Set of 4 iridium spark plugs NGK 94833 PLFER7A8EG

Set of 6 NGK 94833 PLFER7A8EG Iridium Spark Plugs for Audi A4 A5 A6 Q5 Q7 Porsche Macan 2.0L

Installing the original factory set of six premium Laser Iridium series spark plugs completely eliminates the problem of hidden power loss and harsh operation of 2.0-liter engines. Turbocharged power units of the EA888 generation are extremely demanding on the stability of the electrical discharge, as the slightest spark formation failure under boost pressure leads to immediate coil failure and catalyst destruction. The set is supplied strictly in a branded design, protected by brand markings, which guarantees an exact match of the heat rating and internal resistance. The general packaging, shown in the technical photo image_c172e2.jpg, bears the factory index "×4", but this extended set is equipped with 6 items, providing the owner with a full stock for scheduled maintenance of a four-cylinder ICE and leaving two original spark plugs in reserve. The use of these components restores the turbo engine's benchmark acceleration dynamics, eliminates micro-vibrations at idle, and optimizes the fuel combustion process in all driving modes.

Technological Potential of Precious Metal Laser Welding

The use of wear-resistant noble alloys in the working area of the spark gap allows the elements to withstand extreme pressure in the combustion chambers without changing geometry. The ultra-thin iridium tip of the central electrode concentrates a high-density electrical charge, significantly reducing the load on the vehicle's onboard network.

The application of the original set drastically increases the reliability of the entire ignition system:

• Unobstructed expansion of the initial combustion front in the cylinder due to the thin profile of the working elements, which increases engine efficiency.

• Complete cessation of the process of burning and electro-erosion of the ground electrode metal due to the platinum overlay.

• Reliable protection of expensive individual coils from thermal breakdown due to the reduction of the required breakdown voltage.

The components maintain a constant inter-electrode distance throughout their service life, completely eliminating the occurrence of dangerous detonation under load.

Heat Dissipation and Insulation Under Peak Loads

The five-rib geometry of the outer surface of the high-density ceramic insulator prevents surface current leakage to the car body in high humidity. The internal copper core, deeply integrated into the central electrode, ensures instant transfer of excess heat to the cylinder head cooling circuit.

Engineering solutions guarantee flawless service of the unit under any temperature conditions:

• Absolute gas tightness of the body and retention of compression due to a special powder sealant at the metal-ceramic junction.

• Suppression of high-frequency radio interference by a built-in monolithic 5 kOhm resistor, which protects ECU units and sensitive sensors from malfunctions.

• Protection against thermal diffusion and thread sticking to the aluminum block due to a three-component galvanic coating.

The working area of the spark plug reaches the regulatory self-cleaning temperature in seconds, effectively burning off soot deposits during prolonged city traffic jams.

Detailed Applicability Table by Models and Years of Manufacture

Replacement of the spark formation system elements should be carried out only on a completely cooled engine with mandatory torque control using a torque wrench.

Product Specifications

• Brand: NGK

• Brand Registration Country: Japan

• Country of Manufacture: Japan

• Material: iridium, platinum, metal, ceramic

• Size: thread diameter 12 mm, thread length 26.5 mm, hex size 14 mm

• Color: white, silver

• Weight: 258 g

• Condition: new

• Volume: set of 6 pcs

• Product Group: automotive parts, ignition system, spark plugs

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

• Compatibility: 2.0L gasoline engines of Audi A4, A5, A6, Q5, Q7, Porsche Macan cars from 2016–2022

• Features: laser welding of electrodes, iridium central electrode, platinum insert on the side electrode, built-in noise suppressor resistor, copper core

• Factory Part Number (MPN): PLFER7A8EG

• Factory Stock Number: 94833

• UPC: 087295848333

• Heat Rating: 7

• Thread Pitch: 1.25 mm

• Seating Type: flat with sealing washer

• Terminal Design: fixed rigid lead

• Package Contents: 6 spark plugs in individual cardboard boxes, general transportation packaging