |
Can I drive with a broken bumper bracket?
Yes, but it is not recommended for long. A broken bracket means the bumper is not properly secured, which can be a safety hazard if it detaches while driving. It also means the bumper will not provide its intended level of protection in a minor collision. A loose or sagging bumper can also lead to further damage to the paint and surrounding body panels.
Is the left (driver side) bracket the same as the right (passenger side)?
No, they are not interchangeable. Bumper brackets are side-specific, meaning you must order the correct part for the side of the vehicle you are repairing. The right-side bracket is a mirror image of the left-side bracket.
Where exactly is the keyless entry antenna located?
In vehicles with this option, one of the keyless entry antennas is mounted behind the rear bumper cover, typically on or very near the support bracket. This allows the system to detect the key fob when you are near the rear of the vehicle for features like a hands-free liftgate.
Will a bracket from a Regal Sportback fit my TourX?
It is highly unlikely. While the Sportback and TourX are based on the same platform, the rear bumper designs, body lines, and mounting points are different. Always use parts specified for the Regal TourX to ensure proper fitment.
Helpful Videos
Technical Specifications
OEM Part Numbers: 39157946
Material: Plastic. Side: Rear Right (Passenger). Compatibility Note: Specific version required for models equipped with keyless entry antenna.
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.
- Buick Regal TourX: