Coolant supply hose, Right. Porsche 987 Boxster / 987C Cayman / 997  ›  99710662703

OE Match right-hand coolant supply hose 

Fits

• Porsche 987 Boxster 2005-08
• Porsche 987C Cayman 2006-08
• Porsche 987.2 Boxster 2009-12
• Porsche 987C.2 Cayman 2009-12
• Porsche 997.1 Carrera 2005-08
• Porsche 997.1 Turbo / GT3 2007-08

• Porsche 997.2 Carrera 2009-12

• Porsche 997.2 Turbo / GT3 2009-13
  
  

Check fitment for your specific vehicle (model, year, engine) before ordering.

Diagram ref: 30

What This Product Does

This hose carries coolant within the supply side of the cooling circuit. Its flexible connection accommodates movement between adjoining components while containing coolant under normal system pressure.

Functions

• Provides the right-hand coolant supply connection.
• Transfers coolant between connected cooling-system components.
• Accommodates movement at the hose connection.

Technical Details

• Supplied part reference: 99710662703; brand: OE Match.
• Position: Right; circuit designation: supply.
  
  

Symptoms of Fault

• Falling coolant level or repeated low-level warnings.
• Damp hose connections, dried deposits or undertray staining.
• A sweet odour following use.
• Cracked, swollen, softened or visibly abraded hose sections.
• Gurgling noises or an increasing temperature reading.
  
  

Why Replacement Matters

Ageing or damaged hose connections can allow coolant to escape, potentially leading to overheating. Replace a confirmed defective hose and inspect neighbouring pipes, supports, seals and clips to identify related deterioration. OE Match develops replacement components around Porsche applications, using original references and specification checks to assess suitability.

FAQs

How should a suspected leak be checked?
A cooling-system pressure test can help locate seepage at hose ends and adjoining connections rather than relying on symptoms alone.

Why might coolant disappear without leaving a puddle?
Escaping fluid may collect on an undertray or evaporate, leaving deposits instead of an obvious puddle.

What should be checked when selecting this hose?
Compare reference 99710662703, the right-hand position and the vehicle-specific application. The diagram item number varies between models.

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Related, superseded, cross reference or alternative numbers for comparison.

99710662703

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