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water hose Genuine Porsche part 99110664981

Code: 99110664981

Genuine Porsche part

water hose

The product code 99110664981 was also found on these diagrams

105-020 - coolant hose

Cooler for coolant - Center, PR:153 - 991 R/GT3/RS 2014-21

1.1-22 - coolant hose left

Side mounted radiators 911 (991) GT3 CUP 2016

Additional information:

• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.

Before purchasing thoroughly check part to confirm compatibility.

Related products

3 3 3

Radiator bottom return hose, short. Porsche 991 Carrera / 981 Boxster / 981C Cayman

99110662

Product Information

OE Match short radiator bottom return hose, left- and right-hand references identify the corresponding hose positions.

Fits

Porsche 991.1 Carrera 2012-16
Porsche 981 Boxster 2012-16
Porsche 981SP Boxster Spyder 2016
Porsche 981C Cayman 2014-16
Porsche 981 Cayman GT4 2016

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

Diagram ref no 9

What This Product Does

This short hose forms the radiator's lower return connection within the coolant circuit. It carries returning coolant through the radiator-section pipework; it is distinct from the longer supply hoses shown in the assembly diagrams.

Functions

Provides a passage for returning coolant.
Connects the radiator return section to adjoining coolant pipework.
Accommodates movement at the hose connection.

Technical Details

Component: short coolant radiator bottom return hose.
Left-hand reference: 99110662502.
Right-hand reference: 99110662602.
Brand: OE Match.
Diagram positions vary by application; match the reference to the required side.

Symptoms of Fault

Coolant pooling beneath the front or collecting on the undertray.
Damp connections, staining or dried deposits around hose ends.
A sweet odour accompanied by falling coolant level.
Cracked, swollen or softened hose sections.
Low-coolant warnings, gurgling or increased engine temperature.

Why Replacement Matters

Renewing a deteriorated or leaking return hose addresses coolant loss at that connection. Inspect adjoining fittings, seals and retaining hardware during the repair, since an unresolved connection fault can cause further seepage. OE Match's Porsche-focused replacement programme uses application and original-reference checks to identify suitable components.

FAQs

How do I select the correct side?
Match the original reference and diagram position: 99110662502 identifies the left hose; 99110662602 identifies the right hose.

Does front-end coolant leakage confirm hose failure?
No. Inspect the radiator and neighbouring joints too; a cooling-system pressure test can help locate the source.

Why might a leak appear intermittently?
Seepage can become apparent only as coolant temperature and system pressure increase.

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

99110662

99110662502

99110662602

The product you are viewing cross references to these numbers

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

99110662

Product Information

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

99110662202

99110662102

The product you are viewing cross references to these numbers

3 3 3

Coolant Hose for Centre Radiator. Porsche 991.1 GT3 / RS 2014-18

99110664

Product Information

Replacement coolant hose - connects to centre radiator
This radiator coolant hose forms part of the high-performance engine cooling system, helping circulate coolant through the front centre radiator to maintain stable engine operating temperatures. Designed for the first-generation 991 GT cooling arrangement, it provides a replacement for cracked, leaking or deteriorated original radiator hoses. Available separately for the left or right side.

Fits:
Porsche 991.1 GT3 / GT3 RS / R 2014-18

*Please be advised, this part is only compatible with first generation GT3 / GT3 RS models. If you have a second generation GT3 or GT3 RS, or a 991 GT3 Touring or Speedster, you must order 99110664991 and/or (LEFT) 99110664891 (RIGHT).

Diagram ref no 6 and 7

What This Part Does

The centre radiator helps dissipate heat from the engine coolant, particularly during demanding driving conditions.

These hoses connect the centre radiator to the surrounding coolant pipework, allowing coolant to circulate through the cooling circuit.

A damaged hose can cause coolant leakage, pressure loss and reduced cooling efficiency.

Replacing a worn hose helps maintain reliable coolant circulation and protect the engine against overheating.

Common Reasons for Replacement

Coolant leaking from a radiator hose connection.
Cracked, split or deteriorated hose.
Low coolant warning.
Dried coolant residue around the front radiator.
Hose damage caused by road debris or impact.
Cooling system pressure loss.
Radiator replacement or cooling system refurbishment.
Preventative maintenance on a track-used vehicle.

Where It Fits on the Car

The hose is fitted within the front centre radiator assembly, behind the front bumper. Separate left-hand and right-hand hoses connect to the centre radiator and associated coolant pipework.

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

99110664

99110664981

99110664881

The product you are viewing cross references to these numbers

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water hose Genuine Porsche part 99110664981