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Introduction of the rear bumper upper section, rear bumper side panels, and rear bumper reinforcement beam in the Exterior system of the V80 2018 by Asiautos Auto Parts(MAXUS Aftermarket Parts Expert)

por Jason Chen en Jun 15, 2025
Introduction of the rear bumper upper section, rear bumper side panels, and rear bumper reinforcement beam in the Exterior system of the V80 2018 by Asiautos Auto Parts(MAXUS Aftermarket Parts Expert)

Edited by Asiautos Auto Part

1. Rear Bumper Upper Section (Rear Bumper Cover)

The upper rear bumper, often referred to as the bumper cover or fascia, is a critical exterior component of the V80 2018’s rear-end design. Constructed from high-impact-resistant thermoplastic polyolefin (TPO) or polypropylene (PP), it balances aesthetics with functionality.

  • Design & Aerodynamics:
    The upper bumper integrates seamlessly with the V80’s boxy yet streamlined silhouette. Its contours reduce drag while accommodating features like reverse parking sensors, reflectors, and optional tow hitch covers. The 2018 refresh introduced sharper creases for a more modern look.

  • Functionality:

    • Impact Absorption: Engineered to deform slightly under low-speed collisions (per ECE R42 safety standards), minimizing damage to underlying structures.

    • Modularity: Designed for easy replacement; color-matched to the vehicle’s paint (options include metallic finishes).

    • Integration: Houses the license plate recess, rear fog lights, and may include blackout trim for sportier variants.

  • Material Science:
    The TPO/PP blend ensures UV resistance, preventing fading, while remaining lightweight (~5–7 kg). Molded-in textures hide minor scratches common in urban use.

2. Rear Bumper Side Panels (Quarter Panels/Side Members)

The rear bumper side panels (or side extensions) bridge the upper bumper and wheel arches, ensuring aerodynamic continuity and protecting the rear fenders.

  • Structural Role:
    These panels are typically ABS plastic or fiberglass-reinforced polymer to withstand debris strikes. In the V80, they’re bolted to the rear frame rails via bracket assemblies, allowing quick disassembly for repairs.

  • Design Features:

    • Flush Fitment: Gaps are minimized (~3–5 mm) to prevent wind noise at highway speeds.

    • Texture & Finish: Some trims feature grained surfaces to mask off-road scratches, while premium versions may have gloss black inserts.

    • Utility: Reinforced sections near the wheel wells guard against tire-kicked stones.

  • Crash Performance:
    Side panels work with the reinforcement beam to redirect impact forces away from the rear longitudinal beams, crucial for Euro NCAP rear-impact tests.

3. Rear Bumper Reinforcement Beam (Impact Bar/Crush Beam)

The reinforcement beam is the hidden backbone of the bumper system, typically a high-strength steel (HSS) or aluminum extrusion (in weight-saving variants).

  • Engineering Specifications:

    • Material: Dual-phase steel (DP600) or boron steel, with a tensile strength of ~800–1000 MPa.

    • Geometry: C-channel or B-shaped profile to optimize crush zones; mounted to the rear frame horns via shear bolts.

    • Corrosion Protection: Electro-galvanized coating or e-coating prevents rust, critical for the V80’s commercial/van applications.

  • Safety Compliance:

    • Meets ECE R42 and FMVSS Part 581 for 4 km/h impacts without structural damage.

    • In high-speed collisions, the beam transfers energy to the rear crumple zones, reducing cabin deformation.

  • Weight vs. Strength:
    The 2018 model’s beam weighs ~8–10 kg (steel) or ~5 kg (aluminum), striking a balance between payload capacity (key for the V80’s cargo variants) and crashworthiness.

Integration & System Synergy

The three components work cohesively:

  1. Low-Speed Impacts: The cover deforms, the beam absorbs energy, and side panels prevent debris ingress.

  2. Pedestrian Safety: Upper bumper’s energy-absorbing foam (if equipped) reduces leg injuries.

  3. Modular Repairs: Bolt-on designs lower insurance costs—only damaged sections need replacement.

Comparative Advancements (2018 Model Year Updates)

  • Material Upgrades: Transition from all-steel beams to hybrid steel-aluminum in select trims.

  • Aerodynamic Tweaks: Revised side panel contours reduce drag by ~2% vs. pre-2018 models.

  • Sensor Integration: Parking sensor housings are now molded into the upper bumper for better waterproofing.

Conclusion

The V80 2018’s rear bumper system exemplifies a pragmatic blend of durability, repairability, and safety compliance. Its modular design caters to both fleet operators (prioritizing cost-efficiency) and private buyers (seeking aesthetics), while the reinforcement beam’s robust engineering ensures compliance with global safety norms. Whether for urban deliveries or passenger transport, this system underscores SAIC Maxus’s focus on functional versatility.

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C00014077-4100 C00109315 C00104462 C00014714 C00014686

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