Part description

This rear window lowering mechanism is intended for the right rear door (behind the passenger) on the Peugeot 308 T9 model. It is used to smoothly guide and move the glass when the window is pulled in and out. A suitable solution for problems such as window jamming, uneven operation or non-functional downloads.

The part is also searchable by product number, so we list the available codes in the description for easy pairing with your original part.

Technical information

• Manufacturer: PSA Citroën Peugeot
• Model: Peugeot 308 T9
• Other numbers: 9826080380

Product codes

• Product codes: 9800273380, 9826080380

Installation recommendations

• Verify location (right rear door behind passenger) and part codes match original mechanism before assembly.
• It is recommended to check the condition of the guide rails, glass attachment and connectors in the door so that the new mechanism works without unnecessary strain.
• After installation, perform a test run of the window and check that the glass runs straight and without rubbing.

Reasons why the part is damaged

• Wear of the mechanism and guide parts due to long-term use.
• Increased movement resistance of the window (dirty or damaged wiring, rubbing glass).
• Moisture entering the door and subsequent corrosion or stiffening of moving parts.
• Mechanical damage after hitting the door or unprofessional intervention when disassembling the door panel.

Part description

This driver’s window pull-down mechanism is intended for the left front door (driver’s side) of the Peugeot 308 T9. It is used to smoothly guide and move the glass when the window is pulled in and out. A suitable solution for problems such as the window stuttering, uneven operation or a situation where the window moves down crookedly.

The part is mainly searched by product number, so we recommend comparing the markings on the original mechanism before ordering.

Technical information

• Manufacturer: PSA Citroën Peugeot
• Model: Peugeot 308 T9
• Other numbers: 9826079580

Product codes

• Product codes: 9816273280

Installation recommendations

• Before fitting, check that it is a left front door (driver) and that the part codes match.
• When disassembling the door panel, proceed carefully so as not to damage the handles and seals.
• It is recommended to check the condition of the guide rails, the glass attachment and, if necessary, lubricate the friction points according to common practice.
• After installation, perform a full run test of the window and verify that the glass runs straight and without stuttering.

Reasons why the part is damaged

• Wear of mechanical parts due to long-term use (backlash, stuttering).
• Damage to the guiding elements or incorrect glass guidance, which puts excessive strain on the mechanism.
• Intrusion of dirt and moisture into the door – increased friction, corrosion and subsequent sticking.
• Force control when the window is frozen or when the glass is blocked.
• Improper assembly/disassembly (bending of the line, bad seating of the glass, damage to the attachment).

Overview

This window regulator mechanism is designed for the left rear door of the Peugeot 308 (T9). It restores reliable, smooth up-and-down movement of the rear driver‑side window and is suitable for professional workshops and experienced DIY mechanics who perform body‑electrical repairs.

Key Features

• Replacement mechanism for the left rear window of Peugeot 308 T9.
• Compatible with product codes commonly referenced in parts lists and repair orders.
• Designed to meet the fitment and mounting points of the original assembly for straightforward installation.
• Ideal for replacing worn regulators that cause slow movement, noise, or window drop.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Peugeot 308 (T9)
• Product Codes: 9800273480, 9826080480
• Other Numbers: N/A

Installation Recommendations

• Safety First: Disconnect the negative battery terminal before beginning to avoid accidental motor operation and electrical short circuits.
• Access: Remove the interior door trim and peel back the moisture barrier to access the regulator and motor assembly.
• Support Glass: Secure the glass in the fully up position with tape or a support to prevent it from falling when the regulator is unbolted.
• Disconnect Wiring: Unplug the window motor electrical connector before removing the regulator fasteners.
• Removal/Installation: Remove the mounting bolts that secure the regulator to the door shell, extract the assembly, and fit the new regulator reversing the removal steps.
• Test Before Reassembly: Reconnect the battery and test window travel, alignment, and switch operation before reinstalling the moisture barrier and trim.
• Recommended Tools: Trim removal tools, Torx/Sockets set, ratchet, flat screwdriver, support strap or tape, and gloves. Use a multimeter to verify power if motor does not respond.
• Professional Tip: Clean and lightly lubricate guide channels and check glass clamps for wear. Ensure connectors and wiring are dry and corrosion‑free before final assembly.

Why This Part Commonly Fails

• Wear of Motor Brushes or Bearings: Motors in frequently used windows degrade over time and can lose torque or seize.
• Cable Fraying or Breakage: Cable‑driven regulators can suffer from frayed or broken cables, leading to slipping or no movement.
• Worn Plastic Sliders and Guides: Plastic sliders wear or break, causing binding, rattles, or misalignment.
• Water Ingress and Corrosion: Moisture penetrating the door can corrode tracks, fasteners, and electrical connectors.
• Mechanical Damage: Impacts to the door or excessive force (e.g., obstructed glass) can bend tracks or damage the mechanism.
• Typical Lifespan: Longevity depends on usage and environment; failures are more common on higher‑use vehicles or in corrosive climates.

Compatibility And Ordering

This item is most frequently searched by its product numbers 9800273480 and 9826080480. Confirm the part number against your repair documentation or parts list to ensure correct fitment for the left rear (driver‑side) door of Peugeot 308 T9 models.

Additional Notes For Mechanics

When replacing the regulator, check the condition of the door wiring harness, switches, and fuses as part of a complete diagnosis. Replacing the regulator and addressing a weak motor or corroded connector at the same time reduces repeat visits and improves long‑term reliability.