Dorman 904-856 vacuum pump for the 2012-2017 Jeep Wrangler and other vehicles supplies vacuum to the vacuum-operated functions on the vehicle. An electric motor drives the pump, which is designed to help restore operation of those functions.
- Dorman OE Solutions line
- Electric motor drive with a 1.4 in diameter diaphragm
- Barbed vacuum connector with a 0.38 in inlet
- Female rectangular electrical connector with 2 blade terminals
- Metal housing
Quick facts
- Part: Dorman 904-856 vacuum pump
- Fits: 2012-2017 Jeep Wrangler and other vehicles
- Material: Metal housing
- Condition: New
Vacuum-operated functions that respond weakly or stop responding can mean the pump is wearing out, but a leaking hose or loose fitting can produce similar symptoms. Before replacing the pump, look over its hoses and electrical connector with the engine off for cracks, looseness or damage. One pump goes on each vehicle.
Fits
As a vacuum pump replacement for the 2012-2017 Jeep Wrangler, it also fits the 2011-2015 Jeep Grand Cherokee, the 2011-2022 Dodge Charger and many other vehicles.
Specifications
Fit and size
- Quantity per vehicle: 1
- Inlet port: 0.38 in outside diameter, 0.255 in inside diameter
- Outlet port: 0.23 in outside diameter, 0.09 in inside diameter
- Diaphragm diameter: 1.4 in
- Electrical terminals: 2 blade terminals
Build and materials
- Type: electric, electric motor drive
- Vacuum connector: barbed
- Electrical connector: female, rectangular
- Housing material: metal
- Diaphragm: included
- Relief valve: no
- Condition: new
- Country of origin: China
In the box
One vacuum pump assembly. Mounting hardware, a gasket or seal and a pulley are not included, and old fasteners may not be reusable, so plan on new ones.
Interchange: AP39 · 4581485AD · 4581541AB · 4581586AA · 4581586AB · 4581672AB · 5154322AA · 5154322AB · 13275080 · 20914523 · 22804112 · 23258870 · AIP30 · VCP136 · VCP199 · 31201707 · 31317445 · 31317530
This part cross-references / interchanges with the following part numbers:
AP39, 4581485AD, 4581541AB, 4581586AA, 4581586AB, 4581672AB, 5154322AA, 5154322AB, 13275080, 20914523, 22804112, 23258870, AIP30, VCP136, VCP199, 31201707, 31317445, 31317530
Frequently Asked Questions
Is Dorman 904-856 the right Jeep Wrangler vacuum pump for a 2012-2017 Jeep Wrangler?
Yes, Dorman 904-856 fits the 2012-2017 Jeep Wrangler, one pump per vehicle. For another car, look up its year and model in the "Vehicles it fits" section on this page.
What comes with the Dorman vacuum pump 904-856?
Dorman 904-856 comes as one vacuum pump assembly with its diaphragm. Mounting hardware, a gasket or seal and a pulley are not included.
What are the port sizes on the Dorman electric vacuum pump?
The inlet port is 0.38 in outside diameter and 0.255 in inside diameter. The outlet port is 0.23 in outside diameter and 0.09 in inside diameter.
What can a weak vacuum pump do to vacuum-operated controls?
Vacuum-operated functions can respond weakly or stop responding, though a leaking hose or fitting can do the same. A shop can test the pump itself, since that check needs the vehicle running.
Does Dorman 904-856 replace number 4581586AA?
Yes. 4581586AA is one of the interchange numbers listed for Dorman 904-856, along with the other cross-reference numbers on this page.
