Vehicles using BZG engine list:

Engine BZG

Symptoms:
- Rough idling and stalling, especially when cold
- Loss of power and poor acceleration
- Increased fuel consumption
- Engine warning light illumination
- Occasional misfires or hesitation during acceleration

Diagnosis:
- Check for faulty ignition coils or spark plugs causing misfires
- Inspect the throttle body for carbon buildup affecting airflow
- Test the fuel injectors for clogging or leakage
- Scan for error codes related to sensors such as the MAF (Mass Air Flow) or oxygen sensors
- Examine the timing chain tensioner for wear or noise, as timing issues can affect performance

Fixes:
- Replace worn or faulty spark plugs and ignition coils to restore proper combustion
- Clean the throttle body to remove carbon deposits and improve airflow
- Service or replace clogged fuel injectors to ensure correct fuel delivery
- Replace faulty sensors identified by diagnostic trouble codes to optimize engine management
- If timing chain tensioner wear is detected, replace the tensioner and inspect the chain for stretch or damage to prevent engine timing issues

Prevention:
- Follow regular maintenance schedules, including timely spark plug and air filter changes
- Use quality fuel and perform periodic fuel system cleaning to prevent injector clogging
- Regularly clean the throttle body during servicing intervals
- Monitor engine warning lights promptly and address issues early to avoid further damage
- Ensure oil changes are performed on time to maintain proper lubrication of timing components and prevent premature wear

By adhering to these diagnostic steps, fixes, and preventive measures, owners of Seat Ibiza, Skoda Roomster, Skoda Fabia II, and VW Polo equipped with the BZG engine can maintain reliable performance and avoid common engine issues.