The cost of replacing spark plugs is mainly determined by the material, vehicle model, and labor cost. Nickel alloy spark plugs cost approximately 15-50 Malaysian Ringgit per unit, and the total cost for replacing a set for a four-cylinder car is about 200-300 Malaysian Ringgit (including labor costs of 40-80 Malaysian Ringgit). They are suitable for ordinary vehicle models with a replacement interval of 20,000-30,000 kilometres. Platinum or iridium spark plugs cost 50-100 Malaysian Ringgit per unit; for example, the NGK spark plug used in the Passat is 126 Malaysian Ringgit per unit, and four units plus labor cost about 504 Malaysian Ringgit, with a lifespan of 50,000-100,000 kilometres, making them more suitable for turbocharged or high-end vehicle models. Luxury cars such as the BMW 5 Series use double-iridium spark plugs, which may cost over 250 Malaysian Ringgit per unit, and the total replacement cost at 4S dealerships may exceed 1,000 Malaysian Ringgit. If you purchase genuine spark plugs (such as Bosch or NGK brands) yourself and have them installed at a repair shop, you can save about 30% of the labor cost, but you need to ensure the engine is cooled and the operation is performed correctly.
