Genuine Honda Left Cylinder Head Cover - Part Number: 12320-ZVL-405ZA
A genuine used dark-grey left-hand valve or cylinder-head cover for Honda BF175D, BF200D, BF225D and BF250D V6 four-stroke outboards.
The cover encloses and seals the left-bank camshafts and valve gear. It retains lubricating oil within the cylinder head and protects the upper valvetrain from water, dirt and accidental contact.
⚙️ Key Features
Genuine Honda Marine left cylinder-head cover
Correct Honda part number 12320-ZVL-405ZA
NH8 Dark Gray factory finish
Used on Honda D-series V6 engines
Matches right cover 12310-ZVL-405ZA
🚤 Compatibility
Commonly used on
Honda BF175D left cylinder head
Honda BF200D left cylinder head
Honda BF225D left cylinder head
Honda BF250D left cylinder head
Typically suits
Engine models:
Honda BF175D
Honda BF200D LDA
Honda BF200D LRA
Honda BF200D XRA
Honda BF225D LDA
Honda BF225D LRA
Honda BF225D UCRA
Honda BF225D XRA
Honda BF250D LDA
Honda BF250D LRA
Honda BF250D UDA
Honda BF250D UCRA
Honda BF250D XCDS
HP Range: 175HP - 250HP
Engine Type: Honda V6 four-stroke outboard
Year Range: Approximately 2012 onward
🔌 Function
The cover seals the left cylinder-head valvetrain and retains lubricating oil around the camshafts, rocker components and valves.
⚠️ Common Signs of Failure
Oil seeping around the cover edge
Cover cracked or warped
Damaged gasket channel
Broken bolt or mounting location
Breather or hose fitting damaged
🔄 Supersession & Cross Reference
OEM Supersession Chain
12320-ZVL-405ZA current dark-grey left cylinder-head cover reference
OEM / Related Numbers
12320-ZVL-405ZA
12320ZVL405ZA
Colour Code: NH8 Dark Gray
12322-ZVL series related left head-cover gasket
12310-ZVL-405ZA matching right cylinder-head cover
900-series related cylinder-head cover bolts
17131-ZVL-000ZA related intake-manifold upper cover
