Set of 4 iridium spark plugs NGK 94833 PLFER7A8EG

Set of 4 pcs NGK 94833 PLFER7A8EG Iridium Spark Plugs

A ready-made professional set of four car spark plugs is designed for a full simultaneous replacement of ignition system elements in four-cylinder gasoline engines. The use of iridium alloy on the central electrode and platinum plating on the ground side electrode ensures uninterrupted operation of the power unit under increased temperature and mechanical loads. High-quality spark formation contributes to the instant ignition of the fuel-air mixture, which directly affects the smoothness of the car's ride, acceleration dynamics, and overall engine responsiveness. The presence of a complete set of parts from one factory batch guarantees identical physical parameters and the same electrical resistance in each cylinder, minimizing imbalance in the engine operation.

Technological Features and Protection of Onboard Electronics

The use of precious metals in the design allows for a significant reduction in the diameter of the central electrode, facilitating the generation of a powerful spark discharge even at reduced onboard network voltage or in severe frost. A copper core integrated inside the side electrode contributes to the accelerated removal of excess heat from the combustion chamber, preventing thermal destruction of parts and dangerous pre-ignition. A special metal coating on the outer casing protects the steel thread from aggressive environmental influences and eliminates the risk of cylinder head damage during subsequent disassembly.

Built-in engineering solutions ensure the stability of the system's technical parameters throughout the entire service interval:

• The internal ceramic resistor effectively suppresses electromagnetic pulses, protecting sensitive sensors and electronic control units.

• The fixed inter-electrode gap is calibrated on the conveyor and does not require additional adjustment before direct installation.

• The external ceramic insulator with special ribs prevents dangerous surface spark breakdown along the body.

Complete sealing at the junction of the metal and ceramic parts prevents leakage of working gases from the cylinder and maintains the engine's nominal compression.

Engineering Compatibility with Automotive Platforms

The presented component set is designed in accordance with strict technical standards of modern high-performance gasoline power units with turbocharging and direct fuel injection. The parts completely replace the factory elements installed during the initial assembly of vehicles on the conveyor.

The use of original cross-reference numbers guarantees an exact match of thread pitch and geometric proportions necessary for the proper operation of the combustion chamber of the specified vehicles.

Product Specifications

• Brand: NGK

• Brand Registration Country: Japan

• Material: iridium, platinum, steel, ceramic, copper

• Size: thread diameter 14 mm, thread length 26.5 mm, thread pitch 1.25 mm, hex size 16 mm

• Color: white, silver

• Weight: 188 g

• Condition: new

• Product Group: auto parts, ignition system

• Purpose: ignition of the fuel-air mixture in the cylinders of gasoline internal combustion engines

• Compatibility: original replacement for Volkswagen, Audi, Skoda, Seat cars with OEM numbers 06K 905 601 B, 06K905601B

• Features: laser welding of electrodes, iridium central electrode, platinum plating on the ground electrode, noise suppressor resistor 5 kOhm

• Heat Range: 7

• Seat Type: flat with sealing washer

• Package Contents: 4 spark plugs in individual protective tubes and branded cardboard boxes, combined into one complete set box