I've got a rattle or vibration around 1300 to 1500 rpm (annoying as that's about 30 mph).

I've found that it's definitely the air box doing it. Is this common? It seems to be screwed down properly and tightly.

At first I thought it was the second air intake thing as the top had a broken clip but I replaced that.

What have other people done to fix it?

A rattling air box is definitely not common, this is the first time I read about in the last 15 years of experience with an S2.

You'll have to find out exactly what is rattling and solve that.

If you want usable tips, it might be an idea to tell a bit more about your Superb, especially the motor type and model year may be useful...

9 minutes ago, andrehj said:

A rattling air box is definitely not common, this is the first time I read about in the last 15 years of experience with an S2.

You'll have to find out exactly what is rattling and solve that.

If you want usable tips, it might be an idea to tell a bit more about your Superb, especially the motor type and model year may be useful...

Maybe rattle is the wrong word. Resonating would be more accurate. It's definitely the air box as it stops when I put my hand on it. It's 2.0 tdi cr170.

I asked my friendly AI:

AI Overview

A rattle from the airbox on a Mk2 Skoda Superb is commonly caused by deteriorated or missing rubber mounting grommets holding the airbox to the engine bay, causing it to vibrate

. Other causes include a loose intake snorkel, a poorly fitting engine cover/airbox lid, or broken plastic clips, particularly on TDI models. 

Common Causes for Airbox Rattles:

• Failed Mounting Grommets: The rubber mounts that secure the airbox to the engine break down, resulting in direct plastic-to-metal contact and rattling.

• Loose Intake Snorkel: The air intake ducting (snorkel) leading to the front grille may become loose.

• Poorly Sealed Airbox Lid: The lid of the airbox may not be seated properly, or its clips may be broken.

• Airbox Hitting Components: The airbox may vibrate against the engine cover, bulkhead, or nearby hoses. 

How to Fix It:

• Replace Rubber Mounts: Check the rubber mountings under the airbox and replace them if they are broken or worn.

• Secure the Intake: Check that the plastic snorkel is firmly attached to the front grill area.

• Tighten the Airbox: Ensure all clips on the airbox lid are secure. Using thin rubber or foam tape to seal the box or prevent it from touching surrounding parts can resolve the issue. 

I hope this helps 🤞

1 minute ago, Trickiejohn said:

I asked my friendly AI:

AI Overview

A rattle from the airbox on a Mk2 Skoda Superb is commonly caused by deteriorated or missing rubber mounting grommets holding the airbox to the engine bay, causing it to vibrate

. Other causes include a loose intake snorkel, a poorly fitting engine cover/airbox lid, or broken plastic clips, particularly on TDI models. 

Common Causes for Airbox Rattles:

• Failed Mounting Grommets: The rubber mounts that secure the airbox to the engine break down, resulting in direct plastic-to-metal contact and rattling.

• Loose Intake Snorkel: The air intake ducting (snorkel) leading to the front grille may become loose.

• Poorly Sealed Airbox Lid: The lid of the airbox may not be seated properly, or its clips may be broken.

• Airbox Hitting Components: The airbox may vibrate against the engine cover, bulkhead, or nearby hoses. 

How to Fix It:

• Replace Rubber Mounts: Check the rubber mountings under the airbox and replace them if they are broken or worn.

• Secure the Intake: Check that the plastic snorkel is firmly attached to the front grill area.

• Tighten the Airbox: Ensure all clips on the airbox lid are secure. Using thin rubber or foam tape to seal the box or prevent it from touching surrounding parts can resolve the issue. 

I hope this helps 🤞

This is helpful. Thanks