Hitachi Astemo HPP0021 left direct injection high pressure fuel pump for the 2007-2009 Audi A8 Quattro V8 4.2L and other vehicles raises fuel pressure for the direct injection system. It lifts fuel from supply pressure to the higher pressure the injectors need.
- Mechanical pump type
- External pump, mounted outside the fuel tank
- Male terminal gender for the electrical connection
Quick facts
- Part: Hitachi Astemo HPP0021 direct injection high pressure fuel pump
- Fits: 2007-2009 Audi A8 Quattro V8 4.2L and other vehicles
- Position: Left
- Condition: New
Long cranking, rough running or a drop in power can have several sources in the fuel system. If a failed pump is the cause, this one replaces it. Before ordering, look over the pump and its connections with the engine off and cool for fuel wetness or staining; a shop can run pressure tests.
Fits
The 2007-2009 Audi A8 Quattro V8 4.2L, the 2007-2009 Audi Q7 V8 4.2L and the 2008-2009 Audi S5 V8 4.2L all fit this pump, and so do other vehicles. It is a new, actual OE part for them.
Specifications
Fit and size
- Position: Left
- Quantity per vehicle: 1
- Terminal gender: Male
Build and materials
- Pump type: Mechanical
- Mounting: External, not in the tank
- Gasket or seal: not included
- Condition: New
- Country of origin: Germany
In the box
One direct injection high pressure fuel pump for the left side; the left side takes one. A gasket or seal is not included, so plan on getting a new one.
Interchange: 079 127 025 AF · 079 127 025C · HM10040
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
HM10040, 079 127 025 AF, 079 127 025C
Frequently Asked Questions
Does the Hitachi Astemo HPP0021 fit a 2007-2009 Audi Q7 V8 4.2L?
Yes. The Hitachi Astemo HPP0021 left direct injection high pressure fuel pump fits the 2007-2009 Audi Q7 V8 4.2L. For any other car, look in the Vehicles it fits section on this page.
Does this high pressure fuel pump come with a gasket or seal?
No. This listing is one left direct injection high pressure fuel pump, and a gasket or seal is not included.
Is this pump an in-tank or an external type?
This pump is external and mechanical, not an in-tank unit. Its country of origin is Germany.
Which symptoms can a weak direct injection high pressure fuel pump bring on?
A long crank, rough running or a loss of power can be signs of a weak direct injection high pressure fuel pump. A shop can test fuel pressure to check it.
Does the Hitachi Astemo HPP0021 replace part number 079 127 025C?
Yes. 079 127 025C is one of the numbers the Hitachi Astemo HPP0021 left direct injection high pressure fuel pump replaces.
