The Dynamic Brake Support (DBS) may not activate correctly, leading to delayed or insufficient braking assistance during emergencies.

The in-line 4-cylinder engine configuration can sometimes lead to uneven cooling, causing the engine to overheat, especially in high-performance situations.

The engine may experience power loss due to issues like clogged fuel injectors or malfunctioning turbochargers, impacting the engine's ability to deliver the expected horsepower.

The 4-cylinder engine may encounter misfire issues, often due to faulty spark plugs, ignition coils, or fuel delivery problems.

The engine model PYUKD may have vulnerabilities in its gasket seals or oil pan, leading to oil leaks which can cause further engine damage if not addressed.

The in-line engine configuration might face timing chain wear and stretch over time, leading to poor engine performance and potential engine damage.

The engine might not achieve optimal fuel efficiency due to issues like dirty air filters, malfunctioning oxygen sensors, or improper fuel mixture.

Various sensors in the engine could fail or send incorrect signals, causing the check engine light to activate and indicating a need for diagnostic testing.

The DBS system may not engage correctly, leading to reduced braking assistance during emergency stops.

Misfires can occur due to faulty spark plugs, ignition coils, or fuel injectors, resulting in poor engine performance and reduced fuel efficiency.

Oil leaks can originate from the valve cover gasket, oil pan gasket, or other seals, leading to potential engine damage if not addressed promptly.

Problems with the radiator, water pump, or thermostat can cause the engine to overheat, potentially leading to severe engine damage.

A worn or damaged timing chain/belt can cause the engine to run poorly or fail to start, and if it breaks, it can result in significant engine damage.

If the Mazda3 model includes a turbocharger, problems can arise from a failing turbo, including reduced power and efficiency, and possible engine damage.

Clogged fuel filters, failing fuel pumps, or dirty injectors can lead to poor engine performance and starting issues.

Faulty oxygen sensors, mass airflow sensors, or other engine management sensors can lead to incorrect air-fuel mixture, reducing performance and increasing emissions.

Problems with the engine control unit (ECU) or other electronic components can lead to a variety of engine performance issues and diagnostic trouble codes.

Issues with the catalytic converter, muffler, or other exhaust components can lead to increased emissions, poor engine performance, and noise.

Cracks or leaks in the intake manifold can cause air leaks, leading to poor engine performance and increased fuel consumption.