Dorman - First Stop Brake Master Cylinder P/N:M39704
Turn pedal effort into hydraulic brake pressure with the Dorman First Stop Brake Master Cylinder M630029, a direct-fit Jeep Grand Cherokee master cylinder for 2006-2010 models that also fits the 2006-2010 Jeep Commander, with all engines listed for both. Dorman designed it to match the original master cylinder's design, function and performance on these applications, and it is made from new, high-quality materials for a safe, durable replacement.
Specifications: 1.063 in. bore diameter and two outlets with M12 x 1.0 outlet threads. The package contains the master cylinder only. The reservoir, sensor and mounting hardware are not included. Country of origin: China.
The master cylinder converts force from the brake pedal into hydraulic pressure sent through the brake lines. A soft or sinking pedal, fluid leaking at the cylinder or a falling fluid level are signs it may need replacing. Other brake components can cause the same symptoms, so diagnose the cause first. Master cylinders are typically bench-bled before installation, and the brake system is bled afterward. Follow the vehicle service information.
Interchange: 100-2066 · 13-3217 · 10-3217 · 130.58008 · 355-42007
1002066 · 133217 · 103217 · 13058008 · 35542007 · 5175732AA · NM4217 · MC391001 · F143086 · MC143086
This part cross-references / interchanges with the following part numbers:
What does a brake master cylinder do?
It converts force from the brake pedal into hydraulic pressure and sends that pressure through its two outlets to the vehicle's brake circuits.
Will this Grand Cherokee master cylinder fit my Jeep?
It is listed as a direct-fit replacement for the 2006-2010 Jeep Grand Cherokee and the 2006-2010 Jeep Commander, all engines. Check the Buyer's Guide tab to confirm your vehicle.
Is the brake fluid reservoir included?
No. The package contains the master cylinder only. The reservoir, sensor and mounting hardware are not included, so consult the vehicle service information for what to transfer or replace and whether fasteners may be reused.
What are the specifications of the M630029?
It has an aluminum housing, a 1.063 in. bore diameter and two outlets with M12 x 1.0 threads. Its rubber components use an EPDM compound for resistance to glycol-based brake fluid.
What signs mean a master cylinder may need replacing?
A soft or sinking brake pedal, fluid leaking at the cylinder or a falling fluid level may be signs. Other brake parts can cause these symptoms too, so diagnose the cause first.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.