2018 Audi A4

Here’s a comprehensive breakdown of common issues and complaints for the 2018 Audi A4, categorized by system and specific to engine/transmission options where applicable.

The 2018 Audi A4 is a popular luxury sedan known for its stylish design, refined interior, and engaging driving experience. It was offered with two main engine options: a 2.0-liter turbocharged four-cylinder (TFSI) in two states of tune and the S4 which has the 3.0-liter turbocharged V6. The base 2.0T produced 190 horsepower and 236 lb-ft of torque, while the higher-output version made 252 horsepower and 273 lb-ft of torque. All A4s came standard with front-wheel drive, with all-wheel drive (Quattro) available. The 2.0T engine could be paired with either a 7-speed S-tronic dual-clutch automatic transmission, or a 6-speed manual transmission (limited availability). Owners often praise the A4 for its fuel efficiency, technology features, and comfortable ride. However, some common complaints include electrical glitches, oil consumption (specifically the higher-output 2.0T), and the responsiveness of the infotainment system.

Engine

2.0L TFSI (190 hp/236 lb-ft)

• No Known Issues

2.0L TFSI (252 hp/273 lb-ft)

• Excessive Oil Consumption
  • Description/Symptoms: Owners report needing to add oil frequently between scheduled oil changes. Blue smoke may be visible from the exhaust. The oil consumption may vary based on driving conditions.
  • Solution: Replacing the piston rings is a common fix, but Audi has also released updated PCV valves and software updates aimed at reducing oil consumption. In severe cases, engine replacement may be necessary.
  • Estimated Cost to Fix: $3,000 - $8,000+ (depending on the repair and if engine replacement is needed).
  • Recalls: None Found

Transmission

7-Speed S-Tronic Dual-Clutch Automatic

• Rough Shifting/Hesitation
  • Description/Symptoms: Some owners experience rough shifting, particularly at low speeds, or hesitation when accelerating from a stop. The transmission may also exhibit jerky behavior or fail to properly engage a gear.
  • Solution: A software update to the transmission control module (TCM) may resolve the issue. In some cases, the Mechatronic unit (valve body) within the transmission may need to be replaced. Clutch replacement may also be required in high-mileage vehicles.
  • Estimated Cost to Fix: $200 (for software update) - $3,000+ (for Mechatronic unit replacement or clutch replacement).
  • Recalls: None Found

Suspension

• No Issues Found

Electrical

• Infotainment System Freezing/Rebooting
  • Description/Symptoms: The MMI (Multi Media Interface) system may freeze, become unresponsive, or randomly reboot while driving. This can affect navigation, audio, and other vehicle functions.
  • Solution: Software updates for the MMI system are often released to address these issues. If the problem persists, the MMI control unit may need to be replaced.
  • Estimated Cost to Fix: $150 (for software update) - $1,200+ (for MMI unit replacement).
  • Recalls: None Found
• Sensor Malfunctions (Parking Sensors, etc.)
  • Description/Symptoms: Erroneous readings or complete failure of parking sensors, blind spot monitoring, or other driver-assistance systems.
  • Solution: Replacement of the faulty sensor or module. Diagnostic scanning to identify the specific issue is crucial.
  • Estimated Cost to Fix: $200 - $800+ (depending on the sensor and labor).
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• Rattling/Squeaking Noises
  • Description/Symptoms: Rattling or squeaking noises emanating from the dashboard, door panels, or rear deck.
  • Solution: Identifying the source of the noise and applying felt tape or other dampening materials to prevent contact between components. Tightening any loose trim pieces.
  • Estimated Cost to Fix: $50 - $500 (depending on the complexity of the repair.
  • Recalls: None Found

Summary

The 2018 Audi A4 is generally a reliable vehicle, but some common issues do exist. The higher-output 2.0L engine is prone to excessive oil consumption, which can be a costly repair if left unaddressed. Electrical glitches with the infotainment system and sensor malfunctions are also fairly common. While not all A4s will experience these problems, it’s important to be aware of them and have a pre-purchase inspection performed to identify any potential issues before buying a used 2018 A4. The severity and cost of these issues range from minor inconveniences to potentially expensive repairs.