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If your Infiniti Q50 struggles to start or shows intermittent crank issues, choosing the right starter motor can restore reliable engine starts and reduce roadside failures. This guide walks you through seven shortlisted starter motors selected for fitment and durability specifically for the Infiniti Q50.You will find clear explanations of the diagnostic signs we considered and practical buying criteria like build quality and ease of installation. Read on to see concise guidance on what matters when replacing the starter on an Infiniti Q50.
Looking for other parts? See all Infiniti Q50 parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | Premier Gear PG-17934 12V Starter for Infiniti/Nissan 3.0–3.7L |  |
| Best quality Built to a higher standard if you want something more solid | SZKAIDAG Starter Motor for Infiniti Q50/Q70/G37 and Nissan 370Z (23300-EY00E) |  |
| Best Value The sweet spot between price and what you get | MOAUTO Starter Motor 17934N Compatible with Infiniti Q50 (2014–2019) |  |
| Best budget The cheapest option that still gets the job done reliably | Ezexpreze Starter Motor compatible with Infiniti Q50 and Nissan 370Z |  |
| Highest Rated A top-rated pick with lots of positive feedback | Parts Player 12V Starter Compatible with Nissan/Infiniti 3.7L and 3.0L Engines |  |
| Most Popular A crowd favorite that many people choose with confidence | A-Premium Starter Motor Compatible with Nissan/INFINITI V6 12V 1.4KW 10T CW |  |
| Best Seller A high-volume bestseller chosen again and again | AOTPAT Starter Motor for Infiniti Q50/Q60/Q70 and Nissan 370Z (12V, 1.4 kW) |  |
1. Premier Gear PG-17934 12V Starter for Infiniti/Nissan 3.0–3.7L
| Amperage | 22 Amps |
|---|---|
| Voltage | 12 |
| Wattage | 1.6 KW |
| Model | 12V Rotation: CW 10 Tooth |
This Premier Gear PG-17934 is a direct-replacement 12V starter designed for Infiniti and Nissan V6 engines and intended to match factory fit and function. It is used the same way as a factory starter: mounts to the bellhousing, receives the battery signal, and cranks the engine; installation is typical for a dealer or independent mechanic and some DIYers. Notable features listed include 22 amps, 1.6 kW output and clockwise rotation with a 10-tooth pinion, and the unit is built from metal components. In practice the starter delivers a reliable crank and many owners report it restores quick starting on Q50 and related models at a fraction of dealer price. Practical benefits are lower cost versus factory parts, new components (not rebuilt), and broad compatibility across Infiniti Q50/Q60/Q70 and Nissan 370Z/M37 engines in the specified years. Important limitations are that a few users needed different rear bolts during installation and long-term durability may vary compared with higher-priced OEM units, so expect typical aftermarket variability in fitment details and lifespan.
Best for: Balanced all-round buyers who want a reliable, budget-friendly replacement that restores starting performance on Infiniti Q50 and related V6 models without paying OEM prices.
Less Ideal for: Drivers who prioritize guaranteed factory longevity and warranty-backed parts over cost savings or those unwilling to address minor fitment issues during installation.
- Engine-specific design for Infiniti/Nissan V6 3.0–3.7L applications
- New premium components rather than a rebuilt core
- Factory-orientated output: 12V, 22 Amps and 1.6 kW power rating
- Lower cost alternative to dealer or OEM starters
- Aftermarket fit may require changing or sourcing rear bolts for correct installation
- Long-term longevity can vary compared with higher-cost factory replacements
Verdict: A cost-effective, engine-specific replacement starter that restores reliable starting for Infiniti Q50 and related V6 models without the OEM price.
2. SZKAIDAG Starter Motor for Infiniti Q50/Q70/G37 and Nissan 370Z (23300-EY00E)
| Power Rating | 1.6KW |
|---|---|
| Volts | 12V |
| Number of Teeth | 10 |
| Rotation | CW |
This SZKAIDAG starter motor is a factory-replacement style unit intended to deliver reliable starting for Infiniti models that use the 23300-EY00E family of starters, including the Q50. It installs like the original and is used in the typical service scenario of replacing a failed starter to restore dependable engine cranking. Notable features include a 1.6 kW power rating, a 10-tooth pinion, clockwise rotation, and an electromagnetic switch built for quiet operation. The product emphasizes precision-machined gearing and a copper-graphite brush holder for improved conductivity and long life. In real-world use the starter should offer quick, consistent engagement and reduced noise compared with worn original units. Buyers focused on performance will appreciate the higher torque gearing and claimed strict quality checks during production. Limitations are that compatibility must be confirmed against the OE number or vehicle fitment before purchase and that long-term durability depends on installation environment and electrical system condition rather than the starter alone.
