Honda Civic/RSX/ILX Headlight Bulb Seal 33126-S3V-A01

Honda OEM Rubber Headlight Access Cap - 33126-S3V-A01

You're changing a headlight bulb on your RSX or Si or Type R and you reach behind the headlight to pull off the rubber cap. It's cracked. It's torn. It's missing entirely because the previous owner lost it during their bulb job or 20 years of underhood heat finally broke it. Without that cap sealing the back of the housing water and condensation get inside the headlight. You're looking at a fogged lens inside the housing. This is genuine Honda OEM part 33126-S3V-A01. It's the rubber cap that seals the bulb access opening on the back of your headlight housing. A few bucks. Saves you the headlight. Replace the cap when it's cracked or missing. Don't drive around without it.

Here's What Happens When the Cap's Missing or Damaged

The rubber cap seals the bulb access opening on the back of the headlight housing. When you pull off the cap to change the bulb you're exposing that opening to the outside world. Road spray. Rain. Engine bay humidity. Washer fluid. All of that's trying to get inside the housing. The cap goes back on and seals the opening so none of that contamination gets in. When the cap's missing or damaged the opening's exposed. Moisture gets past the housing and ends up condensing on the inside of the headlight lens. Once water's inside the housing it corrodes the reflective coating. The lens fogs from the inside. The headlight gets dim and yellowed. You can't see the road at night. You're also shortening the life of any bulb you put in there because moisture's attacking it from the inside. Eventually the reflective coating's so corroded you need a new headlight assembly. All because the rubber cap was missing. Replace the cap and keep the moisture out.

Molded Rubber - Seals the Opening

This is molded rubber designed to seal against the lip on the back of the headlight housing. The rubber's the right durometer so it compresses and creates a water-tight seal when you press it on. The shape matches the opening exactly so it seats correctly. You're not forcing a generic cap onto a housing it doesn't fit. The molded design means it seals the way Honda engineered it to seal. Direct replacement.

Replace It When You're Changing the Bulb - Do It Right

If you're pulling the headlight cap to change a bulb and the cap's cracked or torn replace it now. You're already in there. The cap costs nothing. We've seen people reinstall a torn cap because they figure it's good enough. Six months later the headlight's fogged from the inside and they're looking at a replacement assembly. Don't do that. If the cap's damaged replace it. We've also seen people lose the cap during a bulb change and just leave the opening uncovered. They think it's temporary. Then they forget about it. Months go by. Water gets in the housing. The lens fogs. The headlight dims. They're wondering why their headlights look terrible. The cap was missing the whole time. Replace it immediately if you lose it.

Honda OEM Cap - Right Material, Right Seal

This is genuine Honda OEM part 33126-S3V-A01. It's the cap Honda installs at the factory on headlight assemblies. The molded rubber's the correct durometer for Honda headlight housings. The shape matches the housing opening. It seals the way it's supposed to seal. Aftermarket rubber caps exist. Some are fine. Some are cheap knockoffs that don't compress right. We've seen aftermarket caps that don't seal properly and water still gets inside the housing. We've seen cheap rubber that hardens after a year and cracks. We've seen caps that don't fit the opening properly because the molding's off. The headlight cap's the last line of defense against water getting inside the housing. It's not where you cheap out with a knockoff cap. Buy the Honda cap. It seals. It lasts. You install it once and the headlight stays dry.

What You Get

• Honda OEM rubber headlight access cap - part number 33126-S3V-A01
• Molded rubber construction
• Genuine Honda cap - not aftermarket
• Direct replacement for cracked or missing caps
• One cap per order

Fits These Cars

• 2013-2015 Acura ILX
• 2013-2014 Acura ILX Hybrid
• 2001-2006 Acura MDX
• 2015- Acura RDX
• 2005-2006 Acura RSX Base/Type S
• 2006-2011 Honda Civic DX/EX/LX/Si Coupe
• 2016-2021 Honda Civic EX/Sport/Si/Type R
• 2007-2008 Honda Element
• 2019-2022 Honda HR-V
• 2019-2025 Honda Passport
• 2016-2022 Honda Pilot
• 2017-2026 Honda Ridgeline

Note: Rubber headlight bulb access cap for Honda and Acura models. Genuine Honda OEM part 33126-S3V-A01. Molded rubber seals bulb access opening on back of headlight housing. Cap prevents water and condensation from entering headlight housing. Missing or damaged cap causes moisture inside housing, corroded reflective coating, fogged lens, dimmed headlight. Replace when cap cracked, torn, or missing. Install on dry, clean housing surface (use isopropyl alcohol to clean mating surface). One cap per order. Most vehicles need two caps (one per headlight).