28 Electrical parts are listed for the 2021 Infiniti Q50, in 6 part types, covering both the 3.0L V6 Turbocharged and the 3.5L V6 ELECTRIC/GAS. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2021 Infiniti Q50, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. 20 parts of the 28 listed are Alternator / Generator (10 parts), Speed Sensor (5 parts) and Starter Motor (5 parts). The other 3 part types cover the remaining 8 parts.
The 2021 Infiniti Q50 was sold with both the 3.0L V6 Turbocharged and the 3.5L V6 ELECTRIC/GAS. 7 parts fit every engine; the other 21 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2021 Infiniti Q50 electrical parts are WAI GLOBAL (3 parts), PURE ENERGY (3 parts) and STANDARD MOTOR PRODUCTS (3 parts), plus 13 more brands. Quality grades include Remanufactured, New and Economy.
4 parts on this 2021 Infiniti Q50 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including ULTRA-POWER 11877N (Alternator / Generator) and ULTRA-POWER SC615 (Speed Sensor). Click any part number to see every vehicle that part fits.
Alternator / Generator
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ULTRA-POWER Popular Fits: 3.0L V6 Turbocharged | 11877N | 🇺🇸 US 🇨🇦 CA | 150 AmpsRed Sport 400 | View on Amazon |
| WAI GLOBAL Popular Fits: 3.0L V6 Turbocharged | 21100N | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Red Sport 400 or Red Sport I-Line or Red Sport I-Line ProACTIVE or Sport Plus170 Amps Unit | View on Amazon |
| WAI GLOBAL Fits: 3.0L V6 Turbocharged | 11877N | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Red Sport 400 or Red Sport I-Line or Red Sport I-Line ProACTIVE or Sport Plus150 Amps Unit | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: 3.0L V6 Turbocharged | 15073 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| PURE ENERGY Fits: 3.0L V6 Turbocharged | 15073 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| PURE ENERGY Fits: 3.0L V6 Turbocharged | 15013 | 🇺🇸 US | Remanufactured | View on Amazon |
| REMY Fits: 3.0L V6 Turbocharged | 11305 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | View on Amazon |
| REMY Fits: 3.0L V6 Turbocharged | 11304 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | View on Amazon |
| TERREPOWER Fits: 3.0L V6 Turbocharged | 42162 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | View on Amazon |
| TERREPOWER Fits: 3.0L V6 Turbocharged | 42163 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | View on Amazon |
This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator.
10 Alternator / Generator parts are listed for the 2021 Infiniti Q50, from WAI GLOBAL, PURE ENERGY, REMY and 3 other brands. ULTRA-POWER 11877N carries the "Popular" badge.
In the New grade, WAI GLOBAL and ULTRA-POWER supply 3 parts: brand-new units rather than rebuilt ones. A representative part number is ULTRA-POWER 11877N.
In the Remanufactured grade, PURE ENERGY, REMY, TERREPOWER and 1 other brand supply 7 parts: factory-rebuilt units with new wear components. A representative part number is FVP 15073.
Battery
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH Fits: 3.0L V6 Turbocharged | S6523B | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AGMAGM | View on Amazon |
| DEKA Fits: 3.0L V6 Turbocharged | 9A3585 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IntimidatorAGM | View on Amazon |
| EXIDE Fits: 3.0L V6 Turbocharged | MX35 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Marathon MaxBCI Group 35 | View on Amazon |
This table covers the batteries listed by group size and specification. Typical signs include slow cranking, a battery lamp, or a no-start after the vehicle sat overnight. Confirm group size and terminal layout in the notes. Clean the posts and the ground before condemning the battery.
3 Battery parts for the 2021 Infiniti Q50 come from 3 brands — BOSCH, DEKA and EXIDE.
This group includes BOSCH S6523B, DEKA 9A3585 and EXIDE MX35.
Parking Aid Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Q50 engines | PPS142 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Black | View on Amazon |
| TECHPRO Fits: all 2021 Q50 engines | IN1075101 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Customer Paints to Match | View on Amazon |
| TECHPRO Fits: all 2021 Q50 engines | IN1075104 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | FrontInner | View on Amazon |
| VARIOUS MFR Fits: all 2021 Q50 engines | IN1075101 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Customer Paints to Match | View on Amazon |
This table covers the ultrasonic park-aid sensors in the bumper. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
4 Parking Aid Sensor parts are listed for the 2021 Infiniti Q50, from TECHPRO, STANDARD MOTOR PRODUCTS and VARIOUS MFR. All of them fit every engine offered in the 2021 Q50.
Part numbers include STANDARD MOTOR PRODUCTS PPS142, TECHPRO IN1075101 and TECHPRO IN1075104, among others listed above.
