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Fuel pump relay. Porsche 986 Boxster / 996 / 996 Turbo 99661510100 ❭ 99661510100
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche Carrera GT 2003-06
The fuel pump relay is a precision replacement relay for the fuel-pump control circuit in the Porsche 986 Boxster and 996 911 (including Turbo and early Carrera GT) models. This relay controls the activation of the in-tank fuel pump, providing the necessary current to ensure correct fuel delivery under demand - making it vital for engine start-up, steady fuel pressure and safe operation.
Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 996 C2 / C4 / C4S 1998 - 2005
Porsche 996 Turbo 2001 - 2005
Porsche 996 GT3
Porsche Carrera GT 2004 - 2006
* Please check and match the part number of your relay in your car before ordering.
• Position: Mounted in the front luggage compartment fuse/relay panel or subsystems - controls power feed to the fuel pump relay circuit.
• Function: When the ignition is turned on or engine is running, the signal from ECU or shift lever energises this relay, sending current to the fuel pump so fuel pressure builds before engine cranking - crucial for proper fuel system operation.
• Applications: Ideal when the original relay has failed, is intermittent, shows corrosion on contacts, causes fuel-pump drop-outs, engine stumbling, or fails the self-check.
The fuel pump relay is a critical yet often overlooked part of the fuel delivery system.
A failing relay may manifest as:
• Engine cranks but won’t start (fuel pump never powers)
• Fuel pump prime is silent when ignition is turned on
• Engine stalls at random after start due to loss of pump voltage
• Intermittent “no-fuel pressure” faults or ECU logged errors
Replacing the relay with a correct unit ensures the fuel pump receives the proper current, realises full system pressure, and avoids mis-diagnosis of fuel pump or ECU faults.
When to replace:
• Original relay is over 10 years old, exposed to heat or aftermarket modifications
• You’ve installed a new fuel pump but issue persists (relay may be the culprit)
• You’re diagnosing no-start or stall symptoms that point to fuel pressure drop-out
• You’re restoring or prepping your vehicle and want to replace all wear-prone electrical relays
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99661510100
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- Porsche 958 Cayenne S V6 3.0L Hybrid (380Hp) 2010-17
- Porsche 9YA Cayenne V6 3.0L Petrol (340Hp) 2018-23
- Porsche 9YA Cayenne Coupe V6 3.0L Petrol (340Hp) 2019-23
- 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 S V6 2.9L Petrol (440Hp) 2018-23
- Porsche 9YA Cayenne Coupe S V6 2.9L Petrol (440Hp) 2019-23
- Porsche 9YA Cayenne Turbo V8 4.0L Petrol (550Hp) 2020-23
- Porsche 9YA Cayenne Coupe Turbo V8 4.0L Petrol (550Hp) 2019-23
- 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 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
- Porsche 971.1 Panamera 4 3.0L Turbocharged V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera 4S V6 3.0L 4WD (440 Hp) 2017-20
- Porsche 971.1 Panamera 4S V6 3.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera 4S 2.9L Twin-Turbo V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera 4 E-Hybrid V6 2.9L 4WD 2017-20
- Porsche 971.1 Panamera 4 E-Hybrid V6 2.9L 4WD Executive 2017-20
- Porsche 971.1 Panamera 4 E-Hybrid 2.9L Twin-Turbo V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD (550 Hp) 2017-20
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera Turbo 4.0L Twin-Turbo V8 Sport Turismo 2017-20
- Porsche 971.1 Panamera Turbo S E-Hybrid V8 4.0L 4WD 2017-20
- Porsche 971.1 Panamera Turbo S E-Hybrid V8 4.0L 4WD Executive 2017-20
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
- Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21
- Porsche 95B.2 Macan GTS Petrol 2.9L V6 (380Bhp) 2019-21
- Porsche 95B.2 Macan Turbo 2.9L V6 (440Bhp) 2019-21

Fits:
Porsche 958 Cayenne Hybrid (Option code: 2G1 / 2G3 / 2G4 / 2G7 / 2G8) 2011-18
Porsche 9YA Cayenne 2018>> (Option code: 2G1 / 2G4)
Porsche 9YA Cayenne HYBRID 2018>> (Option code: 2G1 / 2G4)
Porsche 95B Macan 2014-18 (Option code: 2G4)
Porsche 95B.2 Macan 2019>> (Option code: 2G4)
Porsche 971.1 Panamera 2017-21 (Option code: 2G1 / 2G4)
Porsche 971.1 Panamera HYBRID 2017-21 (Option code: 2G1 / 2G4)
Porsche 971.2 Panamera 2021>> (Option code: 2G1 / 2G4)
Porsche 971.2 Panamera HYBRID 2021>> (Option code: 2G1 / 2G4)
Option codes:
(2G1) - Insert for fuelling with unleaded petrol
(2G3) - Without insert for unleaded petrol
(2G4) - Insert for fuelling with unleaded petrol (CARB Diagnosis)
(2G7) - Insert for unleaded fuelling in bad fuel region
(2G8) - Insert for unleaded fuelling - MAPPS
Click 'Zoom in' for large parts diagram.
Diagram ref no 5
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- 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 S V6 2.9L Petrol (440Hp) 2018-23
- Porsche 9YA Cayenne Coupe S V6 2.9L Petrol (440Hp) 2019-23
- 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
- Porsche 971.1 Panamera 4 3.0L Turbocharged V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera 4S V6 3.0L 4WD (440 Hp) 2017-20
- Porsche 971.1 Panamera 4S V6 3.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera 4S 2.9L Twin-Turbo V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera 4 E-Hybrid V6 2.9L 4WD 2017-20
- Porsche 971.1 Panamera 4 E-Hybrid V6 2.9L 4WD Executive 2017-20
- Porsche 971.1 Panamera 4 E-Hybrid 2.9L Twin-Turbo V6 Sport Turismo 2017-20
- Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21

