2018-2020 Buick Regal Grille: A Guide to Sportback, GS, TourX & ACC Versions
This guide details the crucial differences between grille types for the Regal Sportback, GS, and TourX, especially for models with Adaptive Cruise Control.
- Compatibility is critical: You must get the correct grille for your specific trim (Sportback, GS, or TourX) AND whether you have Adaptive Cruise Control (ACC).
- ACC-equipped models use a special, radar-transparent emblem; using a standard grille will block the sensor and disable the system.
- Replacement is not a simple swap; it requires the complete removal of the front bumper cover.
- If the ACC radar sensor is disturbed during replacement, a professional ADAS recalibration is strongly recommended for safety.
Grille Variations: The Key to Compatibility
Choosing the correct grille for a 2018-2020 Buick Regal is more complex than on most vehicles. Fitment depends entirely on the vehicle's trim level (Sportback, GS, or TourX) and whether it is equipped with Adaptive Cruise Control (ACC). Using the wrong grille can lead to improper fit, a disabled cruise control system, and warning lights on your dashboard.
Sportback Models
The Regal Sportback is the most common trim. It has several grille options that are not interchangeable.
- Standard Grille (Non-ACC): For vehicles without Adaptive Cruise Control. These grilles feature a standard Buick tri-shield emblem. They are often available in different finishes, like standard chrome or a "Black Ice" chrome.
- ACC Grille: For vehicles with Adaptive Cruise Control. The Buick emblem on these grilles is a special, smooth-faced piece that is transparent to radar waves. The ACC radar sensor sits directly behind it. Using a standard grille with a metallic emblem will block the sensor and cause the ACC system to fail.
GS Models
The high-performance Regal GS has a unique, more aggressive grille design that is not interchangeable with Sportback or TourX models. It also has specific versions for ACC.
- Standard GS Grille (Non-ACC): Features a standard emblem and often includes red "GS" badging.
- GS ACC Grille: Like the Sportback, this version uses the special radar-transparent emblem for the ACC sensor.
TourX Models
The Regal TourX is a wagon variant with its own specific grille design to match its unique front bumper and cladding. These are not interchangeable with Sportback or GS grilles.
- Standard TourX Grille (Non-ACC): Designed for the wagon body style without the ACC option.
- TourX ACC Grille: Features the necessary radar-transparent emblem for the Adaptive Cruise Control system.
Warning: The Buick emblem is often the key identifier. If your vehicle has ACC, the emblem is part of the sensor system. Do not swap a standard metallic emblem onto an ACC grille, as it will block the radar and disable the feature.
Symptoms of a Bad or Failing Grille
Failure of a grille is typically straightforward, but on ACC-equipped models, the symptoms can be both physical and electronic.
- Physical Damage: The most common symptom is visible damage from impacts with road debris, animals, or minor collisions. This includes cracks in the plastic, broken mounting tabs, peeling chrome, or a shattered frame.
- Adaptive Cruise Control Malfunctions: On vehicles with ACC, damage to the grille can cause problems even if the sensor itself appears unharmed. A cracked or misaligned grille can shift the position of the radar sensor, causing it to aim incorrectly. This can lead to an "ACC Unavailable" message, the cruise control system deactivating unexpectedly, or inaccurate distance readings.
- Active Grille Shutter Errors: Some Regals are equipped with active grille shutters located behind the main grille. While a separate system, a severe impact that damages the main grille can also damage the shutter assembly, leading to a check engine light and potential overheating or overcooling issues.
- Loose Fit or Rattling: Broken mounting tabs can cause the grille to become loose, resulting in rattling or buzzing noises, especially at higher speeds. A very loose grille could detach from the vehicle.
Buying a Used 2018-2020 Regal Grille
A used OEM grille is often an excellent value, providing the same fit and quality as a new part. However, careful inspection is critical, especially with the various trim and technology options.
- Verify the Part Number: This is the most important step. Match the part number from your original grille to the used one. If you don't have the original part, a dealer can look up the correct number using your VIN. Many online GM parts diagrams differentiate between models with and without ACC.
- Inspect All Mounting Tabs: Carefully check the top, bottom, and side tabs. These plastic clips are essential for a secure fit. Even one broken tab can cause a rattle or poor alignment.
