21103767 main mirror – Description

21103767 main mirror is a complete exterior mirror assembly designed to restore stable rear visibility and consistent adjustment on vehicles compatible with VOLVO heavy truck platforms. Fitment should be confirmed by OE reference and mounting configuration before ordering. OE references used for identification include 21103767, 3980935, 3980927, 3980933, and 3980932.

In daily operations, the 21103767 main mirror helps drivers maintain a steady view during lane changes, roundabouts, docking, and yard maneuvers. When a mirror assembly is cracked, loosened, or misaligned, symptoms often include vibration blur at speed, drifting mirror position after adjustment, or water and road grime collecting around damaged edges. Replacing the complete unit helps return the mirror to a stable reference position and improves routine safety checks.

For workshop planning, the 21103767 main mirror is typically selected by matching the arm interface, housing profile, and any connector layout used on the truck’s configuration. Depending on cab spec, mirror assemblies may include heating or electric adjustment functions; confirm your connector type and feature set before ordering. Keeping OE references visible in inventory systems supports faster picking and reduces mismatch risk across mixed fleets.

Common applications for the 21103767 main mirror include trucks compatible with VOLVO FH12 (1993), VOLVO FM10 (1998), VOLVO FM12 (1998), and VOLVO NH (1999), verified by OE reference and mounting layout. Packing weight: 6.42 kg. Quantity in box: 1.

Bulk Purchase Benefits

Box quantity: 1 unit (supports accurate receiving, shelf counting, and reduced handling damage for a 6.42 kg assembly).

OE-based SKU control improves picking accuracy: 21103767 / 3980935.

Suitable for depot service kits and scheduled mirror replacement programs across compatible cab variants.

DIY Replacement Guide

■ Common reasons to replace

■ Cracked housing or damaged mirror surface reducing visibility

■ Vibration blur at speed or mirror position drifting after adjustment

■ Loose mounting interface or damaged fastener points

Service steps for the 21103767 main mirror

● Support the assembly before loosening fasteners to avoid door damage and dropping.

▲ Disconnect any connector(s) carefully (if present on your configuration) and inspect pins for corrosion.

■ Install the replacement, tighten evenly, then verify stable adjustment range and road-test for vibration blur.

OE reference check: 21103767, 3980935, 3980927, 3980933, 3980932.

Compliance Statement

This replacement 21103767 main mirror is intended for commercial vehicle service and maintenance use, with focus on consistent mounting geometry and stable positioning under fleet operating conditions.

Fitment should be confirmed by OE reference and mounting configuration before ordering.

OE Reference & Mounting Verification

Compatible with VOLVO FH12, VOLVO FM10, VOLVO FM12, VOLVO NH.