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- Porsche 971.1 Panamera V6 3.0L 2WD (330 Hp) 2017-20
- Porsche 971.1 Panamera 4 V6 3.0L 4WD (330 Hp) 2017-20
- Porsche 971.1 Panamera 4 V6 3.0L 4WD Executive 2017-20
OE Match coolant radiator.
Fits
Porsche 971.1 Panamera 3.0L 2017 - 2021
* with 'Standard' equipment (option code: A8C)
* without alternative drive system (option code: 0K0)
Check fitment for your specific vehicle (model, year, engine) before ordering.
What This Product Does
Heated coolant passes through the radiator, where its heat is released into the surrounding airflow. The cooled fluid then circulates back through the engine. Cooling fans assist airflow when needed, while the radiator forms part of the system that controls operating temperature.
Functions
- Releases heat carried by circulating coolant.
- Helps control engine operating temperature.
- Returns cooled fluid to the engine cooling circuit.
Technical Details
- Product type: engine coolant radiator / coolant cooler.
- Brand: OE Match.
- Supplied reference numbers: 9A712125310 and PAE121253A.
- Application requirements: equipment code A8C and drive-system code 0K0.
Symptoms of Fault
- Temperature climbing during demanding driving or warm weather.
- Falling coolant level, damp radiator surfaces or puddles beneath the vehicle.
- Sweet odour or dried deposits near radiator seams.
- Discoloured coolant containing corrosion residue or debris.
- Dashboard warning indicating excessive engine temperature.
- Weak cabin heating when coolant is low or circulation is impaired.
- Steam beneath the bonnet associated with escaping or boiling coolant.
- Damaged fins, visible corrosion or gurgling following shutdown.
Why Replacement Matters
Leaks and restricted coolant passages can reduce the radiator's ability to remove heat. Prolonged overheating may damage cylinder heads and gaskets, affect engine oil and lead to further repairs. Renewing a radiator with confirmed damage addresses the faulty component rather than repeatedly topping up lost coolant.
Inspect nearby hoses, joints, seals and mounting hardware during the repair. Similar symptoms can arise elsewhere in the cooling circuit, so establish the source before replacing parts.
FAQs
How can a radiator leak be distinguished from a hose leak?
Look for moisture or deposits on the radiator core and seams, then inspect hose connections. A cooling-system pressure test can help locate the source.
Can overheating occur without a visible leak?
Yes. Deposits inside coolant passages can restrict circulation without producing external seepage. Fan operation and thermostat behaviour also need checking.
What else should be inspected during replacement?
Check the pressure cap, thermostat, hoses and connections. Renew supporting components where inspection identifies deterioration rather than assuming every item needs replacement.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PAE121253A
The product you are viewing cross references to these numbers
- Porsche 9YA Cayenne E-Hybrid V6 3.0L V6 (340Hp) 2018-23
- Porsche 9YA Cayenne Coupe E-Hybrid V6 3.0L (340Hp) 2020-23
- Porsche 9YA Cayenne Turbo S E-Hybrid V8 4.0L (550Hp) 2019-23
- Porsche 9YA Cayenne Coupe Turbo S E-Hybrid V8 4.0L (550Hp) 2020-23
- Porsche 9YA.2 Cayenne E-Hybrid V6 3.0L (470Hp) 2023>>
- Porsche 9YA.2 Cayenne E-Hybrid Coupe V6 3.0L (470Hp) 2023>>
- Porsche 9YA.2 Cayenne S E-Hybrid V6 3.0L (519Hp) 2023>>
- Porsche 9YA.2 Cayenne S E-Hybrid Coupe V6 3.0L (519Hp) 2023>>
- Porsche 9YA.2 Cayenne GTS V8 4.0L Bi-Turbo Petrol 2023>>
- Porsche 9YA.2 Cayenne GTS Coupe V8 4.0L Bi-Turbo 2023>>
The Porsche Genuine OE Additional Center Coolant Radiator (PAB145804) is a specific auxiliary cooling component designed to manage excess heat in hybrid-assisted Cayenne 9YA models. It enhances the ability of the cooling system to regulate coolant temperature during heavy engine load or hybrid system operation - contributing to efficient engine performance and longevity through improved thermal management.
