AUDI S5 2019 Best Upgrades Tyres Fluids Battery Care Keeping It Reliable

The 2019 AUDI S5 is a refined performance coupe/convertible with a punchy 3.0T V6, quattro grip and sophisticated electronics.
To keep it reliable and enjoyable you don’t need radical changes — targeted upgrades, correct tyre choices, the right fluids, smart battery care and a consistent routine are what matter most.
This compact guide covers practical, road-ready steps that balance performance, longevity and everyday usability.

Best Practical Upgrades

Focus on upgrades that improve handling, braking and longevity rather than short-lived power gains:

• Brake upgrades: OEM-equivalent high-friction pads (street/track blend) with quality rotors extend life and improve feel. Consider high-temp pads if you track the car often and stainless steel braided lines for firmer pedal response.
• Suspension: Progressive lowering springs or a well-sorted coilover system improves handling and stance. Pick a setup tuned for road comfort if you daily drive—stiffer isn’t always better for longevity.
• Wheels & tyres: Lighter forged wheels reduce unsprung mass and improve response. Use sizes that maintain proper rolling radius — check factory specs.
• Exhaust & intake: A high-quality cat-back exhaust can add sound without losing drivability. Avoid modifications that remove emissions equipment if you want to remain legal and preserve resale/warranty protections.
• Software tunes: ECU tunes can unlock extra power, but pick reputable shops and be mindful of warranty, emissions and the extra strain on drivetrain components.

Tyre Choices — What Works Best

Tyres influence safety, comfort and performance more than most other upgrades. Choose based on climate and driving priorities:

• Summer high-performance: Michelin Pilot Sport 4S, Pirelli P Zero, Continental SportContact provide superb grip in warm/dry/wet conditions — best for spirited driving and track days.
• All-season performance: Michelin CrossClimate 2 or Continental ExtremeContact DWS suit drivers who want year-round usability without swapping shoes. Note they sacrifice some peak grip versus summer tyres.
• Winter tyres: For snowy or icy climates, fit dedicated winter tyres such as Bridgestone Blizzak or Michelin X‑Ice on steel or matching wheels. Always switch to winter tyres when temperatures regularly fall below ~7°C (45°F).
• Fitment and pressures: Stick to the OEM recommended sizes and load ratings for wheel fitment. Check pressures cold and use factory-specified PSI for front/rear; monitor TPMS and adjust seasonally.

Fluids — What to Use and When

Always verify specifications in your owner’s manual or service data for the exact VW/AUDI part numbers and fluid specs.

• Engine oil: Use a high-quality fully synthetic oil meeting the VW/Audi specifications (e.g., VW 504 00 / 507 00 where applicable). Typical viscosities are 5W-30 or 5W-40 depending on region and load. Change intervals: follow the service schedule, commonly every 8,000–12,000 km (5,000–7,500 miles) or annually for spirited use.
• Coolant: Use Audi-approved coolant (G12/G12++ type long-life formulations specified by the dealer). Monitor levels and check freeze/boil protection periodically; replace per the manual (often around 5 years) or earlier if contaminated.
• Brake fluid: DOT 4 is commonly specified. Replace every 1–2 years to maintain boiling point and avoid moisture-related brake fade.
• Transmission & differential fluids: For the 8-speed automatic and quattro system, follow dealer intervals — many recommend a fluid service between 50k–80k miles. Use only manufacturer-approved ATF and diff oils.
• Power steering/other: Check levels and follow service manual for specific fluids and replacement intervals.

Battery Care — Keep It Healthy

The 2019 S5 often uses advanced battery technology (AGM) for start-stop and energy management. Proper battery care avoids annoying electrical issues.

• When replacing, use the correct type (likely AGM) and same capacity/terminal orientation. Cheap lead-acid swaps can trigger errors and reduced performance of start-stop systems.
• Keep terminals clean and secure. Use dielectric grease after cleaning to reduce corrosion.
• If you store the car or don’t drive often, use a smart maintainer (12–13.8V float/AGM-compatible) rather than a basic charger. For long storage, disconnect the battery or use a maintainer to prevent deep discharge.
• Diagnostics: if you see unusual electrical messages, have battery state-of-health tested — a failing battery can cause alternator strain and costly secondary failures.

Routine Items & Schedule

Keep a checklist and service history. Key routine items:

• Oil & filter: every 5k–10k miles depending on oil and driving habits.
• Tire rotation and alignment: rotate every 5k–7.5k miles and check alignment annually or after hitting potholes/curbs.
• Brake inspection: pads and rotors measured every oil change or sooner if you notice noise or reduced performance.
• Cabin & engine air filters: replace annually or per mileage to maintain HVAC and engine efficiency.
• Spark plugs: replace per manufacturer schedule (commonly 60k–100k miles for modern plugs) or when misfires occur.
• Software updates and recalls: keep ECU/software updates current at a dealer or authorized shop to avoid bugs and maintain system stability.

Practical Tips

• Keep service receipts and parts records — they preserve resale value and help track maintenance.
• Choose quality parts: OEM or reputable aftermarket parts usually save money in the long run.
• Be conservative with tuning: moderate tunes with supporting hardware (cooling, brakes, transmission service) extend drivetrain life.
• For major work, prefer shops experienced with Audi/VAG platforms to avoid compatibility or coding issues (especially for battery and electronic component replacement).

Final thoughts

The 2019 Audi S5 rewards owners who combine sensible upgrades with diligent maintenance. Prioritize tyres, brakes, correct fluids and appropriate battery technology to preserve safety and performance.
Small, regular investments — quality tyres, scheduled fluid changes, proper battery care and alignment — keep the S5 enjoyable and reliable for many miles.
If you choose performance upgrades, balance them with supporting hardware and professional tuning to protect the drivetrain and electronics.

FAQs

Q: What oil should I use in a 2019 Audi S5?

A: Use a fully synthetic oil meeting Audi/VW specifications (check the owner’s manual for the exact spec like VW 504 00/507 00). Typical viscosities are 5W-30 or 5W-40 depending on region and use. Follow recommended change intervals.

Q: When should I change the brake fluid?

A: Replace brake fluid every 1–2 years to maintain high boiling point and consistent braking performance, especially if you drive spiritedly or track the car.

Q: Are summer tyres worth it for the S5?

A: Yes — summer high-performance tyres give the best grip and response in warm/dry/wet conditions. If you live in a winter climate, switch to dedicated winter tyres for safety.

Q: What battery should I buy for replacement?

A: Use the correct type specified by Audi, often an AGM battery for vehicles with start-stop. Match capacity, terminal layout and coding requirements; have the new battery coded if required.

Q: Can I tune the S5 for more power?

A: Yes, but use reputable tuners and consider supporting upgrades (cooling, drivetrain reinforcement, brakes). Be aware of warranty/emissions implications and potential increased maintenance needs.

This guide is informational. For vehicle-specific recommendations and service intervals consult your Audi owner’s manual or a qualified Audi technician.