2004-2008 Chrysler Pacifica Bumper Impact Bar: Damage, Rust, and Replacement Facts
Your complete guide to inspecting, replacing, and choosing the right front or rear bumper reinforcement for your first-generation Pacifica.
- This part is a critical one-time-use safety component; never reinstall a bent, cracked, or damaged bar.
- The front bar is aluminum (OEM P/N 5113264AC) and the rear is steel (OEM P/N 4857732AB); they are not interchangeable.
- When buying used, meticulously inspect for any bends, cracks, or serious corrosion. A damaged used part is worthless.
- These parts fit the 2004-2008 Pacifica crossover ONLY, not the 2017+ Pacifica minivan.
Distinguishing Front vs. Rear Bumper Bars
For the 2004-2008 Chrysler Pacifica, it's important to know that the front and rear bumper impact bars are different parts made from different materials. The front impact bar is made of aluminum to save weight, while the rear impact bar is typically made of steel for strength. They are not interchangeable and have unique part numbers.
Compatibility Warning: These parts are only for the first-generation Chrysler Pacifica crossover built from 2004 to 2008. They will NOT fit the Chrysler Pacifica minivan produced from 2017 onwards.
Symptoms of a Damaged Bumper Impact Bar
Unlike electronic or mechanical parts, a bumper impact bar doesn't 'fail' with codes or running issues. Failure is almost always the result of physical damage from a collision or weakening from corrosion.
- Visible Damage After Impact: This is the most obvious symptom. After even a minor collision, the plastic bumper cover may pop back into shape, hiding a bent, cracked, or crushed impact bar underneath. Any visible deformation on the metal bar means it has done its job and must be replaced.
- Loose or Misaligned Bumper Cover: The plastic bumper cover mounts to the impact bar and surrounding structures. If the impact bar is broken or its mounting points are bent, the bumper cover may appear loose, sag, or have uneven gaps with the body panels.
- Visible Corrosion: On the steel rear bar, look for significant rust, especially in areas where road salt is used. On the aluminum front bar, corrosion appears as bubbling or peeling paint with a white, powdery substance underneath. While surface rust might be cosmetic, deep, flaky rust or aluminum corrosion compromises the bar's structural strength.
Buying a Used Bumper Impact Bar: What to Check
A used OEM impact bar is an excellent alternative to a new part, provided it is in perfect structural condition. A damaged bar, even slightly, cannot provide the same level of protection in a future collision.
Inspection Checklist:
- Check for Bends and Cracks: Lay the bar on a flat surface to check for any warping. Carefully inspect the entire surface, especially around mounting holes, for any signs of bending, kinking, or stress cracks. A compromised bar is scrap metal.
- Inspect Mounting Points: All mounting brackets and bolt holes must be perfectly straight and undamaged. A bent mounting point will make it impossible to align the bumper cover correctly.
- Assess Corrosion Level:
- For Rear (Steel) Bars: Minor surface rust can often be sanded and painted. However, avoid any bar with heavy, flaking rust or deep pits, as this indicates a loss of structural thickness.
- For Front (Aluminum) Bars: Inspect for any paint bubbling or chalky white oxidation. This is a form of corrosion that can weaken the aluminum over time. This is a known issue on many Chrysler aluminum body panels.
- Avoid Repaired Bars: Never purchase an impact bar that shows signs of being heated, bent back into shape, or welded. These repairs destroy the engineered crush properties of the metal, rendering it unsafe.
Pro Tip: The best used impact bars come from vehicles that were taken off the road due to non-collision issues, like engine or transmission failure, or were hit in a different area (e.g., a rear bar from a vehicle with front-end damage).
Cost of Replacement (2026 Estimate)
Prices can vary based on location and part condition. The front aluminum bar is generally more expensive than the rear steel bar.
| Part/Service | Estimated Cost | Notes |
|---|---|---|
| New OEM | $370 - $550 | Purchased from a Chrysler/Mopar dealership. |
| New Aftermarket | $70 - $200 | Quality and fit can vary. Ensure it is certified to meet safety standards if possible. |
| Used OEM | $100 - $250 | A cost-effective option if the part is inspected carefully and found to be in perfect condition. |
| Shop Labor | $200 - $400 | Includes removing the bumper cover, swapping the impact bar, and reinstalling the cover. Labor is typically 1.5-2.5 hours. |
Installation Overview
Replacing the bumper impact bar is a straightforward job for a DIYer with basic tools. The main task is the careful removal of the plastic bumper cover.
