2020-2023 Buick Encore GX Front Bumper: A Guide to Sport Touring, Park Assist, and Part Number Variations
This guide decodes the complex variations of the 2020-2023 Buick Encore GX front bumper to ensure you get the right part for your vehicle's specific options.
- The correct bumper is determined by two options: the Sport Touring (ST) package and Automatic Parking Assist (UKG). You must verify these before buying.
- Even minor bumper damage can cause critical safety systems like Park Assist and Forward Collision Alert to fail.
- After replacement, the ADAS sensors in the bumper must be professionally calibrated with special equipment for the safety systems to function correctly.
- When buying used, the condition of the mounting tabs and sensor brackets is more important than the cosmetic finish, as the part will need to be repainted anyway.
Decoding Encore GX Front Bumper Variations
Choosing the correct front bumper for a 2020-2023 Buick Encore GX is more complicated than for most vehicles. The correct part depends entirely on two key factory options: the Sport Touring (ST) package and the Automatic Parking Assist (RPO code: UKG) feature. Using the wrong bumper will result in parts not fitting correctly or safety features being disabled. There was also a design change in mid-2020, with later parts superseding earlier ones.
Before purchasing, you must verify your vehicle's configuration. You can typically find your vehicle's option codes on the Service Parts Identification sticker, located in the glove box.
| Vehicle Configuration | Key Part Numbers | Notes |
|---|---|---|
| With Sport Touring Package With Automatic Park Assist (UKG) |
42774799 | This is the '2nd design' bumper for ST models equipped with the self-parking feature. |
| With Sport Touring Package Without Automatic Park Assist (UKG) |
42774800 (replaces 42740454, 42751970, 42758323) | This is the '2nd design' bumper for the most common ST models that do not have the self-parking feature. |
| Without Sport Touring Package With Automatic Park Assist (UKG) |
42774798 (replaces 42690747, 42751967) | This bumper is for non-ST trims (like Preferred or Essence without the Sport Package) that are equipped with the self-parking feature. |
| Without Sport Touring Package Without Automatic Park Assist (UKG) |
42751966, 42690743 | This is the base model bumper for vehicles without the Sport Touring appearance package or advanced parking sensors. |
Warning: The presence of Surround View (RPO code: UV2) is also a factor, but it is often tied to the Automatic Parking Assist option. Always verify your specific options before buying.
Symptoms of a Damaged Front Bumper
While major collision damage is obvious, even minor impacts can cause problems that aren't just cosmetic.
- Visible Cracks, Scuffs, or Punctures: This is the most common symptom. Deep cracks or punctures compromise the bumper's ability to protect other components and can allow water to reach sensitive electronics.
- Poor Panel Gaps: An improper fit against the fenders, hood, or headlights can indicate broken or bent mounting tabs, which are critical for secure installation.
- Warning Lights or ADAS Malfunctions: A key symptom on modern cars. An impact can misalign or damage sensors mounted in the bumper. You may see messages like "Service Park Assist," "Forward Collision Alert Unavailable," or see flashing lights for Lane Keep Assist. This is a serious issue that affects vehicle safety.
- Vibration or Rattling Noises: Loose or broken bumper components can cause noises, especially at speed. A technical service bulletin (20-NA-154) identified a booming noise that required partial removal of the front bumper fascia to correct, indicating how integrated these parts are.
Buying a Used 2020-2023 Encore GX Front Bumper: A Checklist
A used OEM bumper is often the best value, offering factory fit and material quality that cheap aftermarket parts can't match. However, you must inspect it carefully.
- Confirm Your Vehicle's Options: Before you even start looking, know if you have the Sport Touring package and Automatic Park Assist (UKG). This is the most important step.
- Inspect All Mounting Points: Carefully check every tab, clip, and slot around the perimeter of the bumper. Pay special attention to the tabs that connect to the fenders and the mounting points under the headlights. If these are broken, cracked, or have been poorly repaired with glue, the bumper will never fit correctly.
- Check Sensor Brackets: Look on the inside of the bumper. The small plastic brackets that hold the parking sensors must be intact. If they are broken or missing, you cannot securely mount your sensors, which will lead to system errors.
