The DOHC MPI Lambda engine in the 2012 Hyundai Genesis Coupe is known to sometimes consume more oil than expected, which can lead to low oil levels if not monitored regularly.

Some owners have reported problems with the timing chain tensioner, which can cause a rattling noise and potentially lead to more serious engine damage if not addressed.

The fuel injectors can become clogged or fail, leading to poor engine performance, misfires, and decreased fuel efficiency.

There have been instances of coolant leaks from various components of the cooling system, which can lead to engine overheating if not repaired.

Due to the direct injection system, carbon build-up on the intake valves is a common issue, potentially causing rough idling, reduced performance, and increased emissions.

Some drivers have reported engine knocking or pinging, which could be related to issues with the fuel quality, ignition timing, or engine components.

The DOHC T MPI THETA-FR engine in the 2012 Hyundai Genesis Coupe is known to develop oil leaks, often from the valve cover gasket or the oil pan gasket.

This engine can experience timing chain tensioner failure, which can lead to a rattling noise and, if not addressed, potential engine damage.

The turbocharger in the Genesis Coupe can fail prematurely, leading to reduced power and performance.

Fuel injectors can become clogged or fail, causing poor engine performance and misfires.

There have been reports of the engine overheating, often due to issues with the cooling system, such as a failing water pump or radiator problems.

Direct injection engines like the Theta-FR can suffer from carbon buildup on the intake valves, leading to reduced performance and efficiency.

Some owners have reported engine knocking or pinging, which can be caused by issues such as poor fuel quality or problems with the ignition system.

Various engine sensors, such as the oxygen sensor or mass airflow sensor, can fail, leading to poor engine performance and check engine light warnings.

The DOHC MPI Lambda engine in the 2012 Hyundai Genesis Coupe is known to sometimes consume more oil than expected, which can lead to low oil levels if not monitored regularly.

Some owners have reported problems with the timing chain tensioner, which can cause a rattling noise and potentially lead to more serious engine damage if not addressed.

The fuel injectors can become clogged or fail, leading to poor engine performance, misfires, and decreased fuel efficiency.

There have been instances of coolant leaks from various components of the cooling system, which can lead to engine overheating if not repaired.

Due to the direct injection system, carbon build-up on the intake valves is a common issue, potentially causing rough idling, reduced performance, and increased emissions.

Some drivers have reported engine knocking or pinging, which could be related to issues with the fuel quality, ignition timing, or engine components.