Porsche Cayenne (9YA) 2.9L / 3.0L 2018>>
Porsche 971 Panamera 2.9L / 3.0L 2018>>
Porsche 95B.2 Macan S 3.0L 2018>>
For cars with:
0GG - Emission compliance EU 4
7CE - Emissions concept LEV3/TIER3 70
7GH - EU4 emissions concept without EOBD
7MM - EU6 plus exhaust concept
7MW - Emissions concept EU6, Japan (Greentax)
0K3 - Hybrid propulsion system PHEV
0Y5 - Cold and tropical climate zone
Click 'Zoom in' for large parts diagram.
Diagram ref no 13
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- Porsche 957 Cayenne 3.6L 2007-10
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 958 Cayenne S V6 3.0L Hybrid (380Hp) 2010-17
- Porsche 9YA Cayenne S V6 2.9L Petrol (440Hp) 2018-23
- Porsche 9YA Cayenne Coupe S V6 2.9L Petrol (440Hp) 2019-23
- Porsche 970.1 Panamera S Hybrid V6 3.0L 2011-13
- Porsche 970.2 Panamera S E-Hybrid V6 3.0L (416Hp) 2014-16
- 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
- Porsche 971.1 Panamera 4 3.0L Turbocharged V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera 4S V6 3.0L 4WD (440 Hp) 2017-20
- Porsche 971.1 Panamera 4S V6 3.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera 4S 2.9L Twin-Turbo V6 Sport Turismo 2017-20
- Porsche 971.1 Panamera 4 E-Hybrid V6 2.9L 4WD 2017-20
- Porsche 971.1 Panamera 4 E-Hybrid V6 2.9L 4WD Executive 2017-20
- Porsche 971.1 Panamera 4 E-Hybrid 2.9L Twin-Turbo V6 Sport Turismo 2017-20
- Porsche 971.2 Panamera 2.9L V6 2021-23
- Porsche 971.2 Panamera 4 2.9L V6 2021-23
- Porsche 971.2 Panamera 4 Sport Turismo 2.9L V6 2021-23
- Porsche 971.2 Panamera 4S 2.9L V6 2021-23
- Porsche 971.2 Panamera 4S Sport Turismo 2.9L V6 2021-23
- Porsche 971.2 Panamera 4 E-Hybrid 2.9L V6 2021-23
- Porsche 971.2 Panamera 4 E-Hybrid Sport Turismo 2.9L V6 2021-23
- Porsche 971.2 Panamera 4S E-Hybrid 2.9L V6 2021-23
- Porsche 971.2 Panamera 4S E-Hybrid Sport Turismo 2.9L V6 2021-23
- Porsche 95B.1 Macan Petrol 2.0L (237Bhp) 2014-18
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
- Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21
- Porsche 95B.2 Macan GTS Petrol 2.9L V6 (380Bhp) 2019-21
- Porsche 95B.2 Macan Turbo 2.9L V6 (440Bhp) 2019-21

Fits:
Porsche 958.1 Macan 2.0ltr - 2014 to 2018
Porsche 958.2 Macan - 2019 to 2021
Porsche 957 Cayenne 3.6ltr - 2007 to 2010
Porsche 958 Cayenne 3.6ltr - 2017 to 2017
Porsche 958 Cayenne S Hybrid 3.0ltr - 2017 to 2017
Porsche 9YA Cayenne S 2.9ltr - 2018 to 2023
Porsche 970.1 Panamera S Hybrid - 2009 to 2013
Porsche 970.2 Panamera S E-Hybrid - 2014 to 2016
Porsche 971.1 Panamera 2.9ltr / 3.0ltr V6 - 2017 to 2020
Porsche 971.1 Panamera E-Hybrid - 2017 to 2020
Porsche 971.2 Panamera / 4 / 4S 2.9ltr V6 - 2021 to 2023
Porsche 971.2 Panamera 4 E-Hybrid - 2021 to 2023
Click 'Zoom in' for large parts diagram.
Diagram ref no 2
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WHT005184
The product you are viewing cross references to these numbers
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