Best for: Performance-oriented owners who want a high-torque, factory-replacement starter to restore crisp, reliable starting on an Infiniti Q50 and prioritize cranking power and quieter engagement.
Less Ideal for: Buyers who prefer dealer-sourced factory parts with OEM brand warranty support or those unwilling to verify fitment precisely from OE numbers or VIN.
- Direct-replacement fit for vehicles using 23300-EY00E starter family, simplifying installation
- 1.6 kW power rating and gear reduction provide strong cranking torque for cold or high-compression starts
- Copper-graphite brush holder and precision-machined gears aimed at stable electrical contact and durability
- Designed for quiet operation with an electromagnetic switch and reduced noise characteristics
- Requires careful cross-check of OE numbers or VIN to confirm exact Q50 compatibility
- Long-term reliability can vary with vehicle electrical system condition and installation quality
Verdict: A performance-minded, factory-replacement starter for the Infiniti Q50 that delivers strong cranking power and quiet operation if you confirm exact fitment first.
3. MOAUTO Starter Motor 17934N Compatible with Infiniti Q50 (2014–2019)
| Voltage | 12 Volts |
|---|---|
| Power rating | 1.6 KW |
| Rotation | CW |
| Teeth | 10 Tooth Pinion |
This MOAUTO starter motor is a budget-focused replacement designed to restore reliable engine cranking on the Infiniti Q50 (2014–2019). It installs in place of the factory unit and provides a 12V, 1.6 kW motor with a 10-tooth pinion and clockwise rotation, so it should mesh correctly with the transmission ring gear when the part number matches. Typical use is simple: remove the failed starter, transfer any brackets or heat shields if needed, and fit the replacement to get the vehicle starting again. Notable practical features include sealed bearings and corrosion-resistant materials intended to improve durability, plus built-in thermal and overload protection for safety. Feedback from owners indicates good fit and functioning comparable to factory-quality starters when the compatibility check is correct. Limitations to keep in mind are that solenoid connections can be tight and require careful installation, and long-term lifespan may vary versus a higher-end remanufactured unit. Expect a cost-effective, serviceable option for returning a Q50 to dependable starting without unnecessary extras.
Best for: Practical optimizers looking to restore reliable starting on an Infiniti Q50 without paying for dealer remanufactured parts and who prioritize straightforward, affordable repairs.
Less Ideal for: Owners who want factory-refurbished starters with extended service life guarantees or who prefer paying for premium, high-mileage remanufactured units from the dealer network.
- Direct-replacement fit for Infiniti Q50 (2014–2019) when selecting the correct part number
- 1.6 kW motor and 10-tooth pinion match common Q50 starter specifications
- Sealed bearings and corrosion-resistant components intended for longer service life
- Includes thermal and overload protection for safer operation
- Solenoid electrical connection is a tight fit and needs careful securing during installation
- Manufacturer warranty and long-term durability may not match dealership remanufactured units
Verdict: A cost-conscious, ready-to-install replacement that returns an Infiniti Q50 to dependable starting when the part number and fitment are confirmed.
4. Ezexpreze Starter Motor compatible with Infiniti Q50 and Nissan 370Z
| Power rating | 1.4KW |
|---|---|
| Voltage | 12V |
| Number of teeth | 10 |
| Rotation | CW (Clockwise) |
This Ezexpreze starter is a budget-focused, direct-replacement unit intended to crank V6 Infiniti Q50 engines and related Nissan/Infiniti models. It is used the same way as any starter: bolt into the factory location, connect battery and solenoid wiring, and it engages the flywheel to start the engine. Notable features listed include a 1.4 kW power rating, 12V operation, 10-tooth pinion and clockwise rotation, and a set of OEM cross-reference numbers for fitment. The practical benefits are straightforward: many buyers report easy bolt-in fit and noticeably faster cranking than aged starters, and the lower price makes it an attractive replacement when you want to avoid dealer markups and core charges. Limitations to consider are typical for value parts: long-term durability can vary between units and some reviews mention failures related to oil intrusion or fitment confusion for manual versus automatic transmissions, so double-check transmission type and mounting before buying. The manufacturer offers DV testing and a one-year guarantee which provides basic recourse if problems appear.
