The cost of replacing a car air conditioning filter typically ranges from 30 to 600 Malaysian Ringgit, depending on the car model, filter material, and replacement channel. For economy cars like the Toyota Corolla, which use ordinary non-woven fabric filters, the purchase price at auto parts markets is about 20 to 50 Ringgit, and replacing it yourself can save labor costs; if you choose to have it replaced at a 4S shop, the total cost including labor is about 60 to 150 Ringgit. For mid-sized cars like the Camry, the price of third-party brand activated carbon filters is 50 to 100 Ringgit, while original equipment manufacturer (OEM) parts cost 50 to 150 Ringgit. For luxury brands such as BMW or Mercedes-Benz, the price of OEM filters is higher, around 300 to 400 Ringgit, and the total cost including 4S shop labor fees may reach 500 to 600 Ringgit. For urban driving, replace it every 10,000 to 20,000 kilometres or every six months; in dusty environments, the replacement cycle needs to be shortened. Well-known brands such as Mann Filter and Bosch's HEPA filters, although more expensive (80 to 200 Ringgit), can filter PM2.5 and improve the air quality inside the car.