2020 — 2023
3.0L TDI V6 Turbo - Quattro (TDI Variant)
Diesel
During low-speed maneuvering, listen for any light clunking or clicking from the front suspension, as the multi-link setup on these models can occasionally show signs of bush wear as they age.
Monitor the transmission shift quality; check this by switching between Comfort and Dynamic modes at low speeds to ensure the Tiptronic gearbox remains smooth and doesn't exhibit hesitation.
Observe the digital cockpit display while accelerating moderately; check this by looking for any flickering or software lag, as these units can occasionally require a firmware update.
Inspect the underside or wheel arches; check this by ensuring there is no sign of weeping from the active engine mounts, which provide the refined ride quality this V6 TDI is known for.
Consider a proactive transmission fluid and filter service to ensure the ZF 8-speed continues to provide seamless shifts.
It is a sensible time to inspect the condition of the drive belts and tensioners to prevent unexpected cooling system issues.
Check the condition of the suspension dampers and control arm bushings to maintain the factory ride quality.
Ensure the oil changes have been strictly adhered to every 15,000km or 12 months using the correct VW 507.00 spec oil.
Verify that the brake fluid has been flushed every two years to maintain pedal feel and safety.
Confirm the air conditioning system has been serviced, as clean cabin filters and refrigerant levels keep the climate control efficient.
Check that the Quattro all-wheel-drive system has received a differential oil inspection to keep the driveline quiet.
Make sure the AdBlue tank levels have been monitored, as the SCR system is vital for the TDI's emissions performance.
Estimated repair costs if issues arise
While modern engines are efficient, it is common to consider a professional intake clean as the vehicle reaches higher mileage to ensure the V6 keeps breathing efficiently.
To keep that signature Audi handling, you might eventually need to budget for replacing specific control arm bushes if you notice any changes in steering feedback.
Given the performance of the S4, these components are designed to work hard; if the car is nearing the end of its current set, factor this into your future budget planning for high-quality replacements.
Noticed something inaccurate or missing?Suggest an edit→
Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer