2020-2023 Buick Encore GX Rear Bumper Absorber: Fitment, Failures, and Replacement

Critical Fitment Warning: 2020-2023 'First Design' Models Only

This rear bumper absorber, OEM part number 42664664, fits Buick Encore GX models made from 2020, 2021, 2022, and 2023. For the 2024 model year, Buick gave the Encore GX a significant facelift, which included redesigned front and rear bumpers. Therefore, this part will NOT fit 2024 or newer Encore GX models. The 2020-2023 models are often referred to as the '1st Design' in parts catalogs. Always verify your vehicle's model year before purchasing.

Symptoms of a Damaged Bumper Absorber

A bumper absorber does not wear out over time like a brake pad or a suspension shock absorber. It only fails when it's damaged in a collision. Because it's hidden behind the bumper cover, you won't see the damage to the absorber itself without removing the bumper. However, there are clear external signs that indicate the absorber is likely compromised:

• Visible Bumper Damage: If your rear bumper cover is cracked, dented, or deformed from an impact, the absorber underneath has almost certainly been crushed and needs to be replaced. Even a minor-looking impact can damage the absorber.
• Loose or Misaligned Bumper Cover: The absorber provides structural support for the thin plastic bumper cover. If the absorber is broken or missing, the bumper cover may feel flimsy, rattle when you tap on it, or sag, creating uneven gaps with the taillights and quarter panels.
• Broken Mounting Tabs: During a collision, the force can break the plastic tabs that hold the bumper cover to the absorber and the absorber to the steel reinforcement bar. This will also cause the bumper cover to be loose.

Note: This part is often confused with a suspension "shock absorber," which controls ride quality and vehicle bounce. A damaged bumper absorber has no effect on how the car drives or handles; its function is purely for impact safety.

Known Issues, TSBs, and Recalls

As of mid-2024, there are no Technical Service Bulletins (TSBs) or safety recalls from the National Highway Traffic Safety Administration (NHTSA) specifically for the rear bumper absorber on the 2020-2023 Buick Encore GX.

While recalls have been issued for these model years for other components—such as the emergency jack (NHTSA 21V440), front seat bolts, and various electronic modules—none pertain to the integrity or performance of the rear bumper assembly.

Buying a Used Rear Bumper Absorber: What to Check

A used OEM bumper absorber can be a great value, provided it comes from a vehicle that was not involved in a rear collision. Because this is a single-use safety part, a recycled absorber that has already been compressed is useless. Here is what to inspect before buying:

1. Check for Compression or Cracks: Look at the part from all angles under good light. There should be no cracks, tears, or areas that look permanently compressed or dented. The cellular structure of the foam or plastic should be uniform. Any sign of impact means the part should be rejected.
2. Inspect All Mounting Points: The absorber attaches to both the steel reinforcement bar behind it and the plastic bumper cover in front of it. Carefully check all mounting holes, tabs, and clips. Ensure none are cracked, broken off, or stressed (indicated by whiteish discoloration in the plastic). A broken tab can prevent the bumper cover from sitting flush.
3. Verify the Part Number: If possible, confirm the part number is 42664664 or that the seller guarantees fitment for a 2020-2023 Encore GX.
4. Why Choose Used OEM?: A genuine used GM part that is undamaged offers a guaranteed factory fit and is made from materials engineered to meet specific crash-test standards. Some lower-cost aftermarket parts may not fit as precisely or offer the same level of impact absorption as the original.

Replacement Cost & Difficulty

Replacing the rear bumper absorber is a straightforward job, but it requires care to avoid scratching the painted bumper cover. The main task is the removal and reinstallation of the bumper cover itself.

• Installation Difficulty: 3/5 (Moderate)
• Estimated Time: 1.5 - 2.5 hours
• DIY Feasible: Yes, for individuals comfortable with basic hand tools and removing large plastic body panels.

Cost Comparison

High-Level Replacement Steps

While specific steps may vary slightly by trim, the general process for removing the rear bumper cover is as follows, based on videos for similar models:

1. Open the rear hatch. You may need to remove some interior trim panels to access the upper bumper bolts.
2. Remove the Torx screws and plastic clips securing the bumper cover inside each rear wheel well.
3. Remove the plastic clips and/or Torx screws along the bottom edge of the bumper.
4. Remove the Torx bolts located under the taillights or at the top corners of the bumper assembly.
5. Carefully unsnap the bumper cover from the plastic guide brackets on each side of the vehicle, starting at the wheel well and pulling outward.
6. If the vehicle has parking sensors, disconnect the single wiring harness before fully removing the bumper.
7. With the cover removed, the absorber is now visible, typically clipped or bolted onto the steel reinforcement bar. Swap the old one for the new one.
8. Reinstallation is the reverse of removal. Be sure to reconnect any sensor harnesses.

Frequently Asked Questions (FAQ)

Technical Specifications