ACDelco Gold 18M1878 Brake Master Cylinder Assembly vs Dorman M390259 Brake Master Cylinder
Key Differences
Dorman (A) is positioned as the more affordable, precise replacement with new EPDM rubber components and non-remanufactured housing, while ACDelco (B) carries a higher-rated safety/testing distinction (meets SAE J1153/J1154) and slightly higher average review score. Choose Dorman if you want a lower-priced direct replacement with updated materials; choose ACDelco if you prefer a part marketed for meeting SAE testing and a marginally stronger average user rating
ACDelco Gold 18M1878 Brake Master Cylinder Assembly
Brake master cylinder assembly with SAE J1153/J1154 testing compatibility and rugged construction. Customers note easy fit and installation and solid value; some report durability concerns like leakage
Pros
- meets SAE J1153/J1154 testing
- reliable fit for proper installation
- easy to install
- quality build and value for money
Cons
- durability concerns: bleeds easily or leakage issues
Dorman M390259 Brake Master Cylinder
Brake master cylinder replacement with compatible housing and EPDM rubber components for brake fluid resistance. Includes user note that it installs in about 1–2 hours and fits well
Pros
- precise replacement housing
- EPDM rubber components
- new materials, not remanufactured
- meets SAE standards
Cons
- durability concerns reported by some customers
- leakage from front bottom seal reported
Head-to-Head
| Criteria | Winner |
|---|---|
| Price | Dorman |
| Durability | Tie |
| Versatility | Dorman |
| User Reviews | ACDelco |