CARFIX

Audi 100 Cat (1985–1990)

The Audi 100 (C3), produced from 1985 to 1990, is a testament to Audi's commitment to aerodynamics and exceptional build quality. While it might not be as commonly seen on New Zealand roads, those who drive this classic appreciate the rich German engineering and sophisticated design it offers. With simpler mechanics than modern models, it's a favorite among enthusiasts who enjoy a deeper, hands-on connection with their vehicle.

Parts for the Audi 100 Cat

Known issues

Common issues on these older Audi 100 models include rust (especially around wheel arches, sills, and the fuel filler), worn suspension components (bushings, ball joints), and issues with the Bosch fuel injection systems. The automatic transmissions, if fitted, can also be prone to problems with age, so check for smooth shifting. Pay close attention to the condition of rubber seals and hoses, as these will likely be brittle and prone to leaks. Also, ensure the cooling system is in good order to avoid overheating, which can be catastrophic for these engines.

WOF tips

When inspecting an Audi 100 for a WOF, pay careful attention to rust in the areas mentioned above. Check all lights are functioning correctly (headlights, taillights, indicators). Suspension components need to be in good condition with no excessive play. Brake lines and hoses must be free of leaks and in good condition. Ensure the tyres meet the minimum tread depth requirements, and the windscreen is free from cracks that could obstruct the driver's vision. Exhaust systems must be leak-free and meet noise emission standards.

About the Audi 100 Cat

Throughout its production years, the Audi 100 came in various configurations, including sedans and Avants (wagons). Engine choices featured a range of inline four-cylinder and five-cylinder engines, delivering a comfortable ride rather than sports car performance. Some models offered the advanced Quattro all-wheel-drive system, perfect for navigating New Zealand's varied landscapes with confidence. The well-appointed interiors prioritized driver comfort and ergonomics, yet finding a pristine example today can be a challenge due to age-related wear.

As a proud owner, it's essential to stay on top of maintenance to keep your Audi 100 running smoothly. It's worth noting that the cooling system should be checked around 150,000km, with particular attention to the water pump, thermostat, and radiator hoses. Regular coolant flushes and checks can prevent overheating issues, which have historically plagued these engines. Coupled with the common need for front and rear brake services, it’s vital to stay proactive. You’ll want to explore our Cooling, Braking, and Filtration categories to ensure your classic Audi remains in top condition. Additionally, be aware of potential rust around wheel arches and sills, and monitor your suspension components for wear, particularly the bushings and ball joints. Keeping up with these aspects can enhance your ownership experience and preserve the charm of this legendary vehicle.

Questions owners ask

What are some common rust areas I should inspect on my Audi 100 (1985-1990) for a WOF?
When preparing your Audi 100 for a Warrant of Fitness, pay close attention to rust, especially around the wheel arches, sills, and the fuel filler area. These are common spots where rust can develop and cause a WOF failure.
Where can I get brake pads or other brake components for my 1985-1990 Audi 100 in New Zealand?
CARFIX stocks 72 SKUs for the Audi 100 (1985-1990), including parts in our Braking category. You can find brake pads, rotors, and other braking components on our website to keep your Audi 100 stopping safely.
My Audi 100 is overheating. What are the likely causes and how often should I check the cooling system?
Overheating can be a common issue in older Audi 100 models. Check the water pump, thermostat, and radiator hoses for leaks or damage. It's recommended to inspect the cooling system around 150,000km and perform regular coolant flushes to prevent overheating. Explore our Cooling category for replacement parts.
What kind of maintenance should I be doing on the suspension of my Audi 100?
Given the age of the Audi 100, worn suspension components are a common issue. Regularly inspect the bushings and ball joints for wear and replace them as needed to maintain proper handling and ride comfort.
What are some common issues to watch out for with the Audi 100's fuel injection system?
The Bosch fuel injection systems in the Audi 100 can sometimes develop issues with age. Keep an eye out for rough running, poor fuel economy, or difficulty starting. Regular fuel filter replacements can help prevent problems. CARFIX stocks fuel filters for the Audi 100 in our Filtration category.
What should I check on my Audi 100 to ensure it passes a WOF?
To pass a WOF, ensure all lights are functioning correctly, suspension components are in good condition, brake lines and hoses are free of leaks, tyres meet minimum tread depth, and the windscreen is free from cracks. Also, the exhaust system must be leak-free and meet noise emission standards. Rust is a major factor, especially around wheel arches and sills.
How often should I change the oil in my Audi 100?
The recommended service interval for the Audi 100 is 10,000km. This includes an oil and filter change to keep the engine running smoothly. CARFIX stocks oil filters suitable for your Audi 100 in our Filtration category.