Keep your crankcase ventilation system sealed tight with the Dorman - HELP PCV Valve Grommet 42058. This small but essential grommet seats and secures the PCV valve, maintaining a seal around the valve opening so crankcase vapors are drawn through the intended PCV path. It installs as a direct-fit replacement across a broad range of Lexus and Toyota applications — including the 1990-1991 Lexus ES250, 1990-2000 Lexus LS400, 1988-2006 Toyota Camry, and 1988-2003 Toyota 4Runner — see the Buyer's Guide tab for the complete list of 39 applications.
- Secure PCV seal: holds the PCV valve in its mounting opening and forms a seal to keep the crankcase ventilation system closed.
- Addresses vacuum leaks: if a cracked, hardened, or missing grommet is the cause of a vacuum leak or rough idle, this replaces it.
- Direct replacement: a pliable grommet designed to restore the original seal on the listed applications.
The grommet is part of the positive crankcase ventilation system, sealing the opening around the PCV valve while blow-by vapors are routed from the crankcase back into the intake. Over time, grommets can dry out, crack, or shrink, which can create an unmetered air leak and contribute to a rough idle or oil seepage. If the grommet is the source of the leak, replacing it restores the proper seal — diagnose the cause before replacing related components.
Interchange: 039-6428 · 0396428 · 420583 · GV21 · 9048018001 · Manufacturer part number 42058
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does the PCV valve grommet do?
It seats and seals the PCV valve in its mounting opening, keeping the crankcase ventilation system sealed so blow-by vapors are routed through the intended PCV path.
What are the signs this grommet may need replacing?
A cracked, hardened, shrunken, or missing grommet can cause an unmetered air (vacuum) leak, rough idle, or oil seepage around the PCV valve. Diagnose the cause before replacing.
Will this fit my vehicle?
It's listed for 39 Lexus and Toyota applications, including the 1990-2000 Lexus LS400 and 1988-2006 Toyota Camry. Check the Buyer's Guide tab for the full list.
What numbers does this grommet interchange with?
It cross-references 039-6428 (0396428), 420583, GV21, and 9048018001. Its manufacturer part number is 42058.
Is the PCV valve included with this grommet?
No. This listing is for the PCV valve grommet only; the PCV valve is not included.
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