The 2000 Audi S4 is a high-performance compact luxury sedan (also offered as the S4 Avant wagon in many markets) built on the B5-generation A4 platform. Positioned as a stealthy sports sedan, it blends upscale materials, all-weather traction, and strong turbocharged power in a practical daily-driver package. It’s ideal for drivers who want quattro confidence and tuning potential without moving up to a larger executive sedan. For many enthusiasts, the 2000 model represents the sweet spot of the early B5 S4 era: quick, refined, and highly modifiable, but dependent on diligent maintenance.

- 2.7L twin-turbo V6 (engine code APB) rated around 250 hp and 258 lb-ft of torque, delivering strong midrange pull and easy aftermarket upgrade potential. - quattro all-wheel drive with a Torsen center differential for confident traction in rain and snow, a key reason many buyers cross-shop it against rear-wheel-drive sport sedans. - Available 6-speed manual (most sought after) or 5-speed automatic, with the manual generally preferred for engagement and long-term durability. - Sport-tuned suspension and stronger brakes versus the standard A4, giving the S4 sharper handling while keeping a comfortable highway ride. - Premium interior with supportive sport seats, upscale trim, and a solid, understated design that helped define Audi’s early-2000s performance identity.

Searches like “2000 Audi S4 problems,” “2000 Audi S4 reliability,” and “2000 Audi S4 common issues” often focus on the same handful of expensive-but-manageable trouble spots. Overall reliability can be good for a 2000 S4 that has thorough service records, but deferred maintenance tends to snowball quickly. - Turbocharger wear or failure: The factory K03 turbos can wear over time, especially on chipped/tuned cars or those with poor oil-change habits. Symptoms include smoking, boost loss, or limp mode. Failures commonly show up anywhere from 80,000 to 140,000 miles, though some last longer with careful maintenance. - Timing belt and water pump service: The 2.7T is timing-belt driven, and overdue belt service is a major risk. Water pumps and idlers are typically done at the same time; neglect can lead to overheating or catastrophic engine damage. Many owners treat 60,000–80,000 miles as a prudent interval depending on prior parts used and driving conditions. - Ignition and vacuum/boost leaks: Coil packs/ignition modules, aging vacuum lines, diverter valves, and intercooler hoses can cause rough running, misfires, or underboost. These issues can appear gradually with age and often become noticeable around 60,000–120,000 miles. - Cooling and oil leaks: Common leak points include valve cover gaskets, cam seals, and various coolant hoses/plastic fittings. A small seep can turn into a bigger job if ignored, and coolant leaks can be difficult to trace due to the engine bay’s tight packaging.