Honda R18A/L15A/LEA1 EGR Pipe Lower Gasket B 18719-RNA-A01

Genuine Honda EGR Pipe Lower Gasket B 18719-RNA-A01 - Civic, Fit, HR-V, Insight, CR-Z & Acura ILX

This genuine Honda EGR Pipe Lower Gasket B (part number 18719-RNA-A01, also referenced as 18719RNAA01) fits 2006-2015 Honda Civic, 2009-2013 Honda Fit, 2016-2022 Honda HR-V, 2010-2014 Honda Insight, 2011-2016 Honda CR-Z, and 2013-2015 Acura ILX on R18A, L15A, and LEA1 engines. It seals the lower connection between the EGR pipe and the exhaust manifold. When this gasket starts going, you'll usually catch exhaust smell in the cabin or under the hood before a code even sets. It's a cheap fix compared to chasing an exhaust leak after the job is done.

Replace It While the EGR Pipe Is Already Off

If you're pulling your EGR pipe for any reason, swap this gasket at the same time. EGR pipe gaskets do not reseal once they've been torqued down and disturbed. Reusing the old one is the most common way to end up with a fresh exhaust leak right after reassembly. At under $10, there is no reason to skip it when it's already sitting right there.

Why Genuine OEM Matters Here

The EGR system on R18A, L15A, and LEA1 engines runs hot exhaust gas through a narrow pipe under real pressure cycles. Aftermarket gaskets for this application are often cut from generic sheet material that doesn't match the original port geometry or compression thickness. A genuine Honda gasket is stamped to the exact spec Honda engineered for this joint - correct port opening, correct compressed thickness, correct material for the heat range. That means one installation, sealed right, no callbacks. Cross-reference part number: 18719RNAA01. Also compatible with select Acura models (2013-2015 Acura ILX automatic, 2013-2014 Acura ILX Hybrid). Acura cross-reference: 18719-RNA-A01.

Vehicle Fitment

Compatible Engines

• R18A
• R18 (HR-V)
• L15A
• LEA1

Specifications

• Honda OEM part number: 18719-RNA-A01 (also listed as 18719RNAA01)
• Genuine Honda OEM replacement part
• EGR Pipe Lower Gasket B
• Seals lower EGR pipe connection at the exhaust
• Position: Lower connection, typically below catalytic converter on R18 engines

Note: This is the lower EGR pipe gasket at the exhaust connection. If you're replacing the full EGR pipe assembly, check whether you also need the upper gasket where the pipe connects to the EGR valve - those are two separate parts. Acura ILX fitment is automatic transmission models only.