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In the engine valve train mechanism, due to inadequate design, valve springs may fracture due to excessive loads exceeding design specifications and micro-inclusions in the spring material caused by typical manufacturing variations. …

The selector assembly connector in the mechanical automatic transmission (AGS) is improperly positioned, allowing condensed water droplets to drip onto the connector and cause short circuits between terminals. This may trigger warning …

The wire harness routing design connecting to the controller for the mechanical automatic transmission (AGS) on four-wheel-drive vehicles is inadequate, causing the wire harness to contact ribs on the transfer case. Consequently, …

Improper assembly instructions for the clutch cable anchor on the mechanical automatic transmission (AGS) cause misalignment between the anchor and release fork slot, concentrating stress on the clutch cable clamp section. Repeated …

The select piston, a component for gear shifting in the mechanical automated transmission (AGS), has inadequate structural design resulting in insufficient durability in certain units. Repeated gear shifting can cause select piston …

The anti-rotation pin, a component that detects gear position in the mechanical automatic transmission (AGS), is made of inappropriate material, resulting in insufficient durability in some units. Repeated shifting may cause the …

Certain mechanical automatic transmission (AGS) transmission front cases have improper geometry, and clutch release bearings lack sufficient water resistance durability. When water enters the front case, grease inside the bearing is exposed …

In the cooling system of large all-wheel-drive vehicles, improper fastening of the stud bolts attached to the fan hub that connects with the radiator cooling fan causes cracks to develop in the …

In heavy-duty trucks equipped with compressed natural gas (CNG) engines, the main shutoff valve installed in the fuel line is made of inappropriate material. When moisture containing chlorine, such as de-icing agents, …

The hose connecting the radiator and reservoir tank, and the breather hose of the reservoir tank have improper material composition, resulting in insufficient durability. Consequently, these hoses may degrade prematurely and crack. …

In the driver and front passenger seats, the body control module program controlling the seat heater is improper. When the engine is started via remote key, the linked seat heater may not …

In large tractor leaf-air combined suspension systems, the leaf stopper material is inappropriate, causing insufficient load absorption when the leaf contacts the stopper during obstacle clearance and similar events. This allows excessive …

In the starter motor of agricultural tractors, the terminal (ST terminal) of the power supply wiring has insufficient strength compared to the design specification, causing cracks to develop in the terminal area …

In the starter motor of agricultural tractors, due to improper mounting structure, repeated engine starting can create gaps between the engine rear plate and clutch housing. As a result, the starter motor …

In the engine starting device, the ground cable installed between the engine and body has improper length, and may break due to vehicle vibration during driving. As a result, the ground circuit …

The seal structure at the fuel pump mounting location is inadequate, which may cause the O-ring to twist during fuel pump assembly. This can compromise sealing performance due to internal pressure fluctuations …

The battery positive cable connecting the power distribution box and battery, which supplies electrical power to vehicle electrical components, has improper plating and structure at the connector interface. Corrosion caused by vehicle …

The battery positive cable connecting the power distribution box and battery, which supplies power to vehicle electrical components, has inappropriate plating and structure on its connector. This causes increased contact resistance due …

In vehicles equipped with over-fenders, insufficient regulatory compliance verification at the design stage may result in the side marker light installation position not satisfying the requirements specified in Safety Standard Article 34.

The multi-purpose camera in the lane departure prevention support system (Active Lane Keeping Assist) has improper dynamic tire radius settings for vehicle speed calculation, resulting in inaccurate speed computation. Consequently, when the …

In hybrid vehicle electrical wiring, improper work instructions during component assembly have caused electrical wiring to interfere with the vehicle frame. Vibration during operation may abrade the insulation, causing short circuits to …

In semi-trailers equipped with automatic axle lift/lower devices, improper instructions from the design department to the manufacturing department resulted in the absence of a pressure-reducing valve for supplying air pressure to the …

In the running gear of semi-trailers, improper welding between the axle bracket and axle shaft may result in crack initiation at the weld due to vibration during operation. If welding separates and …

In semi-trailer running gear, improper manufacturing procedures have resulted in insufficient grease fill in some wheel bearings. Inadequate lubrication causes wheel bearing discoloration, and continued operation in this condition may lead to …

The air intake inlet lacks protective mesh or similar equipment. During operation, if items such as cigarettes are discarded from the driver's seat, they may be drawn into the air intake located …

The bearing cage used in the wheel-side joint of the right front half shaft may have insufficient hardness due to improper heat treatment in the manufacturing process. This can cause the bearing …

The control program of the control unit governing the electric power steering is inadequate, causing the electric power steering function to stop when high load is applied to the electric motor during …

At the vehicle manufacturing plant's final inspection, the pass/fail determination in the final inspection process may have been unclear, resulting in inspections required under Road Transport Vehicle Safety Standards not being conducted …

① Front wheel rear arm ball joint nuts and steering rack ball joint nuts have insufficient tightening torque due to improper fastening work. Consequently, these nuts may loosen due to driving vibration, …

Fastening bolts for suspension (front and rear), brake calipers (front and rear), front subframe, rear crossmember, and underbody deflector are insufficiently tightened due to improper torque wrench settings. Vibration during operation may …