Honda throttle body gasket Civic Coupe Si K20Z3 16176-RBC-004

Throttle body gasket Honda 16176-RBC-004 – Civic Coupe Si K20Z3

Genuine Honda throttle body gasket 16176-RBC-004 designed for Civic Coupe Si with K20Z3 engine (2006–2011). This gasket seals the joint between the throttle body and the intake manifold, preventing air leaks that can cause unstable idle, incorrect air–fuel mixture and loss of performance.

When should you replace the throttle body gasket?

• Whenever the throttle body is removed for cleaning or servicing.
• When upgrading the intake manifold or throttle body on the K20Z3 engine.
• If you notice rough idle, unmetered air leaks or fuel trims out of range after work on the intake.
• As preventative maintenance on hard-driven or modified Civic Si cars.

Compatibility – Honda Civic Coupe Si K20Z3

This gasket fits Honda Civic Coupe Si equipped with the K20Z3 petrol engine in the following years:

• Honda Civic Coupe Si – 2006–2011 – engine code K20Z3

FAQ – Honda throttle body gasket 16176-RBC-004

Do I need a new gasket after cleaning the throttle body?
Yes – Honda recommends replacing the gasket whenever the throttle body is removed to ensure proper sealing and to avoid unmetered air leaks.

Is this gasket reusable?
In practice, it should be treated as a single-use part. Reusing a compressed gasket can lead to small leaks and unstable idle.

Is this a genuine Honda part?
Yes, this is a genuine Honda gasket with the OEM number 16176-RBC-004, not an aftermarket replacement.