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99660620303/1
Product Information
Product Information

Engine oil pressure sender / switch
Mounted on the cylinder head, this component monitors pressure within the engine lubrication system and supplies the corresponding signal for the dashboard oil-pressure display and warning system.

Fits:
Porsche 996 Carrera 3.4L / 3.6L 1998 - 2005
Porsche 997 Carrera 3.6L / 3.8L 2005 - 2008

Diagram Ref No 32.  (Cylinder Head)


Functions

  • Monitors engine oil pressure
  • Provides information to the dashboard pressure gauge
  • Supports the low oil-pressure warning system
  • Helps identify potentially unsafe lubrication conditions


Technical Details

  • Brand: OE Match
  • Porsche cross-reference: 99660620303
  • Installation position: cylinder head
  • Diagram location: cylinder head, reference number 32


Symptoms of Fault

  • Oil-pressure gauge readings that fluctuate unexpectedly
  • Gauge momentarily dropping to zero before recovering
  • Warning light flickering at idle despite the correct oil level
  • Pressure display remaining unusually high or low
  • Intermittent readings associated with heat or vibration
  • Oil seepage around the sender body or connection


Why Replacement Matters

A defective sender may produce inaccurate readings or false dashboard warnings. However, low oil pressure can also indicate a genuine lubrication fault, so the engine oil level and actual pressure should be checked before the sender is assumed to be the cause. A mechanical pressure test is the preferred method of confirming the engine's true oil pressure.


FAQs

  • Does a flickering oil warning always mean the sender has failed?
    No. Treat any oil-pressure warning as genuine until the oil level and actual pressure have been checked.
  • How can the sender be diagnosed?
    Inspect the electrical connection and wiring, then compare the displayed reading with a mechanical oil-pressure gauge.
  • Should a leaking sender be replaced?
    Yes. Seepage from the sender body or seal can worsen and allow oil to contaminate nearby components.


Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99660620303
99660620302
99660620300
99660620301
99660620303

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