- Difficulty: 3 out of 5
- Estimated Time: 1.5 - 2.5 hours
- Tools Needed: Ratchet and sockets (typically 10mm), trim panel removal tool, Phillips screwdriver.
Basic Steps:
- Open the hood or liftgate. Remove the plastic push clips and any screws holding the top edge of the bumper cover.
- Inside each rear wheel well, remove the screws or clips securing the bumper cover to the fender liner and body.
- Underneath the vehicle, remove any remaining clips or fasteners holding the bottom of the cover.
- Carefully unsnap the sides of the bumper cover from the retaining brackets below the tail lights or headlights. It's best to pull outwards gently.
- With the cover loose, disconnect any wiring for license plate lights or parking sensors if equipped. Set the cover aside on a soft surface to avoid scratches.
- The impact bar is now exposed. Unbolt it from the vehicle's frame rails.
- Bolt the replacement bar in place, ensuring it is properly seated.
- Reinstall the bumper cover in the reverse order of removal.
Known Recalls and Service Bulletins
As of mid-2026, there are no specific NHTSA safety recalls for the front or rear bumper impact bars on the 2004-2008 Chrysler Pacifica. While Chrysler has issued technical service bulletins (TSBs) for aluminum panel corrosion on newer vehicles, none specifically target the first-generation Pacifica's front impact bar. However, the principles of inspecting for aluminum corrosion remain relevant for any used part.
Part Numbers & Technical Specifications
These are the primary part numbers for the main impact bars. Always verify fitment with the seller using your vehicle's VIN.
| Part | Material | OEM Part Numbers | Aftermarket (Partslink) |
|---|---|---|---|
| Front Bumper Impact Bar | Aluminum | 5113264AC, 4857840AF, 5113264AB | CH1006203 |
| Rear Bumper Impact Bar | Steel | 4857732AB, 04857732AB | CH1106199 (Note: This is often misidentified and may refer to the bumper cover, verify with seller) |
Frequently Asked Questions (FAQ)
Can I repair a bent or cracked bumper impact bar?
No. An impact bar is a one-time-use safety device. Once it has been bent, cracked, or compromised, it cannot be safely repaired. Heating and bending the metal back into shape destroys its structural integrity and ability to absorb a future impact correctly. It must be replaced.
Is a rusty impact bar dangerous?
It depends on the severity. Light surface rust is cosmetic, but heavy rust that is flaking off in layers has reduced the thickness and strength of the metal. A significantly rusted bar will not perform as designed in a collision and should be replaced.
What is the difference between the bumper cover and the impact bar?
The bumper cover is the painted plastic panel you see on the outside of the car. Its main purpose is aerodynamics and aesthetics. The impact bar is the metal beam hidden behind the cover, which provides the actual crash protection.
Do I also need to replace the foam absorber piece?
Often, yes. There is usually a large piece of styrofoam or energy-absorbing foam between the bumper cover and the impact bar. If it is cracked, compressed, or damaged in any way, it should be replaced to ensure proper low-speed impact absorption.
Helpful Videos
Technical Specifications
OEM Part Numbers: 5113264AC (Front) 4857840AF (Front, superseded) 5113264AB (Front, superseded) 4857732AB (Rear) 04857732AB (Rear)
Front Material: Aluminum. Rear Material: Steel.
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.
- Chrysler Pacifica:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Distinguishing Front vs. Rear Bumper Bars
- Symptoms of a Damaged Bumper Impact Bar
- Buying a Used Bumper Impact Bar: What to Check
- Inspection Checklist:
- Cost of Replacement (2026 Estimate)
- Installation Overview
- Basic Steps:
- Known Recalls and Service Bulletins
- Part Numbers & Technical Specifications
- Frequently Asked Questions (FAQ)
- 🎟️ Get 5% Off