Best for: Budget-conscious buyers who need a quick, low-cost replacement starter for an Infiniti Q50 and prioritize immediate fit and function over long-term OEM-level assurances.
Less Ideal for: Owners who want long-term factory-quality longevity or comprehensive dealer support should consider OEM or higher-end remanufactured starters instead.
- Direct-fit replacement for Infiniti Q50 V6 engines with OEM cross-reference numbers for easier matching
- 1.4 kW, 12V rating provides adequate cranking power for typical V6 starts
- Numerous user reports of straightforward installation and improved cranking compared with worn original starters
- Low-cost option that avoids dealer core charges and can save significant money upfront
- Durability appears inconsistent across units with some reports of early failure from oil ingress or component wear
- Fitment can be transmission-specific so wrong choice may not engage properly on manual transmission vehicles
Verdict: A wallet-friendly, direct-fit starter that gets an Infiniti Q50 turning again quickly, though longevity can vary compared with higher-end replacements.
5. Parts Player 12V Starter Compatible with Nissan/Infiniti 3.7L and 3.0L Engines
| Voltage | 12 |
|---|---|
| Wattage | 1.6 KW |
| Amperage | 1.6 Amps |
| Rotation | CW |
This Parts Player 12V starter is a new, aftermarket replacement designed to bolt into Nissan and Infiniti 3.7L and 3.0L engines. It functions as a direct replacement starter motor with a clockwise rotation and a 10-tooth pinion, and is typically used when an original starter begins cranking slowly or intermittently. Installers report tight clearances during removal and fitting but successful bolt-on installation when following standard starter replacement procedures. Key features visible in the listing include 12V electrical spec, a 1.6 kW output rating and metal construction. In practice the starter delivers immediate cranking and reliable engine starts on models like the Infiniti Q50 and G37, offering strong value versus dealer parts. Limitations to consider are that it is an aftermarket unit so long-term durability versus a factory unit is not guaranteed and mounting can be cramped on some vehicles which may require lifting the engine or removing support brackets for access.
Best for: Reliability-focused owners who want a straightforward, value-minded replacement starter for Infiniti Q50 and related 3.7L/3.0L applications and prefer a ready-to-install unit over dealer sourcing.
Less Ideal for: Buyers seeking a guaranteed factory-lifespan or manufacturer-branded original part should consider dealership or OEM alternatives instead.
- Direct-fit design for specified Infiniti and Nissan 3.7L and 3.0L models reduces modification during installation
- New unit with 1.6 kW output delivers strong, immediate cranking performance
- Metal construction and included starter unit offer a complete replacement ready for bolt-on fitment
- Widely reported successful fit and function on Q50, G37, and 370Z in user feedback
- Aftermarket construction means long-term lifespan may be shorter than some factory parts
- Installation can be tight and may require engine support removal or lift for access
Verdict: A practical, direct-fit aftermarket starter that restores reliable starting performance for Infiniti Q50 and similar 3.7L/3.0L engines at a strong value.
6. A-Premium Starter Motor Compatible with Nissan/INFINITI V6 12V 1.4KW 10T CW
| Voltage | 12 Volts |
|---|---|
| Wattage | 1.4 KW |
| Phase Type | Three Phase |
| Rotation | CW (Clockwise) |
This A-Premium starter motor is a direct-replacement style unit intended for V6 Nissan and INFINITI engines such as the Q50 (2014–2019). It supplies the 12V, 1.4 kW cranking power and uses a 10-tooth pinion with clockwise rotation, so installation follows the same steps as a factory starter and plugs into existing wiring. Typical use is swapping a failed starter during routine repair or diagnosis; the unit arrives ready to bolt in and customers report straightforward fit and dependable cold starts. Notable features include the power rating and the factory-style mounting and pinion count that preserve starter engagement and engine clearance. The practical benefit is a lower-cost replacement that restores reliable starting without modifying the vehicle. Limitations are that it is an aftermarket unit rather than a factory-branded part and that long-term lifespan can vary compared with higher-end remanufactured or dealer parts, so buyers who want extended service life may prefer alternative sources.
