Dongfeng KR truck parts Left Door Lock Body Assembly 6105920-C5100

At the core of the assembly is a high-precision mechanical lock mechanism that delivers consistent, secure locking for the left door. The lock body features a double-latch design (primary and secondary latches) that engages with the door striker plate to prevent accidental opening—even if the primary latch wears over time. The lock tongue is made of hardened steel (HRC 45–50) that withstands 5,000N of pulling force without bending, ensuring resistance to forced entry. The internal gear system uses brass gears (self-lubricating) that enable smooth lock/unlock operation with minimal effort, requiring only 30N of force to actuate via the door handle (half the force needed for low-quality locks). Unlike flimsy lock bodies that fail after 10,000 cycles, this design endures 100,000+ lock/unlock cycles (equivalent to 8 years of daily use) with no loss of performance

Built to withstand the constant vibration of truck doors and harsh environmental conditions, the assembly uses premium materials for long-term reliability. The outer housing is made of impact-resistant PA66 plastic (UL94 V-0 flame-retardant rating) that tolerates temperature extremes from -40°C (cold cabs) to 90°C (sun-heated doors) without cracking or warping. The internal linkage components (rods, springs) are crafted from 304 stainless steel that resists rust and corrosion, even in high-humidity environments. A rubber damping pad is integrated between the lock body and door panel, reducing vibration transfer by 60%—preventing rattling noise during driving and minimizing wear on internal components. Unlike plastic-only lock bodies that break under minor impact, this rugged design ensures the lock remains functional even after accidental door slams or minor collisions

Engineered to enhance vehicle security and protect against weather damage, the assembly integrates specialized safety mechanisms. It includes an anti-theft deadbolt that engages automatically when the door is locked from the outside, preventing the lock from being forced open with tools. The lock body’s seams are sealed with EPDM rubber gaskets that meet IP65 ingress protection standards, blocking water, dust, and road salt from entering the internal mechanism—preventing rust and freezing in winter. A drain hole at the bottom of the housing redirects any trapped moisture outward, further protecting internal components. Unlike non-sealed lock bodies that freeze shut in cold weather or rust internally, this design ensures reliable operation in rain, snow, or coastal environments

Designed for hassle-free replacement by fleet technicians or DIY owners, the assembly simplifies installation and upkeep. It includes all necessary hardware: 4 M5×12mm self-tapping screws, 2 linkage rod clips, and a tube of anti-seize compound for mounting points. Installation takes 25–30 minutes: remove the door inner panel, disconnect the old lock’s linkage rods and wiring (for central locking models), unbolt the old lock body, align the new assembly with the door’s mounting holes, secure the screws (torque to 8 N·m), and reconnect the linkages/wiring. The lock body is fully compatible with the Dongfeng KR’s original door handles (interior/exterior) and central locking system—no adapter parts required. Each unit undergoes lock force testing, weatherproof verification, and cycle testing, backed by a 24-month warranty against defects (e.g., deadbolt failure, housing cracking, linkage wear)