Bosch Glow Plug Set Toyota LandCruiser 1HZ HZJ78 HZJ79 HZJ105 (Set of 6)

Bosch glow plug set to suit Toyota LandCruiser 1HZ engines including HZJ78, HZJ79 and HZJ105 models.

Includes all 6 glow plugs required for a full replacement to restore cold starting performance.

Common fix for hard starting and excessive cranking on 1HZ diesel engines.

This is a complete glow plug set for 1HZ diesel engines.

Glow plugs are responsible for:

• Pre-heating the combustion chamber
• Assisting cold starts
• Ensuring smooth initial running

When they begin to fail, you’ll notice:

• Hard starting (especially cold)
• Excess cranking
• White smoke on startup
• Rough idle when cold

Replacing the full set ensures consistent performance across all cylinders.

Vehicle Compatibility

• Toyota LandCruiser HZJ78
• Toyota LandCruiser HZJ79
• Toyota LandCruiser HZJ105
• Engine: 1HZ 4.2L Diesel

Common Questions

How many glow plugs does a 1HZ have?

6 — this kit includes the full set.

Should I replace all of them or just one?

Best practice is to replace all 6 together to avoid uneven performance.

What are the symptoms of bad glow plugs?

Hard starting, smoke on startup, and rough running when cold.

Are these a service item?

Yes — they wear over time and are commonly replaced as maintenance.