Best for: Convenience-driven buyers who want a straightforward, cost-effective replacement that reinstalls like the original starter and gets the car back on the road quickly.
Less Ideal for: Buyers seeking a factory-branded or premium remanufactured unit with extended proven life should consider dealer or specialty remanufactured starters instead.
- Direct-fit design made for V6 Nissan and INFINITI applications including Q50 2014–2019
- Delivers factory-style 12V, 1.4 kW cranking power with 10-tooth pinion and clockwise rotation
- Multiple user reports of easy installation and reliable cold starts
- Includes manufacturer-stated one-year unlimited-mileage guarantee
- Aftermarket construction may not match longevity of high-end remanufactured or dealer starters
- Compatibility limited to the specific vehicle/models listed, so verify reference numbers before purchase
Verdict: A budget-friendly, direct-fit replacement that restores reliable starting for Infiniti Q50 V6 models without extra modification.
7. AOTPAT Starter Motor for Infiniti Q50/Q60/Q70 and Nissan 370Z (12V, 1.4 kW)
| Voltage | 12 Volts |
|---|---|
| Wattage | 1.4 KW |
| Amperage | 2.5 Amps |
| Phase Type | Three Phase |
This AOTPAT starter motor is a direct-replacement unit aimed at Infiniti Q50/Q60/Q70 family cars and Nissan 370Z that need a reliable 12V starter. It installs like a factory replacement and is intended for routine starting duties, with a 1.4 kW motor that delivers quick cranking in cold and warm conditions. Notable features include a three-phase design, copper components, and built-in overheat and overload protection to reduce failure risk during prolonged cranking. The listing emphasizes factory-quality testing and quiet operation, which makes it suitable for DIY installs or professional swaps. Practical benefits are straightforward: restores starting reliability, uses common electrical specs for easy integration, and is covered by a two-year unlimited-mileage warranty. Limitations include the need to confirm exact fitment for your Infiniti or Nissan variant since starters are fit-specific, and some buyers reported occasional fitment or shipping issues; this is not a universal starter and requires matching part numbers before purchase.
Best for: Risk-averse mainstream buyers who prioritize restoring dependable, factory-like starting performance without chasing premium branded parts and who prefer a tested, warrantied replacement.
Less Ideal for: Shoppers seeking a universal starter or those who need a performance-upgraded high-torque unit should look elsewhere instead of this factory-style replacement.
- Designed for direct replacement on covered Infiniti and Nissan models for straightforward installation
- High-efficiency 1.4 kW motor for strong cranking performance
- Built-in overheat and overload protection to enhance durability
- Copper construction and factory-style testing for reliability
- Includes a 2-year unlimited-mileage warranty for peace of mind
- Fitment is vehicle- and part-number specific so verification is required before buying
- Some customers reported delivery or packaging issues unrelated to product function
Verdict: AOTPAT's starter motor offers a factory-style, warrantied replacement focused on dependable starting for covered Infiniti and Nissan models.
Choosing the Right Infiniti Q50 Starter Motor: Key Factors to Consider
Fitment and Compatibility
Correct fitment is the first priority because the starter must align precisely with the Infiniti Q50's bellhousing and mounting points. A starter designed for the vehicle ensures correct bolt patterns, shaft length, and electrical connector types.
Poor fitment can lead to installation headaches, improper engagement with the flywheel, and premature wear. Verify compatibility using the vehicle's VIN or engine code and prefer parts that list explicit Infiniti Q50 fitment to avoid returns and additional labor.
Power Output and Electrical Specs
Starter power ratings, including torque capacity and amperage draw, affect how reliably the unit will crank the engine under various conditions. Higher torque helps with cold starts and engines with higher compression.
Electrical compatibility with the Q50's charging system and battery is also important. Mismatched amperage requirements can strain wiring or lead to weak cranking. Check the technical spec sheet for rated voltage and recommended battery condition to ensure consistent performance.
Drive Mechanism and Solenoid Quality
The drive assembly and solenoid govern engagement between the starter and the engine's flywheel. A durable drive gear and responsive solenoid reduce the chance of grinding, slipping, or failure to engage.
