Differential output shaft seal. Porsche 924 / 944 / Boxster / Cayman 45 x 60 x 8mm › 016409399B

OE Match differential output shaft seal for selected Porsche 924, 944, Boxster and Cayman manual-transmission applications. The supplied diagram specification is 45 x 60 x 8mm.

Fits
For cars with manual transmission

• Porsche Boxster 986 2.5L 1997-99
• Porsche Boxster 986 2.7L 1999-02
• Porsche Boxster S 986 3.2L 1999-02
• Porsche Boxster 986 2.7L 2003-04
• Porsche Boxster S 986 3.2L 2003-04
• Porsche Boxster 987 2.7L 2005-08/08
• Porsche Boxster 987 S 3.2/3.4L 2005-08/08
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 2.7L 8V 1988-89
• Porsche 944S 2.5L 16V 1987-88
• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 944 Turbo S 2.5L 8V 1988
• Porsche Cayman S 3.4L 987C 2005-08
• Porsche Cayman 2.7L 987C 2006-08
• Porsche 924 2.0L 1976-79
• Porsche 924 2.0L 1980-85
• Porsche 924 Turbo 2.0L 1979-81
• Porsche 924 Turbo 2.0L 1982-84
• Porsche 924 Carrera GT 2.0L 1981
• Porsche 924 Carrera GTS 2.0L 1982
• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Boxster S 987 MKII 3.4L 2009-12
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12
• Porsche Boxster 981 2.7L 2012-16
• Porsche Boxster 981 S / GTS 3.4L 2012-16
• Porsche Cayman 2.7L 981 2013-16
• Porsche Cayman S / GTS 3.4L 981 2013-16
• Porsche Cayman GT4 3.8L 2015-16
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• Porsche Cayman 718 2.0L Manual (300 Bhp)
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• Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
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• Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp)

Diagram Ref No 4

What This Product Does
This radial seal retains lubricant where the differential output shaft passes through its housing, forming a sealing interface around the rotating shaft.

Functions

• Limits lubricant escape at the differential output.
• Seals the interface between the shaft and housing.

Technical Details

• Part reference: 016409399B; radial shaft seal, 45 x 60 x 8mm.
• 986 Boxster diagram applications: G86.00 M481 five-speed manual, 1997–04; differential G86.00/01, 1997–04.
• 987 Boxster diagram applications: G87.01 I481 five-speed manual, 2005–08; Boxster S G87.20 I480 six-speed manual, 2007–08.
• 987C.1 Cayman diagram applications: G8701+ PR:481 five-speed manual, 2.7L 2006–08; differential application, 2.7L 2007–08.
• 987C.1 Cayman six-speed manual diagram application: G8720,G8721+ PR:480, 2006–08.
• Specified diagram quantities: two seals in the 986 and 987 differential assemblies and the listed 987 Boxster S and 987C.1 six-speed transmission assemblies. This is an assembly requirement, not a statement of pack contents.

Symptoms of Fault

• Oily deposits around the differential output flange.
• Lubricant seepage or drops beneath the transmission.
• A recurring leak associated with a hardened or damaged seal.

Why Replacement Matters

Renewing a leaking output seal addresses lubricant loss at this location. Inspect the shaft sealing surface and surrounding components during the repair, as damage or wear elsewhere can contribute to repeat leakage.

FAQs

• Will this seal resolve every transmission leak?
  No. Establish where the lubricant is escaping before selecting a replacement.
• Should sealant be added?
  Use additional sealing compounds only when required by the relevant workshop procedure.
• Does a matching model name confirm compatibility?
  No. Cross-check reference 016409399B, the gearbox identification and the manual-transmission restriction before fitting.