
Audi A4L's 20,000-kilometer maintenance items: Replace the engine oil and three filters, also check whether the spark plugs need replacement, whether the throttle needs carbon deposit cleaning, and inspect the brakes and chassis. The 20,000-kilometer maintenance is usually the car's third maintenance. The regular items for the car's third maintenance include replacing the engine oil, oil filter, air filter, spark plugs, etc. The Audi A4L has a body length, width, and height of 4858mm, 1847mm, and 1439mm respectively, with a wheelbase of 2908mm. It is equipped with a 2.0T turbocharged engine, matched with a 7-speed dual-clutch transmission. The maximum power of this engine is 110kW, and the maximum torque is 270Nm.

I just completed the 20,000 km maintenance for my Audi A4L, and the service was quite comprehensive. The engine oil and oil filter must be replaced, especially for German cars which have high requirements for oil quality—it's best to use the manufacturer-specified grade. The cabin air filter and engine air filter were also replaced. Since I did the maintenance in early summer, the air conditioning immediately became odor-free after the replacement. The spark plugs were a key focus; although there were no noticeable issues while driving, the mechanic insisted that turbocharged engines require mandatory replacement at 20,000 km to prevent ignition failures. Other checks included tire wear and pressure adjustment, brake pad thickness inspection, chassis bolt tightening, and brake fluid moisture content testing. Finally, the technician scanned for fault codes using the computer to confirm all vehicle systems were functioning properly. After the maintenance, remember to get the service checklist stamped—don’t miss any items during the warranty period.

The core maintenance items for the Audi A4L at 20,000 kilometers are the five-piece set: engine oil and oil filter, air filter, cabin air filter, spark plugs, and comprehensive inspection. Use fully synthetic oil with 0W-20 or 5W-40 viscosity—after changing, the engine sound becomes noticeably smoother. For the cabin air filter, it's recommended to choose one with activated carbon, especially in northern regions where willow catkins are abundant in spring, as it provides better filtration. Don't underestimate the small spark plugs—they directly affect the ignition efficiency of the turbocharged engine, and delaying replacement may increase fuel consumption. The comprehensive inspection includes checking for loose ball joints in the chassis, measuring brake disc thickness, tire rotation and balancing, as well as functional tests for lights and wipers. It's best to supervise the maintenance process to avoid missing any items.

The 20,000-kilometer maintenance is essentially divided into three categories: must-replace parts, inspection items, and value-added services. Must-replace parts include engine oil, oil filter, dual filters, and spark plugs. Last time at the 4S shop, it cost me 1,800 yuan. The inspection items focus on tire tread depth and brake disc thickness—my front brake pads still have 6mm left, so no need to replace them. Additionally, they checked the antifreeze freezing point, battery life, and chassis rubber bushings. For value-added services, I opted for air conditioning pipeline sterilization and carbon deposit detection, as the humid climate in the south can easily lead to mold. It's advisable to take a photo of the odometer before maintenance to avoid disputes later. The entire process takes about two hours, so it's best to book the first slot in the morning.