Solenoid reliability also affects click-or-no-crank symptoms and overall starting responsiveness. Look for starters that specify hardened gears, sealed solenoid housings, and tested engagement cycles to minimize common starter solenoid problems.
Construction and Materials
Materials and manufacturing quality determine how well a starter resists wear, corrosion, and heat exposure under the hood. Components like bearings, gear teeth, and housing finishes impact longevity.
Robust construction reduces the likelihood of premature failure and helps maintain consistent performance over many start cycles. Consider starters with corrosion-resistant coatings and reputable manufacturing tolerances for better long-term value.
Ease of Installation and Serviceability
Installation complexity affects total repair time and whether you can handle the job at home or need a shop. Starters that allow access to common fasteners and use standard connectors simplify installation.
Availability of clear installation instructions, alignment guides, and included hardware can cut labor time. Units designed for straightforward swapouts make it easier to follow starter motor replacement steps and reduce the chance of installation errors.
Warranty and Technical Support
A solid warranty and accessible technical support provide protection if the starter fails prematurely or does not meet expectations. Warranty terms indicate the manufacturer's confidence in the product.
Consider the length and coverage of the warranty, how claims are handled, and whether technical documentation is available. Good after-sale support makes troubleshooting symptoms like starter clicking noise or intermittent cranking less stressful.
How We Chose the Best Infiniti Q50 Starter Motor
We focused on components that directly affect starting performance and long-term reliability for the Infiniti Q50. Key evaluation criteria included fitment accuracy to the vehicle's engine and mounting points, electrical compatibility and specified power output, overall build materials and gear design, quality of the drive mechanism and solenoid interface, warranty and manufacturer support documentation, and ease of installation with common tools.We excluded units with unclear vehicle fitment information, poor user reports about premature failures, and options lacking clear technical specifications. Our selection favors starters that balance robust construction with straightforward installation, and that provide clear compatibility details and technical spec sheets relevant to the Infiniti Q50.
Our full evaluation process is outlined in our review methodology.
FAQ
What are common starter motor symptoms on an Infiniti Q50?
Common signs often include a single click or repeated clicking when turning the key, slow cranking, or no crank at all. You may also notice intermittent starts where the engine turns over sometimes but not consistently.These symptoms can result from weak batteries, poor electrical connections, a failing solenoid, or an aging starter motor.
How can I test a starter on an Infiniti Q50?
A basic test starts with checking battery voltage and terminal cleanliness, followed by observing voltage drop while attempting to crank. A significant voltage drop or low battery voltage often points to battery or cable issues.Bench tests and voltage measurements at the starter while cranking can isolate the starter. If electrical supply is good but the starter fails to engage or spins without cranking, the starter itself is likely at fault.
Can I install a starter motor myself on an Infiniti Q50?
Installation ability depends on your tools and experience. Many starters are accessible with common hand tools, but tight engine bays or engine mounts may require lifts or jacks for safe access.Follow vehicle-specific procedures, support the engine if required, and take care disconnecting the battery before starting. If you are unsure about safety or torque specifications, professional installation is advisable.
What causes a starter to click but not crank?
Clicking typically indicates the solenoid is receiving power but the starter motor is not turning. This can be caused by a weak battery, poor ground or positive connections, a failing solenoid, or internal starter damage.Diagnosing starts with battery and connection checks, then testing voltage at the starter while attempting to crank to determine whether the starter is receiving sufficient current.
Are starter motor replacement parts necessary when swapping a starter?
Replacement parts such as new mounting bolts, alignment shims, or electrical connectors are sometimes recommended, especially if existing hardware is corroded or damaged. New gaskets or heat shields may also be needed depending on the vehicle layout.Using fresh hardware and clean connectors helps ensure a secure, long-lasting installation and reduces the chance of future starter-related issues.
Conclusion
When choosing a starter for an Infiniti Q50, prioritize accurate fitment, appropriate electrical and torque specifications, and a robust drive and solenoid design. These factors most directly influence starting reliability and long-term durability.Balance ease of installation and warranty support against construction quality. Addressing common electrical causes first can avoid unnecessary replacement, and when you do replace the starter, selecting a unit that matches the vehicle's specifications reduces the risk of repeat repairs.
Explore More:
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