Parking Aid Sensor Bracket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TECHPRO Fits: all 2021 Q50 engines | NI1076100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Front Right | View on Amazon |
This table covers the brackets that mount the Parking Aid Sensor. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners.
One part is listed for the 2021 Infiniti Q50 — TECHPRO NI1076100.
Speed Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ULTRA-POWER Popular Fits: 3.0L V6 Turbocharged | SC615 | 🇺🇸 US 🇨🇦 CA | Fits Vehicle Speedwith Manual trans.or Vehicle Speed | View on Amazon |
| HOLSTEIN Fits: 3.0L V6 Turbocharged | 2VSS0086 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Vehicle Speed | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 Q50 engines | SC615T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-Series | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DELPHI Fits: 3.0L V6 Turbocharged | SS12249 | 🇺🇸 US 🇨🇦 CA | Transmission Revolution Sensor | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 Q50 engines | SC615 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Vehicle Speedor Transmission SpeedInput | View on Amazon |
This table covers the speed sensors on the transmission, transfer case or ABS ring. Typical signs include a dead speedometer, harsh transmission shifts, or a code for vehicle speed. Inspect the tone wheel and the connector before replacing the sensor.
5 Speed Sensor parts for the 2021 Infiniti Q50 come from 4 brands — STANDARD MOTOR PRODUCTS, ULTRA-POWER, HOLSTEIN and 1 other brand. The "Popular" part is ULTRA-POWER SC615. 2 parts fit every engine; the other 3 are engine-specific.
The Economy section lists 3 options from ULTRA-POWER, HOLSTEIN and STANDARD MOTOR PRODUCTS — the catalog's value-priced group. ULTRA-POWER SC615 is listed in this group.
In the Standard Replacement grade, DELPHI and STANDARD MOTOR PRODUCTS supply 2 parts: built to original-equipment specification. A representative part number is DELPHI SS12249.
Part numbers include ULTRA-POWER SC615, HOLSTEIN 2VSS0086 and STANDARD MOTOR PRODUCTS SC615T, among others listed above.
Starter Motor
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TYC Popular Fits: 3.0L V6 Turbocharged | 117934 | 🇺🇸 US 🇨🇦 CA | Luxe Model or Pure Model or Red Sport 400 or Sensory or Signature Edition | View on Amazon |
| WAI GLOBAL Fits: 3.0L V6 Turbocharged | 17934N | 🇺🇸 US 🇲🇽 MX | RWDEngine VIN F | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: 3.0L V6 Turbocharged | 3362155 | 🇺🇸 US 🇨🇦 CA | GoldRemanufactured | View on Amazon |
| FVP Fits: 3.0L V6 Turbocharged | 16022 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| PURE ENERGY Fits: 3.0L V6 Turbocharged | 16022 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
This table covers the starter motors that crank the engine. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor.
5 Starter Motor parts are listed for the 2021 Infiniti Q50, from TYC, WAI GLOBAL, ACDELCO and 2 other brands. TYC 117934 carries the "Popular" badge.
New: 2 parts, from TYC and WAI GLOBAL. A representative part number is TYC 117934.
Remanufactured: 3 parts, from ACDELCO, FVP and PURE ENERGY. A representative part number is ACDELCO 3362155.
This group includes TYC 117934, WAI GLOBAL 17934N and ACDELCO 3362155 and the remaining parts above.
Buying Electrical Parts for a 2021 Infiniti Q50
On this vehicle, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.
- Match the engine first. Some electrical parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, clean or renew the battery terminals and grounds with any charging-system repair.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Alternator / Generator and Speed Sensor .
Frequently Asked Questions
How many electrical parts fit the 2021 Infiniti Q50?
Our catalog currently lists 28 electrical parts for the 2021 Infiniti Q50 across 6 subcategories and 16 brands, covering both the 3.0L V6 Turbocharged and the 3.5L V6 ELECTRIC/GAS. Each part is matched to the engine(s) it fits.
Do electrical parts differ between 2021 Infiniti Q50 engines?
Some do. 7 parts fit every engine; the other 21 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical problems on a 2021 Infiniti Q50?
Common symptoms include slow cranking on cold mornings, a battery light that flickers, dim lights at idle, or a check-engine code pointing at a sensor circuit. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, clean or renew the battery terminals and grounds with any charging-system repair.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 Infiniti Q50 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2021 Infiniti Q50?
First match the engine — each row shows which engine(s) the part fits. Then test before replacing — a failed alternator and a bad ground can look identical, and sensors are frequently condemned for wiring faults. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Infiniti Q50
Electrical Parts for Other Infiniti Q50 Years
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