Condition note from our inspection: Used, potentially small signs of wear, fully functional and tested. Clean and complete with reservoir, cap and level-sensor lead; bore, flange and ports intact. Not pressure tested or bench bled - brake parts should be inspected and fitted by a qualified technician. 30 Day Seller Paid Return Store Policy. Ships fast with tracking.
🚚 Shipping: $5.50 (weight-based flat rate; a whole order never ships for more than $35).
Ships from Mesa, AZ within 1 business day · estimated delivery 3–7 business days (continental US).
↺ Returns: Seller Pays Return within 30 days.
🧾 Sales tax for your state is added at checkout after you enter your address.
Dorman First Stop brake master cylinder assembly, part number M630585, supplied with the fluid reservoir, cap and low-fluid level sensor lead fitted. Replaces Honda OE master cylinder assembly 46100-SJC-A71.
Please verify fitment before purchasing. Part numbers are listed for cross-reference and fitment guidance only. Confirm your exact year, model and trim, and compare the two-bolt mounting flange, the pushrod bore, the port locations and the reservoir in the photos against your own master cylinder.
Key Features
1 in. (25.4 mm) bore
Cylinder housing constructed to match the casting material of the original part for similar performance
All rubber components made from a high-quality EPDM compound for resistance to glycol-based brake fluid
Made entirely of new materials – not rebuilt – for consistent quality and safety
Manufactured to meet SAE International standards
What's Included
1 x Dorman M630585 master cylinder assembly with reservoir, cap and level-sensor lead, exactly as pictured
No brake fluid, mounting nuts, gasket, brake lines or fittings are included
Condition
Used. The unit is clean and complete with no visible damage; the bore, flange, ports and pushrod are intact and the reservoir and cap are present, as shown in the photos. It shows only light handling marks. Brake components are safety-critical – this part has not been pressure tested or bench bled, so please have it inspected and fitted by a qualified technician, and bench bleed the cylinder before installation.
30-day returns – seller pays return shipping. Ships fast with tracking from Arizona. Honda and Ridgeline are trademarks of Honda Motor Co. and are referenced here for fitment purposes only.