Fits:
Porsche 9YA (E3) Cayenne 3.0L / 4.0L Hybrid 2018 - 2024
Porsche 9YA.2 (E3 PA) Cayenne 3.0L Hybrid 2023 >>
Diagram ref no 1
This additional center coolant radiator functions as a supplementary heat exchanger in the engine’s cooling system. It helps dissipate excess heat from the engine coolant, reducing overall operating temperature and relieving load on the primary radiator - particularly under higher thermal loads seen in hybrid-assisted or high-performance operation. By improving coolant temperature control, it supports optimal combustion efficiency, long-term durability, and consistent engine performance.
Applications
• Cooling system repair: Replace a damaged or failed auxiliary radiator component
• Performance reliability: Add or restore cooling capacity to support hybrid engine thermal loads
• Factory-standard restoration: Use when rebuilding or fully servicing cooling circuits
• Preventative maintenance: Install as part of coolant system servicing for consistent temperature control
Fitment / Position on Car
• Installed on: Engine bay, mounted centrally as part of the coolant heat-exchange system
• Location: Integrated with front cooling network alongside main radiator cores and intercoolers
• Connection: Works within the standard coolant piping and hose routing for the Cayenne 9YA hybrid platform
Modern performance and hybrid engines, such as those found in the Cayenne 9YA, generate additional heat due to electric motor assist, turbocharging, and high output demands. An auxiliary radiator increases total cooling surface area, helping prevent overheating, reduce thermal stress on primary components, and maintain consistent performance both in everyday driving and demanding conditions. Choosing a genuine Porsche OE cooling radiator means getting the exact specification, durability, and fitment that Porsche engineers designed for your vehicle’s thermal system
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PAB145804
The product you are viewing cross references to these numbers
- Porsche 9YA Cayenne E-Hybrid V6 3.0L V6 (340Hp) 2018-23
- Porsche 9YA Cayenne Coupe E-Hybrid V6 3.0L (340Hp) 2020-23
- Porsche 9YA Cayenne Turbo S E-Hybrid V8 4.0L (550Hp) 2019-23
- Porsche 9YA Cayenne Coupe Turbo S E-Hybrid V8 4.0L (550Hp) 2020-23
- Porsche 9YA.2 Cayenne E-Hybrid V6 3.0L (470Hp) 2023>>
- Porsche 9YA.2 Cayenne E-Hybrid Coupe V6 3.0L (470Hp) 2023>>
- Porsche 9YA.2 Cayenne S E-Hybrid V6 3.0L (519Hp) 2023>>
- Porsche 9YA.2 Cayenne S E-Hybrid Coupe V6 3.0L (519Hp) 2023>>
- Porsche 9YA.2 Cayenne GTS V8 4.0L Bi-Turbo Petrol 2023>>
- Porsche 9YA.2 Cayenne GTS Coupe V8 4.0L Bi-Turbo 2023>>
This radiator is designed for direct-fit installation using existing mounting points and coolant hoses, without modification. It is ideal for replacement during cooling system servicing, radiator upgrades, or when a worn or damaged unit is affecting system performance.
Fits:
Porsche 9YA (E3) Cayenne 3.0L / 4.0L Hybrid 2018 - 2024
Porsche 9YA.2 (E3 PA) Cayenne 3.0L Hybrid 2023 >>
Diagram ref no 1
The additional centre coolant radiator increases the total heat rejection capacity of the cooling system. By providing supplementary heat dissipation ahead of or in conjunction with the main radiator, it helps:
• Maintain consistent operating temperatures under heavy load or high ambient heat
• Improve thermal stability for engine and hybrid components
• Reduce strain on the primary radiator and cooling fans
• Support extended performance driving or high-duty cycles
An inefficient or failing additional radiator can reduce the cooling system’s ability to control engine temperature, leading to overheating, reduced performance, and increased stress on the main radiator. On hybrid models, inadequate thermal management can also impact electrified components. Replacing a compromised unit with an OE Match radiator restores correct cooling capacity and helps maintain performance, reliability, and long-term engine health.
When to replace:
• Visible damage, bent fins, or leaks
• Coolant stains or corrosion on the radiator cores
• Overheating or rising temperature gauges
• After front-end impact/collision damage
• During complete cooling system overhaul
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PAB145804
The product you are viewing cross references to these numbers