In the UAE, for most Audi petrol models using Special 95 or Super 98 fuel, spark plugs should be changed every 30,000 to 40,000 km, not the 60,000 km often cited for milder climates. The extreme heat, constant use of air conditioning, and dusty conditions common on roads like Sheikh Zayed Road or during desert driving accelerate wear. For instance, a 2022 Audi Q5 2.0 TFSI driven mainly in Dubai traffic may show symptoms of wear—like rough idling or a slight drop in fuel economy from 11.5 km/l to 10.8 km/l—closer to the 35,000 km mark. RTA Dubai's vehicle inspection data frequently flags ignition issues in high-mileage cars, while reports from the UAE Ministry of Energy and Infrastructure highlight how engine efficiency degrades faster in high ambient temperatures. Using long-life iridium plugs (common in GCC-spec Audi A4, A6) can stretch the interval toward 60,000 km for sedans with mostly highway use, but for SUVs like the Q7 or performance models like the RS5 subjected to stop-start traffic, sticking to 40,000 km is prudent. The total cost for a plug change at an independent garage ranges from 600 to 1,200 AED depending on the model; delaying it risks damaging the ignition coils, leading to a repair bill exceeding 2,000 AED. Calculating cost per km, timely replacement adds about 0.02 AED/km but protects against a potential 0.10 AED/km increase in fuel costs and more significant depreciation.
