2013-2020 Trax & 2013 Encore Front Bumper Shock: A Collision Repair Guide
Learn how to inspect, replace, and choose the right used front bumper shock for your 2013-2020 Chevrolet Trax or 2013 Buick Encore after a minor collision.
- This part is a one-time-use safety component; it MUST be replaced if it shows any sign of compression or damage from an impact.
- The driver's side (42392684) and passenger's side (42392685) parts are not interchangeable.
- When buying used, only purchase a part that is confirmed to be from a non-front-end collision vehicle and shows zero signs of crushing.
- There are no specific recalls or TSBs for this part, but replacement is essential for restoring the vehicle's crash safety.
Understanding This Part: Bumper Shock vs. Bumper Absorber
When repairing front-end damage, it's easy to get confused by similar terms. The part covered in this guide is the Bumper Shock (also called a Rail End Absorber). There is one on the driver's side and one on the passenger's side, connecting the metal bumper beam to the vehicle's frame. It is a distinct, separate part from the large piece of styrofoam, often called the Bumper Impact Absorber, that sits directly behind the plastic bumper cover. This guide focuses only on the frame-mounted shocks.
Symptoms of a Damaged Bumper Shock
A bumper shock does not fail from normal use, age, or mileage. It is only damaged by a physical impact. The symptoms are purely visual and will be obvious after even a minor front-end collision.
- Visible Crushing or Deformation: The most obvious sign is that the shock has been compressed or looks shorter than its un-damaged counterpart. It is designed to crumple and absorb energy.
- Bumper Misalignment: If the front bumper appears pushed in on one side, sags, or is not flush with the fenders, the underlying shock is likely crushed.
- Cracked Housing: The body of the shock may have visible cracks or breaks, especially around the mounting points where it bolts to the frame and bumper reinforcement.
- Broken Mounting Tabs: The points where bolts pass through the shock can easily break off during an impact, leaving the bumper loose.
Warning: A damaged bumper shock provides no protection in a subsequent impact. Even if the bumper cover is undamaged, a compressed shock underneath means your vehicle's frame is vulnerable.
Buying a Used Bumper Shock: What to Check
Because this is a simple, non-electronic part, a used OEM bumper shock from an undamaged vehicle is an excellent, cost-effective option. It provides the same fit and safety performance as a new part. However, careful inspection is critical.
- Confirm It Is Not Compressed: This is the most important check. A used bumper shock MUST be in its original, uncrushed state. Compare it to photos of a new part or the undamaged shock from the other side of your vehicle. If it looks even slightly compressed or deformed, it is useless and unsafe. It is a one-time-use part.
- Inspect for Cracks: Carefully check the entire part, especially around the mounting holes and any welded seams. Stress from a minor impact elsewhere on the donor car could cause hairline cracks that will fail in a future collision.
- Check for Side-to-Side Compatibility: The driver's side (left) and passenger's side (right) shocks are not interchangeable. They are mirror images of each other. Verify you are buying the correct side for your repair.
- Verify the Part Number: The best way to ensure a match is to use the OEM part number. The driver's side is part number 42392684 and the passenger's side is 42392685.
Pro Tip: When sourcing a used bumper shock, ask the seller to confirm the donor vehicle was not involved in a front-end collision. A part from a rear-ended or side-impacted vehicle is ideal.
Known Issues, TSBs, and Recalls
There are no recalls or Technical Service Bulletins (TSBs) from General Motors or the NHTSA specifically related to the front bumper shocks on the 2013-2020 Chevrolet Trax or 2013 Buick Encore.
However, these vehicles have been subject to other important safety recalls. Owners should check their Vehicle Identification Number (VIN) on the NHTSA website for open recalls. Notable recalls for these models include issues with front lower control arms, seat belts, and steering wheel fasteners.
Replacement Difficulty and Procedure
Replacing a front bumper shock is usually done as part of a larger collision repair. The process requires removing the front bumper cover and the main bumper reinforcement beam.
- Difficulty: 3 out of 5 (Moderate)
- Estimated Time: 1.5 - 2.0 hours
- DIY Feasible: Yes, for those comfortable with removing body panels.
General Replacement Steps:
- Remove the Front Bumper Cover: This involves removing numerous screws, clips, and fasteners inside the wheel wells, under the front edge, and on top near the grille. Disconnect any fog light or sensor wiring before fully removing the cover.
- Remove the Bumper Reinforcement Beam: The metal beam that runs across the front of the vehicle is bolted to the two bumper shocks. Unbolt the beam and set it aside.
- Unbolt the Damaged Bumper Shock: The shock is bolted directly to the end of the frame rail. Remove these bolts.
- Install the New Shock: Bolt the new or undamaged used shock onto the frame rail. Torque the bolts to factory specifications.
- Reassemble: Re-install the bumper reinforcement beam, followed by the front bumper cover and all associated trim and wiring.
Cost Comparison
Prices for these parts can vary. The following is an estimate to help you understand the value of a used OEM part.
| Part Type | Estimated Cost | Notes |
|---|---|---|
| New OEM | $140 - $170 per side | Purchased from a GM dealership or online OEM parts retailer. Prices vary by side. |
| New Aftermarket | Not Widely Available | Direct aftermarket replacements for these specific rail end absorbers are uncommon. Parts listed as 'absorbers' are typically the center foam piece. |
| Used OEM | $50 - $90 per side | Sourced from a salvage yard or online recycler. Price depends on condition and availability. |
| Shop Labor | $150 - $250 | Based on 1.5-2.0 hours of labor at a typical shop rate. Cost will be higher if part of a larger insurance repair. |
Technical Specifications & Part Numbers
Ensuring you have the correct part number is the best way to guarantee fitment for your Chevrolet Trax or Buick Encore.
| Side | Primary OEM Part Number | Supersedes Part Number |
|---|---|---|
| Front Driver (Left) | 42392684 | 95943370 |
| Front Passenger (Right) | 42392685 | 95943371 |
Compatibility Check: While these parts are listed for 2013-2020 Trax and 2013 Encore, some vendors show compatibility up to 2022. Always verify fitment with your vehicle's VIN before purchasing.
Frequently Asked Questions (FAQ)
Can I reuse my bumper shock after a small accident?
No. Bumper shocks are single-use, sacrificial parts designed to crush and absorb an impact. Once compressed, they offer no further protection and must be replaced, even if the damage seems minor.
Is the driver's side shock the same as the passenger's side?
No. The left and right side shocks are mirror images of each other and are not interchangeable. You must buy the specific part for the side you are repairing.
If only one shock is damaged, do I need to replace both?
No. You only need to replace the shock that has been damaged in the collision. The undamaged shock on the other side can remain in place.
Will a bad bumper shock cause any warning lights or noises?
No. This is a purely mechanical part and has no electronic sensors. It will not trigger a check engine light or any other warning. It also will not make noise during normal driving; the only symptom of a problem is visible damage after an impact.
Technical Specifications
OEM Part Numbers: 42392684 (Front Left) 95943370 (Front Left, Superseded) 42392685 (Front Right) 95943371 (Front Right, Superseded)
Also known as a Rail End Absorber. Connects the bumper reinforcement beam to the vehicle frame rail.
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.
- Chevrolet Trax:
- Buick Encore:
- Understanding This Part: Bumper Shock vs. Bumper Absorber
- Symptoms of a Damaged Bumper Shock
- Buying a Used Bumper Shock: What to Check
- Known Issues, TSBs, and Recalls
- Replacement Difficulty and Procedure
- General Replacement Steps:
- Cost Comparison
- Technical Specifications & Part Numbers
- Frequently Asked Questions (FAQ)
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