The 2025 Audi S4 is a compact luxury sport sedan that blends everyday comfort with serious performance, aimed at drivers who want a quick, all-weather daily driver without stepping up to a full-on track-focused model. It sits above the Audi A4 in the lineup, adding a stronger powertrain, sport-tuned hardware, and more aggressive styling while still keeping a refined cabin. The S4 remains part of the B9-generation family and continues the formula of a turbocharged V6 paired with Audi’s signature quattro all-wheel drive. In the segment, it competes with performance versions of compact luxury sedans by prioritizing traction, interior quality, and usable power.

1) Turbocharged 3.0-liter V6 performance: The 2025 Audi S4 continues with a 3.0L turbo V6 that delivers strong acceleration and midrange torque, making it feel quick in real-world passing and merging. 2) quattro all-wheel drive: Standard quattro AWD is a core selling point, improving grip in rain and snow and helping put power down cleanly on corner exit. 3) 8-speed automatic transmission: The S4’s automatic transmission is tuned for both smooth commuting and crisp downshifts in Dynamic mode. 4) Sport chassis and braking upgrades: Compared with the A4, the S4 includes sportier suspension tuning and stronger braking hardware designed for repeated high-speed driving. 5) Tech-forward cabin: Expect Audi’s modern infotainment layout, a premium feel with supportive sport seats, and the driver-assistance and connectivity features shoppers typically seek in this class.

Shoppers searching “2025 Audi S4 reliability,” “2025 Audi S4 problems,” or “2025 Audi S4 common issues” usually want a realistic view: the S4 can be dependable when maintained correctly, but it’s a high-output turbo luxury sedan, so upkeep and a few recurring trouble spots matter. 1) Cooling system leaks and thermostat/water pump concerns: Some Audi turbo V6 models have a history of coolant leaks from plastic housings, seals, or water pump/thermostat components. Owners often notice low coolant warnings, sweet coolant smell, or crusty residue near the front of the engine. When it happens, it commonly shows up anywhere from 30,000 to 70,000 miles depending on climate and driving style. 2) Carbon buildup on intake valves (direct injection): With direct injection, intake valves don’t get “washed” by fuel, so deposits can accumulate over time. Symptoms can include rough cold starts, hesitation, or reduced fuel economy, often becoming noticeable around 40,000–80,000 miles. 3) PCV/breather system and oil consumption complaints: A worn or malfunctioning PCV system can contribute to oil seepage, higher oil usage, or idle quality issues. Some owners report needing to top off oil between services, especially with frequent short trips or aggressive driving. 4) Electronic/infotainment glitches: Like many modern luxury cars, occasional issues can involve sensor warnings, camera or parking aid oddities, or infotainment bugs that may be addressed via software updates. These problems are often intermittent rather than catastrophic, but they can be frustrating.