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Coolant Bottles / Expansion Tanks
By OE Match
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Maintain accurate coolant level monitoring and dependable cooling-system warnings with this OE MATCH Coolant Bottle Level Sensor. Designed for compatible Porsche applications, this sensor monitors the coolant level within the expansion/header tank and provides the vehicle's electronic systems with information when the coolant falls below the intended level.
Fits:
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Diagram Ref No 2
Maintaining sufficient coolant is essential for controlling engine temperature. A low coolant level can reduce the cooling system's ability to transfer heat effectively and may allow air to enter the system, potentially resulting in unstable temperatures or overheating.
The coolant level sensor provides an important early warning so that coolant loss can be investigated before it develops into a more serious cooling-system problem. Over time, the sensor can become unreliable through age, repeated heat cycles, contamination, electrical faults or damage to its connector and wiring.
What This Product Does:
- Monitors coolant level within the expansion/header tank.
- Detects when coolant falls below the intended level.
- Sends coolant level information to the vehicle's monitoring system.
- Helps trigger a low coolant warning when required.
- Provides early indication of coolant loss.
- Helps the driver identify a potential cooling-system problem.
- Supports reliable engine temperature management.
- Helps prevent low coolant conditions from going unnoticed.
- Works as part of the vehicle's cooling-system warning arrangement.
- Replaces a damaged, inaccurate or failed coolant level sensor.
- Restores correct coolant level monitoring on compatible Porsche applications.
Symptoms Of Wear Or Failure:
- Low coolant warning despite the coolant being at the correct level.
- Coolant warning appearing intermittently.
- Warning remaining illuminated after the coolant level has been corrected.
- No low coolant warning when the level is genuinely low.
- Implausible coolant level information during diagnostic testing.
- Coolant level sensor-related fault codes where applicable.
- Warning appearing particularly when cornering or accelerating despite adequate coolant.
- Corroded or contaminated electrical connections.
- Damaged sensor wiring.
- Cracked or damaged electrical connector.
- Physical deterioration of the sensor.
- Sensor problems discovered during expansion tank servicing or replacement.
Why Replacement Matters:
- The coolant level sensor provides an important warning when the cooling system begins losing coolant. A faulty sensor can create problems in two different ways.
- If the sensor incorrectly reports a low level, it may produce persistent or intermittent dashboard warnings even when the cooling system is correctly filled.
- More importantly, a sensor that fails to detect an actual low coolant condition can prevent the driver from receiving an early warning.
- Coolant loss may result from a leaking hose, radiator, expansion tank, water pump, seal or another cooling-system component. Continuing to drive with insufficient coolant can lead to poor circulation, air entering the cooling circuit and eventual engine overheating.
- Severe overheating can cause expensive engine damage, including deterioration of seals and gaskets and damage to major engine components.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98764150300
The product you are viewing cross references to these numbers
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Fits:
Porsche 987 Boxster 2.7L Boxster S 3.4L 2007-08 Chassis no F988U7 02382>> and F988U7 22205>>
Porsche 987 Boxster 2.9L / Boxster S 3.4L 2009-12
Porsche 987C Cayman 2.7L / Cayman S 3.4L 2006-08 Chassis no F988U7 52756>> and F988U7 72799>>
Porsche 987C Cayman 2.9L / Cayman S 3.4L 2009-12
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98710604703
The product you are viewing cross references to these numbers
OEMatch Coolant Bottles and Expansion Tanks — Durability, Sealing, Performance
Coolant bottles and expansion tanks store excess coolant and manage pressure as the engine heats and cools, maintaining system volume on Porsche models. Many owners search for genuine or OEM coolant bottles and expansion tanks; these are direct-fit alternatives designed to match the original form, fit and function. Replacing a degraded tank reduces the risk of coolant loss and overheating.
- Replacement plastic reservoirs for standard cooling systems
- Pressurised expansion tanks with integrated sensor mounting
- Pressure caps and remote overflow tanks
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche's original coolant bottles and expansion tanks. OE (Original Equipment) refers to parts matching original specifications for the coolant bottles and expansion tanks and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM coolant bottles and expansion tanks engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models. OEMatch supplies a wide range of Porsche parts, from gaskets to suspension hardware, engine items and interior trim. The company has catalogued over 4,000 part numbers and more than 8,700 OE cross-references, and continues to expand its Porsche-focused range.
- Restored coolant capacity and stable system pressure
- Reduced risk of leaks and overheating
- Improved reliability and easier level monitoring
- Plastic fatigue or cracking from thermal cycling
- Leaks at seams, hose connections or caps
- Faulty pressure caps or contamination within the cooling system
A compromised expansion tank can cause rapid coolant loss, pressure instability and overheating, which in turn may lead to engine damage. Timely replacement restores system integrity, helps maintain correct pressure and coolant level, and supports consistent engine operating temperatures on Porsche vehicles.
- Direct replacement options made to original-spec dimensions and tolerances
- Compatible mounting points and sensor interfaces where applicable
- Material choices intended to resist heat, pressure and vibration
Support & Advice
These items affect safety-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified.
