Description:

This flexible diaphragm fits beneath the brake master cylinder reservoir cap. It forms a barrier between the brake fluid and the vented airspace above it, helps limit moisture and contamination, and flexes as the reservoir level changes. Replace it if torn, hardened, swollen or permanently distorted, and seat it evenly before reinstalling the cap.

Replaces OEM #45520-371-003

• Fits beneath the brake master cylinder reservoir cap
• Flexes with normal brake fluid level changes
• Helps limit moisture and contamination in the reservoir

Fits

• 1987 Honda GL1200A
• 1987 Honda GL1200I
• 1990 Honda GL1500
• 1990-2000 Honda GL1500SE