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Pierburg Air Injection Pump 7.21851.31.0
Air Injection Pump
PIERBURG Air Injection Pump - 7.21851.31.0
Pierburg Air Injection Pump 7.21851.31.0
Air Injection Pump
PIERBURG Air Injection Pump - 7.21851.31.0

Pierburg Air Injection Pump 7.21851.31.0

PIERBURG
Availability:
in stock, ready to be shipped
SKU 7.21851.31.0
$429.33 - $429.33
$429.33
$429.33 - $429.33
$429.33
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We show live inventory for in-stock items. Products may sell out due to high demand but are restocked regularly. Out-of-stock items can still be ordered and usually arrive within a few weeks.

The Pierburg Air Injection Pump (part 7.21851.31.0) is a secondary air injection pump designed to reduce cold-start emissions on a wide range of Audi and Volkswagen vehicles from the 1990s through 2000s. It supplies extra air to the exhaust system to help the catalytic converter reach operating temperature faster, improving emissions performance and engine efficiency. This direct replacement pump matches OEM part 078906601M and ensures reliable operation.

Key Features & Benefits

  • Direct Replacement: Exact fit for OEM part 078906601M, no modifications needed.
  • OEM Quality: Manufactured by Pierburg, a trusted OE supplier for Audi and Volkswagen.
  • Emissions Reduction: Injecting air into the exhaust system during cold starts lowers harmful emissions.
  • Improved Efficiency: Helps the catalytic converter reach optimal temperature quickly for better fuel economy.

Vehicle Fitment

Make Model Years Engine
AUDI A3 (8L1) 1996–2003 1.8 T
AUDI A3 (8L1) 1998–2003 1.8 T quattro
AUDI A3 (8L1) 1999–2002 S3 quattro
AUDI A4 B5 (8D2) 1994–2000 1.8
AUDI A4 B5 (8D2) 1995–2000 1.8 T
AUDI A4 B5 (8D2) 1996–2000 2.8
AUDI A4 B5 (8D2) 1996–2001 2.8 quattro
AUDI A4 B5 (8D2) 1997–2000 2.4
AUDI A4 B5 (8D2) 2000 1.6
AUDI A4 B5 Avant (8D5) 1994–2001 1.6
AUDI A4 B5 Avant (8D5) 1996–2001 1.8
AUDI A4 B5 Avant (8D5) 1997–2001 2.4
AUDI A4 B5 Avant (8D5) 2000–2001 1.6
AUDI A4 B6 (8E2) 2000–2004 1.6
AUDI A4 B6 (8E2) 2001–2004 2.4
AUDI A4 B6 Avant (8E5) 2001–2004 2.4
AUDI A4 B6 Convertible (8H7) 2002–2005 2.4
AUDI A4 B7 (8EC) 2004–2008 1.6
AUDI A4 B7 Avant (8ED) 2004–2008 1.6
AUDI A6 C5 (4B2, 4B4) 1997–2005 2.4
AUDI A6 C5 (4B2, 4B4) 1998–2005 4.2 quattro
AUDI A6 C5 (4B2, 4B4) 1999–2005 S6 quattro
AUDI A6 C5 Avant (4B5, 4B6) 1997–2005 2.4
AUDI A6 C5 Avant (4B5, 4B6) 1998–2005 4.2 quattro
AUDI A6 C5 Avant (4B5, 4B6) 1999–2005 S6 quattro
AUDI TT (8N3) 1998–2006 1.8 T
AUDI TT (8N3) 2002–2006 1.8 T
AUDI TT (8N3) 2005–2006 1.8 T
AUDI TT Roadster (8N9) 1999–2006 1.8 T
AUDI TT Roadster (8N9) 2000–2006 1.8 T quattro
AUDI TT Roadster (8N9) 2001–2006 1.8 T
AUDI TT Roadster (8N9) 2005–2006 1.8 T
VW BORA I (1J2) 1998–2013 2.0
VW BORA I (1J2) 2000–2005 1.8 T
VW BORA I (1J2) 2002–2005 1.8 T
VW BORA Variant (1J6) 1999–2005 2.0
VW BORA Variant (1J6) 2000–2005 1.8 T
VW BORA Variant (1J6) 2002–2005 1.8 T
VW GOLF IV (1J1) 1997–2005 1.8 T
VW GOLF IV (1J1) 1998–2004 2.0
VW GOLF IV (1J1) 2001–2005 1.8 T GTI
VW GOLF IV Cabriolet (1E7) 1998–2002 2.0
VW GOLF IV Variant (1J5) 1999–2006 2.0
VW GOLF IV Variant (1J5) 2000–2006 1.8 T
VW GOLF IV Variant (1J5) 2002–2006 1.8 T
VW PASSAT B5 (3B2) 1996–2000 1.8 T
VW PASSAT B5 (3B2) 1997–2000 2.3 VR5 Syncro/4motion
VW PASSAT B5 Variant (3B5) 1997–2000 1.8 T

Technical Specifications

Part Number 7.21851.31.0
OEM Cross-Reference 078906601M

About Pierburg

Pierburg is a leading OEM manufacturer of emission control components, trusted by Audi and Volkswagen for original equipment quality.

This part also goes by the following cross reference.

Cross Reference Part Number: 078906601M

Fits These Vehicles 99 applications
8L A3
Make Model Engine Years
AUDI A3 (8L1) 1.8 T 1996–2003
AUDI A3 (8L1) 1.8 T quattro 1996–2003
AUDI A3 (8L1) 1.8 T quattro 1998–2003
AUDI A3 (8L1) 1.8 T 1998–2003
AUDI A3 (8L1) S3 quattro 1999–2002
B5 A4
Make Model Engine Years
AUDI A4 B5 (8D2) 1.8 1994–2000
AUDI A4 B5 (8D2) 1.6 1994–2000
AUDI A4 B5 (8D2) 1.8 T 1995–2000
AUDI A4 B5 (8D2) 1.8 T quattro 1995–2000
AUDI A4 B5 (8D2) 1.8 quattro 1995–2000
AUDI A4 B5 (8D2) 2.8 1996–2000
AUDI A4 B5 (8D2) 2.8 quattro 1996–2001
AUDI A4 B5 (8D2) 2.4 1997–2000
AUDI A4 B5 (8D2) 2.4 quattro 1997–2000
AUDI A4 B5 (8D2) 2.4 1997–2000
AUDI A4 B5 (8D2) 1.6 2000–2000
AUDI A4 B5 Avant (8D5) 1.6 1994–2001
AUDI A4 B5 Avant (8D5) 1.8 1996–2001
AUDI A4 B5 Avant (8D5) 1.8 T 1996–2001
AUDI A4 B5 Avant (8D5) 1.8 T quattro 1996–2001
AUDI A4 B5 Avant (8D5) 2.8 1996–2001
AUDI A4 B5 Avant (8D5) 2.8 quattro 1996–2001
AUDI A4 B5 Avant (8D5) 1.8 quattro 1996–2001
AUDI A4 B5 Avant (8D5) 2.4 1997–2001
AUDI A4 B5 Avant (8D5) 2.4 quattro 1997–2001
AUDI A4 B5 Avant (8D5) 2.4 1997–2001
AUDI A4 B5 Avant (8D5) 1.6 2000–2001
B6 A4
Make Model Engine Years
AUDI A4 B6 (8E2) 1.6 2000–2004
AUDI A4 B6 (8E2) 2.4 2001–2004
AUDI A4 B6 Avant (8E5) 2.4 2001–2004
AUDI A4 B6 Avant (8E5) 1.6 2001–2004
AUDI A4 B6 Convertible (8H7) 2.4 2002–2005
B7 A4
Make Model Engine Years
AUDI A4 B7 (8EC) 1.6 2004–2008
AUDI A4 B7 Avant (8ED) 1.6 2004–2008
C5 A6
Make Model Engine Years
AUDI A6 C5 (4B2, 4B4) 2.4 1997–2005
AUDI A6 C5 (4B2, 4B4) 2.8 1997–2005
AUDI A6 C5 (4B2, 4B4) 2.8 quattro 1997–2005
AUDI A6 C5 (4B2, 4B4) 1.8 1997–2005
AUDI A6 C5 (4B2, 4B4) 2.4 1997–2005
AUDI A6 C5 (4B2, 4B4) 2.4 quattro 1997–2005
AUDI A6 C5 (4B2, 4B4) 1.8 T 1997–2005
AUDI A6 C5 (4B2, 4B4) 1.8 T quattro 1997–2005
AUDI A6 C5 (4B2, 4B4) 4.2 quattro 1998–2005
AUDI A6 C5 (4B2, 4B4) 2.4 1998–2005
AUDI A6 C5 (4B2, 4B4) S6 quattro 1999–2005
AUDI A6 C5 Avant (4B5, 4B6) 2.4 1997–2005
AUDI A6 C5 Avant (4B5, 4B6) 2.8 quattro 1997–2005
AUDI A6 C5 Avant (4B5, 4B6) 2.8 1997–2005
AUDI A6 C5 Avant (4B5, 4B6) 1.8 1997–2005
AUDI A6 C5 Avant (4B5, 4B6) 2.4 1997–2005
AUDI A6 C5 Avant (4B5, 4B6) 2.4 quattro 1997–2005
AUDI A6 C5 Avant (4B5, 4B6) 1.8 T 1997–2005
AUDI A6 C5 Avant (4B5, 4B6) 1.8 T quattro 1997–2005
AUDI A6 C5 Avant (4B5, 4B6) 4.2 quattro 1998–2005
AUDI A6 C5 Avant (4B5, 4B6) 2.4 1998–2005
AUDI A6 C5 Avant (4B5, 4B6) S6 quattro 1999–2005
MK1 TT
Make Model Engine Years
AUDI TT (8N3) 1.8 T 1998–2006
AUDI TT (8N3) 1.8 T quattro 1998–2006
AUDI TT (8N3) 1.8 T quattro 1998–2006
AUDI TT (8N3) 1.8 T 2002–2006
AUDI TT (8N3) 1.8 T 2005–2006
AUDI TT (8N3) 1.8 T quattro 2005–2006
AUDI TT (8N3) 1.8 T 2005–2006
AUDI TT Roadster (8N9) 1.8 T 1999–2006
AUDI TT Roadster (8N9) 1.8 T quattro 1999–2006
AUDI TT Roadster (8N9) 1.8 T quattro 2000–2006
AUDI TT Roadster (8N9) 1.8 T 2001–2006
AUDI TT Roadster (8N9) 1.8 T 2005–2006
AUDI TT Roadster (8N9) 1.8 T 2005–2006
AUDI TT Roadster (8N9) 1.8 T quattro 2005–2006
MK4 Jetta
Make Model Engine Years
VW BORA I (1J2) 2.0 1998–2013
VW BORA I (1J2) 1.8 T 2000–2005
VW BORA I (1J2) 1.8 T 2002–2005
VW BORA Variant (1J6) 2.0 1999–2005
VW BORA Variant (1J6) 1.8 T 2000–2005
VW BORA Variant (1J6) 1.8 T 2002–2005
MK4 Golf
Make Model Engine Years
VW GOLF IV (1J1) 1.8 T 1997–2005
VW GOLF IV (1J1) 2.0 1998–2004
VW GOLF IV (1J1) 1.8 T GTI 2001–2005
VW GOLF IV Cabriolet (1E7) 2.0 1998–2002
VW GOLF IV Variant (1J5) 2.0 1999–2006
VW GOLF IV Variant (1J5) 1.8 T 2000–2006
VW GOLF IV Variant (1J5) 1.8 T 2002–2006
B5 Passat
Make Model Engine Years
VW PASSAT B5 (3B2) 1.8 T 1996–2000
VW PASSAT B5 (3B2) 1.8 1996–2000
VW PASSAT B5 (3B2) 1.8 Syncro/4motion 1996–2000
VW PASSAT B5 (3B2) 1.6 1996–2000
VW PASSAT B5 (3B2) 2.3 VR5 1996–2000
VW PASSAT B5 (3B2) 2.8 V6 1996–2000
VW PASSAT B5 (3B2) 2.8 V6 Syncro/4motion 1996–2000
VW PASSAT B5 (3B2) 2.3 VR5 Syncro/4motion 1997–2000
VW PASSAT B5 Variant (3B5) 1.8 T 1997–2000
VW PASSAT B5 Variant (3B5) 1.8 1997–2000
VW PASSAT B5 Variant (3B5) 1.8 Syncro/4motion 1997–2000
VW PASSAT B5 Variant (3B5) 1.6 1997–2000
VW PASSAT B5 Variant (3B5) 2.3 VR5 1997–2000
VW PASSAT B5 Variant (3B5) 2.3 VR5 Syncro/4motion 1997–2000
VW PASSAT B5 Variant (3B5) 2.8 V6 1997–2000
VW PASSAT B5 Variant (3B5) 2.8 V6 Syncro/4motion 1997–2000

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