

🛠️ Upgrade your brake game with precision and durability you can trust!
The Dorman M390303 Brake Master Cylinder is a 100% new, precision-engineered replacement part designed to meet or exceed OEM standards for select Chrysler, Jeep, and Plymouth models. Featuring a durable EPDM rubber compound resistant to glycol-based brake fluid and manufactured to strict SAE specifications, it ensures reliable braking performance and a perfect fit confirmed via an easy-to-use garage tool.










| ASIN | B001PYNWUU |
| Best Sellers Rank | #139,126 in Automotive ( See Top 100 in Automotive ) #171 in Automotive Replacement Brake Hydraulic Parts |
| Brand | Dorman |
| Customer Reviews | 4.4 4.4 out of 5 stars (245) |
| Date First Available | January 13, 2009 |
| Exterior | Machined |
| Item Weight | 1.8 pounds |
| Item model number | M390303 |
| Manufacturer | Dorman Products |
| Manufacturer Part Number | M390303 |
| Model | M390303 |
| OEM Part Number | 13-3180; 130.67018; 13036; 131.67018; 783-40018; 83-40018; F131464; M-87018; M2708; M900983; MC131464; MC390303; NM2708; 4761941; 4882872 |
| Product Dimensions | 9.1 x 5.1 x 4.7 inches |
A**R
OEM quality
OEM fitment and fixed my sinking brake pedal on my 95 Grand Cherokee 5.2! Just have to purchase a bench bleed kit separately.
Y**.
Direct replacement for my 99 Cherokee XJ
This is a direct-fit replacement for my 1999 Jeep Cherokee XJ. Installed with no issues, appears to have solid OEM quality. Great price too - I’m sure I would have paid 100’s of dollars if I had a shop replace.
S**N
Great OEM Replacement Part
Replaced an original master cyclinder on a 2001 Jeep XJ. Came with a bench bleeding kit/instructions, new fluid reservoir cap. Does not come with mounting nuts. Perfect fit and now the brakes work great.
R**.
Best price
Used this on my '89 Cherokee for ABS conversion. Fit perfectly on matched power booster. Brakes work. Definitely bench bleed this because of the angle of the MC once installed. Be aware, the front brake reservoir goes dry alarmingly quick when manual bleeding. Does come with MC base sealing O-ring. Did not come with bench bleeding kit. Best price around.
B**Z
2001 Cherokee direct fit
2001 xj direct bolt on. great quality. make sure you prime it first. go watch a video.
L**W
Fit perfectly.
Follow directions closely for install, once it was bench bled it installed easily and is still working a few thousand miles later.
C**S
Works Perfect
Brakes were really squishy, like had to floor them. Installed this new master cylinder and brakes are great again!
J**H
Wtf guys
Purchased master cylinder and when arrived didn't have the plugs needed to do bench bleed. Had to go all the way to the hardware store 20 miles away where I spent 8$ on overpriced bolts to do the job. Then bolts allowed air into cylinder so I had to use Teflon tape which I then had to painstakingly remove with tweezers after the job. It was just a little mistake that cost me a lot of time and effort. Took 4 hours to do an hour long job. Wtf guys
C**R
Ajustó Perfecto en mi Cherokee Sport 2000
J**N
Perfect
B**Y
Worked but had to re tap the threads.
M**V
Producto llegó bien y a tiempo. Sello entre el contenedor de plástico y el cilindro venía defectuoso y se sale el líquido por ahí en cantidades pequeñas. Recomiendo comprar de mejor calidad piezas para los frenos
Trustpilot
5 days ago
1 month ago