Radiator top coolant hose, long feed. Porsche 991 / 981 Boxster / 981C Cayman  ›  99110662

OE Match long-feed radiator top coolant hose, confirm the required side before ordering.

Fits

• Porsche 991 Carrera 2012-16
• Porsche 981 Boxster 2012-16
• Boxster 981 2.7L 2012–16
  
• Porsche 981 Boxster Spyder 2016
  
• Porsche 981C Cayman 2014-16
  
• Porsche 981C Cayman GT4 2016
  
  

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

Diagram ref no 10

What This Product Does

This hose carries coolant along the radiator supply connection. It forms part of the circuit linking the radiator with the vehicle’s cooling pipework; it is the long feed version, rather than the short return hose.

Functions

• Provides a passage for coolant at the radiator feed connection.
• Connects the relevant radiator inlet to the adjoining coolant pipework.
• Accommodates movement at the flexible connection.
  
  

Technical Details

• Brand: OE Match.
• Configuration: long radiator supply hose, top connection.
• Left version reference: 99110662102.
• Right version reference: 99110662202.
• Diagram positions vary by application; match the reference and side rather than relying on the item number alone.
  
  

Symptoms of Fault

• Coolant collecting beneath the vehicle’s front end.
• Moisture or dried deposits at hose connections.
• A falling coolant level or dashboard level alert.
• A sweet odour near the radiator pipework.
• Cracks, bulging or unusually soft hose sections.
• Higher temperature readings or escaping steam.
  
  

Why Replacement Matters

A leaking or deteriorated feed hose can allow coolant to escape. Renewing a confirmed faulty hose addresses that source of fluid loss. Check adjacent fittings, clips and sealing surfaces during the repair, since damage elsewhere can cause leakage to recur. OE Match develops replacement components around Porsche applications, with reference matching and fitment assessment forming part of its product evaluation.

FAQs

How can I distinguish a hose leak from a radiator leak?
Inspect the hose ends alongside the radiator joints and end tanks. A cooling-system pressure test can help locate the source.

Why does leakage sometimes appear only after a journey?
A marginal connection may seep only while the cooling circuit is hot and pressurised.

Should the retaining hardware also be checked?
Yes. Inspect clips, clamps and adjoining fittings, replacing damaged or unsuitable components as required.

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

99110662

The product you are viewing cross references to these numbers