- Check for Hidden Cracks: Look closely at the back of the grille. Small cracks from an impact might not be obvious from the front but can compromise the part's structural integrity. Flex the grille slightly to reveal any hidden fractures.
- Examine the Finish: Check chrome or painted surfaces for peeling, bubbling, or deep scratches. For "Black Ice" chrome grilles, ensure the finish is consistent.
- Confirm ACC Compatibility: If your car has Adaptive Cruise Control, you MUST buy a grille designed for it. Look for the smooth, flat-surfaced emblem. A used ACC grille should ideally come with the emblem, as it's a specific, costly part. A standard grille with a raised, metallic emblem will not work.
Pro Tip: For this part, a used OEM grille is almost always a better choice than a cheap aftermarket one. Aftermarket grilles often have fitment issues, with misaligned tabs and gaps. More importantly, they may not correctly mount the ACC sensor, leading to persistent electronic faults.
Known Issues, TSBs, and Recalls
As of mid-2024, there are no specific recalls or Technical Service Bulletins (TSBs) from Buick directly related to the grilles on 2018-2020 Regal models. However, there are several recalls for the vehicle itself, including for issues with the service brakes and seats, which are unrelated to the grille.
Replacement Overview
Replacing the grille on a 2018-2020 Buick Regal is a moderately difficult job that requires removing the entire front bumper cover.
- Difficulty: 3 out of 5
- Estimated Time: 1.5 - 2.5 hours
- Tools Required: Socket set, screwdrivers, trim removal tools, and potentially wheel removal tools to access fender liner screws.
Basic Steps:
- Open the hood and remove the upper radiator sight shield (the plastic cover over the radiator support).
- Remove the screws and clips securing the top of the bumper cover to the core support.
- Remove the screws in each front wheel well that attach the bumper cover to the fender.
- Remove the screws and clips along the bottom edge of the bumper cover.
- Carefully pull the sides of the bumper cover away from the fenders to release the clips.
- With a helper, pull the bumper cover forward. Disconnect any fog light or sensor wiring harnesses before setting it aside.
- The grille is held to the inside of the bumper cover with a series of clips and screws. Carefully release these to remove the old grille.
- Install the new grille, ensuring all clips are fully seated, and reverse the process to reinstall the bumper.
Calibration Warning: If you are replacing a grille on a car with Adaptive Cruise Control, the radar sensor may need to be professionally recalibrated after installation, even if you reuse the old sensor. Failure to do so can result in a non-functional or dangerously inaccurate ACC system.
Cost Comparison
| Part Type | Estimated Cost |
|---|---|
| New OEM | $110 - $400 |
| New Aftermarket | $85 - $160 |
| Used OEM | $75 - $250 |
| Shop Labor | $150 - $300 |
Note: Prices are estimates and can vary based on trim level (GS and ACC grilles are typically more expensive), supplier, and condition. Labor costs vary by region.
Frequently Asked Questions (FAQ)
Can I swap a GS grille onto my Sportback?
No, the GS grille has a different shape and mounting points designed to fit the unique GS front bumper cover. It is not a direct fit for a standard Sportback or TourX model.
What happens if I use the wrong grille on my car with Adaptive Cruise Control?
If you install a non-ACC grille (with a standard metallic emblem) on a car that has ACC, the radar sensor will be blocked. This will disable the system and trigger a warning message on your dashboard. You must use a grille with the correct radar-transparent emblem.
Does the grille come with the emblem?
It depends. New OEM grilles are sometimes sold without the emblem, which must be purchased separately. Used grilles often include the emblem. For ACC models, the emblem is a critical and expensive part of the assembly, so confirm it is included when buying used.
Is ACC recalibration always necessary after replacing the grille?
It is highly recommended. The position of the radar sensor is critical for its accuracy. Removing and reinstalling the bumper and grille can slightly alter the sensor's alignment. A professional shop with ADAS calibration equipment should check the alignment to ensure the system functions safely and correctly.
Technical Specifications
OEM Part Numbers: 13491164 13491165 13491167 13491168 13491272 13491362 13496186 39020278 39104440 39107129 39107133 39107134 39112404 39144987 84258414 39116386 39108221 39150021
Varies by trim (Sportback, GS, TourX) and option (with or without Adaptive Cruise Control).
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: