Audi RS4/RS5 B8 Maintenance Guide

Audi RS4/RS5 B8 Maintenance Guide

Owning an Audi RS4 or RS5 B8 is an exciting experience, but like any high-performance vehicle, it requires careful and consistent maintenance to ensure it runs smoothly. The 4.2-litre V8 engine powering these models is a remarkable piece of engineering, but to keep it in top condition, regular service and attention to key areas are crucial. In this guide, we'll walk you through the main maintenance tasks and the Audi service schedule, which outlines the intervals for servicing based on both distance and time.

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Oil and Filter Changes

The most important aspect of keeping your Audi RS4 or RS5 B8 running smoothly is regular oil changes. Audi recommends changing the oil and filter every 10,000 miles (16,000 km) or 12 months, whichever comes first.

Running the engine with dirty or low oil can lead to increased wear and potential engine damage, so it's essential to stick to this interval. If the car is driven in harsh conditions (frequent short trips, high-speed driving, or heavy traffic), more frequent oil changes may be necessary.

Spark Plugs

The spark plugs are an important part of maintaining the engine's performance. Audi recommends replacing the spark plugs every 40,000 miles (64,000 km) or every 4 years. If you notice misfires, rough idling, or reduced performance, it may be time for a check or replacement before the scheduled interval.

Air Filters

The RS4/RS5’s engine requires clean air to perform at its best. The air filters should be checked every 20,000 miles (32,000 km), and replaced if necessary. This is particularly important if the car is driven in areas with heavy dust or pollution. A clogged air filter can restrict airflow and reduce engine performance.

Brake Fluid

For the RS4 and RS5, brake fluid should be changed every 2 years (regardless of mileage). Brake fluid can absorb moisture over time, which can lead to a reduction in braking efficiency or potential corrosion in the braking system. Always ensure that the brake fluid is replaced within this interval to maintain the car's braking performance.

Transmission Fluid

The S-Tronic dual-clutch transmission in the RS4 and RS5 is designed to be low-maintenance, but it still requires attention. Audi recommends changing the transmission fluid every 40,000 miles (64,000 km) or every 4 years. This helps to ensure smooth gear changes and prolongs the life of the transmission.

Timing Chain and Tensioners

While the 4.2-litre V8 engine uses a timing chain (which is more durable than a timing belt), it's still important to keep an eye on its condition. Audi doesn’t specify a fixed interval for timing chain replacement, but owners should be vigilant for signs of chain wear or noise. If you notice any unusual rattling sounds from the front of the engine, it may indicate a problem with the timing chain or tensioners, and it’s best to have it checked.

Coolant and Antifreeze

The coolant should be replaced every 5 years or 75,000 miles (120,000 km), whichever comes first. Over time, coolant degrades and can lose its protective properties, leading to potential overheating or damage to the engine. Audi recommends using a specific type of coolant for their vehicles, so make sure to check the owner's manual for the correct specifications.

Brake Pads and Discs

Given the performance nature of the RS4/RS5, the brakes endure significant stress, especially if the car is used for spirited driving. Check the brake pads every 10,000 miles (16,000 km) for wear, and replace them as necessary. Audi recommends replacing the brake discs every 40,000 to 60,000 miles (64,000 to 96,000 km) depending on wear, but it’s important to inspect the discs regularly for any signs of cracks or warping.

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Suspension and Steering

The RS4 and RS5 B8 feature dynamic suspension systems designed to offer excellent handling and ride comfort. Regularly inspect the suspension components, including shocks, springs, and bushings, for signs of wear. Audi recommends a thorough suspension inspection every 40,000 miles (64,000 km). Pay attention to any unusual noises, such as clunking or rattling sounds, as these may indicate worn suspension components.

Tyres

Tyres are a critical safety component, and with the high-performance nature of the RS4/RS5, tyre care is especially important. Audi recommends checking the tyres regularly for wear, especially after every 6,000 miles (10,000 km) or after long trips. Make sure the tyres are rotated regularly to ensure even wear, and check that the tread depth is above the legal minimum of 1.6mm. Always ensure that your tyres are properly inflated to avoid excessive wear and ensure optimum performance.

Battery

The RS4/RS5’s battery should be inspected at least once a year. While Audi doesn’t specify an exact replacement interval, batteries typically last between 4 and 6 years, depending on usage and climate. If you notice dimming headlights, slow engine turnover, or other signs of electrical trouble, the battery may need to be replaced.

Other Key Checks

In addition to the above, there are a few other things you should regularly monitor:

• Fuel System: Audi recommends cleaning the fuel system every 30,000 miles (48,000 km) to avoid any build-up that could affect performance. Using high-quality fuel can help reduce the need for this service.
• Exhaust System: Inspect the exhaust system for leaks, rust, or damage every 30,000 miles (48,000 km), especially if the car is driven on salty roads in winter.

Conclusion

Owning an Audi RS4 or RS5 B8 means you're behind the wheel of a performance-oriented machine that requires regular care to maintain its driving experience and longevity. By following Audi’s recommended service intervals, you can ensure that your car continues to perform at its best, avoid unexpected issues, and ultimately protect your investment.

Always remember, sticking to the recommended maintenance schedule and using genuine Audi parts will help keep your RS4 or RS5 in top condition. If you're unsure about any aspect of your car’s maintenance, it’s always a good idea to consult a specialist or Audi service centre for advice.