A VW diesel injector pump pressurizes diesel fuel to extremely high pressures and meters it to the cylinders with correct timing. As the pumps get older, they can develop problems. The start/stopsolenoids can fail so that the pump either won't turn off or won't turn on. They can start to leak diesel fuel. Sometimes, they just wear And stop building the high pressures needed to pop the injectors, but this is rare.

Hans Auto Parts sells has been selling rebuilt VW diesel injector pumps for nearly 20 years.

Here are the injector pumps for sale here:

  Rebuilt Complete 1.6 Diesel Engine with Pump and Injectors
  Complete ALH MTDI Engine with Turbo, Manifolds and Downpipe. 10mm Rotor and .205mm nozzles.
  Rebuilt 99-05 ALH TDI Injector Pump (12mm) - $300 Core
  Rebuilt 96-99 1Z AHU TDI Injector Pump (10mm)-$300 Core
  Rebuilt Cummins 6BT VE Pump 12v
  Rebuilt Cummins 6B VE Pump 12v
  Rebuilt 99-05 ALH TDI Injector Pump (11mm)-$300 Core
  Rebuilt 99-05 TDI Injector Pump (10mm)- $300 Core
  Rebuilt Cummins 4BT Pump with Long Delivery Valves and Complex Timing
  Vanagon MTDI Injector Pump
  Rebuilt M-TDI Injector Pump (10mm ALH)-$150 Core
  Rebuilt M-TDI Injector Pump with a 10mm Rotor (1Z/AHU)
  028130107K Injector Pump (New Bosch Part)
  Rebuilt Eurovan AAZ Injector Pump with Hub
  Rebuilt 1.9 1Y Injector Pump
  Rebuilt 1.9AAZ Injector Pump for Vanagon
  Rebuilt 1.9AAZ Injector Pump
  Rebuilt 2.4 AAB Injector Pump
  Rebuilt 86-92 Turbo Diesel Injector Pump
  Rebuilt Vanagon Injector Pump ($150 Core)
  Rebuilt 82-85 Turbo Diesel Injector Pump
  Rebuilt 86-91 NA Injector Pump
  Rebuilt 91-92 Eco-Diesel Injector Pump
  1.6NA 79-85 Rebuilt Injector Pump
  Rebuilt 068130110N Injector Pump
  Rebuilt 85-86 NA Injector Pump
  Rebuilt 068130107T Turbo Vanagon Pump
  028906283P Injector Pump Timing Solenoid (Used OEM Bosch Part)
  BRM TDI Timing Belt Kit (038109119P & 038109243M & 038109244J & 045121011F)
  2002-2006 TDI BEW BHW Timing Belt Kit (038109119P & 038109243M & 038109244J & 038121011G)
  11mm Injector Pump Rotor for VW TDI
  Pump Housing and Shaft from 028130115G (New OEM Bosch OEM Part)
  Used Turbocharged Vanagon Injector Pump Cover Assembly
  028109119M/P Timing Belt 028109243F Tensioner 028109244 Roller & 3 Piece 95-99 TDI Tool Set
  1467212324 Vacuum Solenoid (OEM Part Removed from New 028130108E Pump)
  M-TDI Injector Pump Upgrade Package.
  1467030309 Feed Pump from 028130107K (OEM Part Removed From New Pump)
  Used Boost Enrichment Turbo Pump Top for 86-92 Pumps
  VW Diesel Injector Pump Timing Gauge
  TDI (1Z AHU - Pre 1999.5) Timing Belt Tool Set
  TDI (1Z AHU - Pre 1999.5) Timing Belt Tool Set
  Speed Control (OEM Part Removed from New Bosch Pump 028130107K)
  1 461 907 419 Speed Control
  TDI Injector Pump Top Cover (OEM Bosch Part Removed from 028130115G  / 0460404970)
  1999.5 -2006 TDI Timing Belt Tools
  Camplate for 1.9L Injector Pumps
  New Aftermarket Driveshaft for VW 1.9 AAZ Injector Pump
  068130301C/2C/3C/4C Injector Lines
  Injector Pump Speed Control
  Timing Spring and Plunger from 028130107K (New OEM Bosch OEM Part)
  Roller Cage (OEM Part from New Bosch Pump 028130107K)
  Throttle Assembly from 028130107K (New OEM Bsoch Part)
  Timing Advance Lever Assembly (OEM Part Removed from New Bosch Pump 028130107K)
  1466100310 Injector Pump Driveshaft
  Injector Pump Camplate for 1.6L
  Bosch 2 467 010 003 Rebuild Kit (OEM BOSCH Part) with ROT945816M Tool
  TDI Injector Pump Camplate
  Injector Pump Feed Pump for 1.6L
  ALH Injector Pump Hub
  ALH TDI Tool 2 Piece Set
  Cross Coupling (OEM Part Removed From a New Bosch TDI Injector Pump)
  Injector Pump Governor from 028130107K (New Bosch Part)
  N10213002 Glow Plugs Set of 4 (1979-1996)
  TDI Injector Pump Bearing Set (Small and Large)
  Cross Coupling (OEM Part Removed from New Bosch Pump 028130107K)
  RetainerPlate for Feed Pump (OEM Part Removed from New Bosch Pump 028130107K)
  Timing Plug (OEM Part from New Bosch Pump 028130107K)
  TDI Injector Pump Feed Pump
  028130111A Injector Pump Sprocket
  028130122B TDI Injector Fuel Return Valve
  Used. VW 1.6 Rabbit Injector Pump Cover
  Washer for Feed Pump (OEM Part Removed from New Bosch Pump 028130107K)
  Thrust Washer for Feed Pump (OEM Part Removed From a New Bosch TDI Pump)
  TDI Injector Pump Delivery Valve (Bosch OEM Part Removed From Bosch 0460404970 Pump)
  Roller Cage (OEM Part Removed From a New Bosch TDI Pump)
  Timing Plunger (OEM Part Removed From New Bosch Pump 028130115G)
  Timing Spring Cover (OEM Part Removed From New Bosch Pump 028130115G)
  Timing Spring (OEM Part Removed From New Bosch Pump 028130115G)
  Timing Spring Cover (OEM Part Removed From New Bosch Pump 028130115G)
  Timing Plug (OEM Part Removed From a New Bosch TDI Pump)
  ROT130122B Injector Pump Fuel Return Valve (New Bosch Part Removed from a New Bosch Pump)
  028130111C M-TDI Pump Sprocket
  028130111C Sprocket
  Retainer for Feed Pump (OEM Part Removed From a New Bosch TDI Pump)
  068198052A Rebuild Kit for Bosch VE Pumps
  038130465A Injector Pump Fuel Return Pipes (Used OEM Part)
  Used 028130147H Injector Pump Throttle Bracket
  1465530724 VW Pump LDA Cover (Used Bosch Part)
  Used ROT130142 Injector Pump Throttle Bracket
  ROT130465A Injector Pump Fuel Return Fitting (Used OEM Part)
  068130135 Magnetic Valve
  ROT130465C Injector Pump Fuel Intake Fitting (Used OEM Part)
  ROT130465D Injector Pump Fuel Intake Fitting (Used OEM Part)
  ROT130465E Injector Pump Fuel Intake Fitting (Used OEM Part)
  038130111A ALH Injector Pump Sprocket (Used)
  Used 028130147D Injector Pump Throttle Bracket
  Used 068130142A Injector Pump Throttle Bracket
  1460280301 Seal Ring (OEM Bosch Part)
  ROT945816N 3 Sided Bolt Remover for Bosch VE Pumps
  1460362313 Pump Pressure Valve
  Used TDI Injector Pump Temp Sender (Used OEM Part)
  ROT945816M 3 Sided Bolt Remover for TDI Injector Pumps
  ROT130465B Injector Pump Fuel Intake Nipple (Used OEM Part)
  1.6 VW Injector Pump Bearings
  068130173A/B/4 1.6 Diesel Injector Pump Front Stud Bows Set of 2 - Different Parts (Used OEM Parts)
  ROT130122 VE Injector Pump Fuel Return Riser (Used Bosch Part)
  ROT130107JJ Pump Roller Assembly
  068130149B 1.6 Diesel Injector Pump Rear Mounting Bracket (Used OEM Part)
  1460324332 35mmThrottle Shaft Bushing
  028130149B TDI Injector Pump Rear Mounting Bracket (Used OEM Part)
  Front Seal for 1.6 1.9 Injector Pump
  273 Delivery Valve
  VP37 Injector Pump Wire Harness Seals (Removed from Pump)
  ROT000107 Siphon Pump
  ALH Injector Pump Side Seals (ROT130743)
  8mm - 8mm Injector Pump Fuel Enrichment Screw - Number 40
  059130329 Hose
  1 460 210 347 Bosch VE Injector Pump LDA Gasket (OEM Bosch Part)
  068130139 Injector Pump Start/Stop Solenoid O-Ring
  3mm Camplate Shim
  N0127061 1.6 injector pump Woodruff Key
  N0210715 Used Banjo Bolt (OEM Part)
  ROT145716D Nipple Fitting Banjo Bolt Copper Washers
  Front Seal for TDI Injector Pump
  ROT198051A TDI Injector Pump Timing Cover Gasket Set
  2460210012 Injector Pump Rear Seal / O-Ring
  TDI Injector Pump Shaft to Feedpump Woodruff Key
  N0110212 TDI Injector Pump Shaft Nut with Lock Washer