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 3.8 GDI Lambda II engine is known for higher-than-normal oil consumption, which can lead to engine wear if not monitored and managed properly.

Some owners have reported timing chain tensioner problems, which can cause noise and, if left unattended, potential engine damage.

The direct injection system can suffer from clogged or failing fuel injectors, leading to poor performance and misfires.

Due to the GDI design, carbon buildup on intake valves is a common issue, affecting engine efficiency and performance.

Radiator and water pump failures have been noted, which can lead to overheating and engine damage if not addressed.

Faulty sensors, such as the mass airflow sensor or oxygen sensors, can cause engine performance issues and trigger the check engine light.

Some drivers report engine knocking or pinging sounds, which could be related to fuel quality or internal engine component wear.

The Hyundai Genesis Coupe with the G 3.8 GDI Lambda II engine is known to have higher than average oil consumption, which can lead to more frequent oil changes and potential engine damage if not monitored regularly.

The timing chain tensioner can wear out prematurely, causing a rattling noise and possibly leading to timing chain issues if not addressed promptly.

Direct Injection (GDI) engines, like the Lambda II, are prone to carbon buildup on intake valves, which can result in rough idling, reduced performance, and lower fuel efficiency.

Issues with the cooling system, such as leaks from the water pump or radiator, can lead to engine overheating if not identified and repaired in a timely manner.

Failure of the crankshaft position sensor can lead to engine stalling, poor acceleration, and difficulty starting the engine.

Ignition coil problems can cause misfires, reduced engine performance, and decreased fuel efficiency.

Clogged or malfunctioning fuel injectors can lead to poor engine performance, rough idling, and decreased fuel economy.

The GDI Lambda II engine is known for higher oil consumption, which can lead to frequent top-offs and potential engine damage if not monitored.

Due to the direct injection system, carbon deposits can accumulate on the intake valves, affecting performance and fuel efficiency.

Some owners have reported issues with the timing chain, which can lead to engine misfires and severe engine damage if not addressed.

Faulty fuel injectors can cause rough idling, poor acceleration, and overall reduced engine performance.

Pre-detonation or knocking can occur, often due to issues with the fuel system or carbon build-up, potentially causing long-term engine damage.

Problems with the cooling system, such as radiator or thermostat failures, can lead to overheating and possible engine damage.

The engine is prone to developing oil leaks, which can lead to lower oil levels and potential engine damage if not fixed.

Faulty ignition coils can cause misfires, rough idling, and poor acceleration.

The DOHC Lambda engine in the 2011 Hyundai Genesis Coupe is known for developing oil leaks, often due to valve cover gasket failures.

Some users report problems with the timing chain tensioner, leading to potential engine damage if not addressed.

Direct injection engines like the DOHC Lambda can suffer from carbon build-up on the intake valves, affecting performance and fuel efficiency.

There have been instances of radiator and water pump failures, leading to overheating issues.

Some owners have reported instances of the engine stalling, often linked to issues with the fuel system or ignition components.

Malfunctioning sensors, such as the crankshaft position sensor, can lead to rough idling, misfires, and other performance issues.

Fuel injectors can become clogged or fail, causing poor engine performance and reduced fuel economy.

The 3.8 GDI Lambda II engine is known for higher-than-normal oil consumption, which can lead to engine wear if not monitored and managed properly.

Some owners have reported timing chain tensioner problems, which can cause noise and, if left unattended, potential engine damage.

The direct injection system can suffer from clogged or failing fuel injectors, leading to poor performance and misfires.

Due to the GDI design, carbon buildup on intake valves is a common issue, affecting engine efficiency and performance.

Radiator and water pump failures have been noted, which can lead to overheating and engine damage if not addressed.

Faulty sensors, such as the mass airflow sensor or oxygen sensors, can cause engine performance issues and trigger the check engine light.

Some drivers report engine knocking or pinging sounds, which could be related to fuel quality or internal engine component wear.

The Hyundai Genesis Coupe with the G 3.8 GDI Lambda II engine is known to have higher than average oil consumption, which can lead to more frequent oil changes and potential engine damage if not monitored regularly.

The timing chain tensioner can wear out prematurely, causing a rattling noise and possibly leading to timing chain issues if not addressed promptly.

Direct Injection (GDI) engines, like the Lambda II, are prone to carbon buildup on intake valves, which can result in rough idling, reduced performance, and lower fuel efficiency.

Issues with the cooling system, such as leaks from the water pump or radiator, can lead to engine overheating if not identified and repaired in a timely manner.

Failure of the crankshaft position sensor can lead to engine stalling, poor acceleration, and difficulty starting the engine.

Ignition coil problems can cause misfires, reduced engine performance, and decreased fuel efficiency.

Clogged or malfunctioning fuel injectors can lead to poor engine performance, rough idling, and decreased fuel economy.

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.