- Look for Signs of Previous Repair: Check for sanding marks, inconsistent textures, or areas where the paint looks thicker. A bumper repaired with excessive body filler can crack easily and may not have the correct flexibility.
- Ignore the Color: A used bumper will almost never perfectly match your car's paint. Plan on having the part professionally painted. The goal is to find a structurally perfect bumper, not one in the right color.
Pro Tip: Aftermarket bumpers often have poor fitment, leading to uneven panel gaps. They are also made from a different grade of plastic that can be more brittle than the OEM part. For a vehicle with complex body lines and sensor mounts like the Encore GX, a quality used OEM part is almost always a better choice than a new aftermarket one.
Known Issues, Recalls, and Service Bulletins
As of mid-2024, there are no specific NHTSA recalls for the front bumper assembly of the 2020-2023 Buick Encore GX. However, several related items are worth noting:
- NHTSA Recall A212335470: Pertains to an emergency jack that can fracture, which is unrelated to the bumper but relevant to the vehicle model years.
- NHTSA Recall A202307260: Addresses a potential loss of electronic brake boost assist due to sensor contamination. This is not a bumper issue but highlights the sensitivity of vehicle sensors.
- TSB 20-NA-154: Technicians may need to remove front bumper components to access and replace lower radiator mount bushings that can cause a booming noise or vibration.
- ADAS-Related TSBs: Bulletins exist for issues like a "Service Rear Vision System" message or inoperative forward-facing safety systems, which can sometimes be caused by bumper damage or improper sensor installation.
Replacement Overview & ADAS Calibration
Physically swapping the front bumper cover is a moderately difficult job for an experienced DIYer. However, the requirement for sensor calibration makes it a more complex task overall.
- Difficulty: 4 out of 5
- Estimated Time: 2-4 hours for physical removal and installation.
- DIY Feasible: The mechanical swap is feasible, but the final, critical step is not.
Warning: After replacing the front bumper, any ADAS features with sensors housed in the bumper or grille area (like Park Assist or Forward Collision Alert) must be professionally calibrated. This process requires specialized targets and a diagnostic scan tool that most DIYers do not own. Skipping calibration can cause safety systems to work incorrectly or not at all, increasing the risk of a collision.
Cost Comparison
Prices can vary significantly based on the specific part number and your location. The costs below are estimates for the main bumper cover only and do not include grilles, emblems, or sensors.
| Part Type | Estimated Price Range |
|---|---|
| New OEM | $700 - $1,000 |
| New Aftermarket | $400 - $700 |
| Used OEM | $350 - $650 |
| Shop Labor (Install & Paint) | $600 - $1,100 |
| ADAS Calibration | $250 - $500 |
Frequently Asked Questions (FAQ)
Do I need to get a used bumper painted?
Yes. Even if a used bumper is the same color, it will have come from a different paint batch and have different sun exposure. For a perfect match, a body shop will need to sand, prime, and paint the bumper using your car's specific paint code, and often blend the new paint into the adjacent fenders.
Can I install a Sport Touring (ST) bumper on my non-ST Encore GX?
This is not recommended. The ST bumper is designed to align with different grilles, trim pieces, and potentially different fender liners. Attempting to swap them would likely require changing multiple other parts for correct fitment.
Do used bumper assemblies come with the sensors?
Almost never. A used bumper assembly is typically just the plastic cover. You will need to carefully transfer the parking sensors, cameras, wiring harness, and foam absorber from your old bumper to the new one.
Is a small crack a big deal?
It can be. A crack compromises the structural integrity and can spread over time with vibration and temperature changes. More importantly, if a crack is near a sensor mounting point, it may prevent the sensor from being held securely, leading to ADAS errors.
Technical Specifications
OEM Part Numbers: 42774800 42740454 42751970 42758323 42774799 42774798 42690747 42751967 42751966 42690743 42592125 42592136 42621359 42660290 42716021 42716022 42716025 42716026 42737504
Material: Thermoplastic. Finish: Primed (Paint to Match).
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 Encore GX: