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If your Infiniti G37 is slow to crank or shows inconsistent starting, choosing the right starter motor matters for daily reliability. A correct replacement restores reliable ignition, reduces troubleshooting time, and prevents roadside failures. This guide covers the top shortlisted starter motors for the Infiniti G37 and explains the practical reasons each was considered.We evaluated candidates based on fitment accuracy, electrical output, durability, and ease of installation, so you can pick a unit that fits your maintenance plan. Read on for the factors that mattered and simple checks to identify common starter issues.
Looking for other parts? See all Infiniti G37 parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | Premier Gear PG-17934 12V Starter (CW, 10 Tooth) |  |
| Best quality Built to a higher standard if you want something more solid | SZKAIDAG Starter Motor for Infiniti G37 (3.7L) |  |
| Best Value The sweet spot between price and what you get | MOAUTO Starter Motor 17934N Compatible with Infiniti G37 and Nissan 370Z |  |
| Best budget The cheapest option that still gets the job done reliably | Ezexpreze Starter Motor Compatible with Infiniti G37 and Nissan 370Z |  |
| Highest Rated A top-rated pick with lots of positive feedback | Parts Player Compatible Starter for Infiniti G37 / Nissan 370Z (12V, CW, 10 Tooth) |  |
| Most Popular A crowd favorite that many people choose with confidence | A-Premium Starter Motor for Infiniti/Nissan 3.0–3.7L (12V, 1.4kW, 10T, CW) |  |
| Best Seller A high-volume bestseller chosen again and again | AOTPAT Starter Motor compatible with Infiniti and Nissan 12V 1.4kW (23300-EY00E) |  |
1. Premier Gear PG-17934 12V Starter (CW, 10 Tooth)
| Voltage | 12 |
|---|---|
| Amperage | 22 Amps |
| Wattage | 1.6 KW |
| Rotation | CW |
| Model | 12V Rotation: CW 10 Tooth |
This Premier Gear PG-17934 starter is a new, direct-replacement unit built to match factory performance for compatible Infiniti G37 and related models. It installs and functions like a factory replacement starter, delivering reliable cranking and quick starts when fitted to the listed 3.7L and selected 3.0L engines. Notable features from the listing include 12V operation, a clockwise rotation, a 10-tooth pinion and a rated 22 amp draw, which in practice means predictable engagement and consistent starter motor power under normal conditions. Buyers will appreciate that the part is offered as a new unit rather than rebuilt and that many owners report straightforward installation and improved starting behavior. Trade-offs are typical of aftermarket starters: occasional minor fitment quirks (some users replaced two rear bolts) and the unit is not an Infiniti-branded OEM part, so long-term durability can vary versus dealer-sourced replacements. The starter comes backed by a limited warranty and has broad compatibility across Infiniti and Nissan V6 models within the stated year ranges.
Best for: Balanced buyers who want a cost-effective, factory-style replacement starter for Infiniti G37 and similar V6 models without paying dealer premiums.
Less Ideal for: Drivers seeking a dealer-branded OEM unit or those who prefer rebuilt/remanufactured starters with different warranty terms should consider other options.
- Designed as a new direct-replacement for specified Infiniti/Nissan V6 models
- Matches factory electrical characteristics with 12V/22A rating for consistent cranking
- CW rotation and 10-tooth pinion ensure correct mechanical engagement when matched to the vehicle
- Many users report easy installation and noticeably improved starting performance
- Some aftermarket fitment differences reported requiring replacement of a couple of bolts
- Not an Infiniti-branded OEM part so long-term parity with dealer units can vary
Verdict: A ready-to-install, factory-spec replacement starter that restores reliable starting for compatible Infiniti G37 and related V6 models.
2. SZKAIDAG Starter Motor for Infiniti G37 (3.7L)
| Power Rating | 1.6 kW |
|---|---|
| Voltage | 12V |
| Rotation | CW |
| Number of Teeth | 10 |
This SZKAIDAG starter motor is built as a direct replacement for the Infiniti G37 3.7L and is intended to restore reliable engine starting without modifications. It installs like a factory replacement and is used in the same way as the original part to engage the flywheel and crank the engine. Notable features include a 1.6 kW power rating, a CW rotation, a 10‑tooth drive, and an integrated electromagnetic switch and gear reduction box to increase torque while controlling speed. In practice that means strong, consistent engagement for cold starts and repeated starts during everyday driving or performance use. The listing emphasizes precision-machined gears, copper‑graphite brush holders for durability, and a quiet design that reduces cabin noise during cranking. Important limitations are that fitment must be confirmed against OE numbers and VIN before purchase and that long‑term longevity will depend on correct installation and vehicle condition. For a performance-oriented buyer looking to replace a failing starter on an Infiniti G37, this unit offers factory-style function at a competitive value.
Best for: Performance-oriented owners who prioritize dependable, strong starting and want a factory‑style replacement that restores starting power for spirited driving and frequent use.
Less Ideal for: Buyers who prefer dealer-sourced factory warranty support or those unwilling to verify part numbers and VIN for exact fitment should consider alternatives.
- Direct replacement designed for Infiniti G37 3.7L 2008–2013 for straightforward bolt‑in installation
- 1.6 kW power rating and gear reduction design provide higher cranking torque for reliable starts
- Copper‑graphite brush holders and precision gears for improved conductivity and durability
- Designed for quiet operation to reduce cranking noise in the cabin
- Compatibility requires careful OE number or VIN confirmation before ordering
- Aftermarket brand longevity may vary compared with factory parts in some cases
Verdict: A performance-focused, factory-fit replacement starter for the Infiniti G37 3.7L that delivers strong cranking torque and quiet operation when fitment is confirmed.
3. MOAUTO Starter Motor 17934N Compatible with Infiniti G37 and Nissan 370Z
| Rotation | CW |
|---|---|
| Teeth | 10 Tooth Pinion |
| Volts | 12 Volts |
| Power Rating | 1.6 KW |
This MOAUTO starter is a budget-focused replacement designed to restore reliable engine cranking on Infiniti G37 V6 models. It installs like a factory replacement and is typically used when an original starter fails or develops dead spots; most buyers will swap it in using basic hand tools or have a shop handle the job. Notable features listed include a 1.6 kW power rating, 12 volt operation, clockwise rotation and a 10-tooth pinion, which translate to sufficient torque for cold and routine starts. The listing emphasizes corrosion-resistant components, sealed bearings, and thermal/overload protection that aim to improve longevity and reduce noise. Practical benefits are strong starting performance, energy-efficient operation, and reduced vibration compared with older failing units. Limitations to note are that fit and correct electrical connections must be verified before installation and some users report the solenoid connection requires careful securing; long-term durability beyond initial use is supported by a one-year after-sales service but not guaranteed beyond that period.
Best for: Practical optimizers who want a low-cost, factory-style replacement for an Infiniti G37 starter that balances upfront savings with reasonable build features.
Less Ideal for: Buyers seeking a long-term performance upgrade or extended warranty coverage should consider premium remanufactured or dealer units instead.
- Designed as a direct factory-style replacement for Infiniti G37 starting systems
- 1.6 kW, 12V motor provides the torque needed for reliable cold and regular starts
- Sealed bearings and corrosion-resistant parts aim to reduce maintenance and noise
- Includes thermal and overload protection for safer operation
- Compatibility and correct electrical connections must be double-checked before installation
- Only comes with a one-year after-sales service so long-term lifespan beyond early use is uncertain
Verdict: A cost-effective, factory-fit replacement starter for Infiniti G37 owners who prioritize practical savings while restoring dependable starting performance.
4. Ezexpreze Starter Motor Compatible with Infiniti G37 and Nissan 370Z
| Power Rating | 1.4 kW |
|---|---|
| Voltage | 12V |
| Number of Teeth | 10 |
| Rotation | CW |
This Ezexpreze starter motor is a cost-focused replacement designed to restore reliable cranking on compatible V6 Infiniti and Nissan engines, including the Infiniti G37 (2008–2013) with the 3.7L V6. It installs like a direct replacement and is used the same way as the factory unit to engage the flywheel and turn the engine over during starting. Key features listed are a 1.4 kW power rating, clockwise rotation, 10-tooth pinion and common OEM part numbers to match factory fitment. In real-world use buyers report straightforward bolt-in installs and immediate improvement in cranking compared with tired originals, and the lower price makes it an attractive option for budget repairs. Downsides to consider are mixed long-term durability reports and the single-year guarantee instead of a multi-year warranty, so there is some risk if the unit fails after initial use. Also confirm transmission and tooth-count compatibility for your specific G37 before purchase to avoid fitment surprises.
Best for: Budget-conscious owners seeking an affordable, quick starter replacement for an Infiniti G37 who prioritize immediate function and lower upfront cost over a long factory-quality warranty.
Less Ideal for: Owners who want a long-term factory-quality remanufactured unit or extended warranty coverage should consider higher-end replacements or dealer options.
- Designed to match factory part numbers for direct replacement fit on compatible Infiniti and Nissan V6 models
- 1.4 kW power rating offers solid cranking performance compared with worn original starters
- Many buyers report easy bolt-in installation and immediate improvement in engine turnover
- Significantly lower cost than dealer or remanufactured starters for budget repairs
- Limited long-term durability reported by some users compared with more expensive remanufactured units
- Supplier warranty is one year only which is shorter than some alternatives
Verdict: A very affordable, bolt-in replacement for the Infiniti G37 that delivers good starting performance up front but comes with some questions about long-term durability.
5. Parts Player Compatible Starter for Infiniti G37 / Nissan 370Z (12V, CW, 10 Tooth)
| Voltage | 12 |
|---|---|
| Wattage | 1.6 KW |
| Amperage | 1.6 Amps |
| Phase Type | Three Phase |
This Parts Player compatible starter is a direct-replacement unit for Infiniti G37 and similar VQ 3.7L applications that supplies 12 volts and about 1.6 kW of cranking power. It is installed in place of the factory starter to restore reliable engine starting when a worn unit shows slow or intermittent cranking. The design matches factory mounting and tooth count so it bolts into the bellhousing with minimal modification, and reviewers report immediate, strong cranking after installation. It ships as a new motor with a one year warranty and includes the starter only, so expect to reuse mounting hardware or seals from the original. Practical benefits are straightforward: lower cost than dealer parts, immediate restoration of starting performance, and generally tight OEM-like fit. Limitations are typical for third-party starters — longevity can vary versus long-term factory parts, and the foam seal may need attention to keep moisture out of the bellhousing during service life.
Best for: Reliability-focused owners who want a cost-effective replacement that restores consistent starting without paying dealer prices and who prioritize getting the car back on the road quickly.
Less Ideal for: Buyers seeking the longest possible factory-spec lifespan or a fully remanufactured dealer unit may prefer OEM or premium remanufactured starters instead of this aftermarket option.
- Direct-fit design for Infiniti G37 and related VQ 3.7L engines, easing installation
- New 12V, 1.6 kW motor provides strong, immediate cranking performance
- Generally lower cost than dealership starters while matching factory mounting
- Backed by a one year warranty
- Longevity may be shorter than high-end factory or OEM replacements
- Does not include mounting hardware or full moisture sealing components
Verdict: A budget-friendly, direct-fit replacement starter that restores reliable cranking for Infiniti G37 owners without dealer pricing.
6. A-Premium Starter Motor for Infiniti/Nissan 3.0–3.7L (12V, 1.4kW, 10T, CW)
| Voltage | 12 Volts |
|---|---|
| Wattage | 1.4 KW |
| Phase Type | Three Phase |
| Rotation | CW (Clockwise) |
This A-Premium starter is a direct-replacement style unit for Infiniti G37 and related Nissan/Infiniti V6 models, offering a 12V, 1.4 kW motor with a 10-tooth clockwise pinion. It is used to replace a failed factory starter and restore reliable cranking; installation is typical for starter swaps and reviewers report straightforward fitment on G37/Q50/Q60 applications. Notable features include the factory-replacement power rating and multiple OEM reference numbers for fit confirmation. Practical benefits include strong cold-start cranking and a compact design that matches factory mounting locations, plus a one-year unlimited-mileage guarantee from the brand. Limitations are that this is an aftermarket unit rather than a factory-branded starter so finish and noise levels can vary unit to unit, and buyers should verify the part reference against their vehicle before ordering to ensure exact compatibility.
Best for: Convenience-driven buyers who want a straightforward, budget-friendly replacement that restores reliable starting without sourcing a dealer unit or lengthy parts searches.
Less Ideal for: Buyers seeking a factory-branded starter, lifetime coverage, or a dealer-level warranty should consider dealer or remanufactured factory options instead.
- Factory-replacement power rating (1.4 kW) suitable for V6 engines
- Direct-fit design with multiple OEM reference numbers for easier fit verification
- Consistent cold-start cranking reported by owners
- Backed by a one-year unlimited-mileage guarantee from the brand
- Aftermarket construction means appearance and NVH may differ from factory units
- Not vehicle-specific packaging or instructions may require basic mechanical experience for installation
Verdict: A practical, budget-friendly replacement starter that restores reliable cranking for Infiniti G37 and related V6 models.
7. AOTPAT Starter Motor compatible with Infiniti and Nissan 12V 1.4kW (23300-EY00E)
| Voltage | 12 Volts |
|---|---|
| Wattage | 1.4 KW |
| Amperage | 2.5 Amps |
| Phase Type | Three Phase |
This AOTPAT starter motor is a direct-replacement unit sold for Infiniti Q50/Q60/Q70 and related models plus the Nissan 370Z; it supplies 12 volts and about 1.4 kW of starting power with a 10-tooth, clockwise pinion. It is intended for DIY or shop replacement and arrives fully assembled with mounting points set to match factory interfaces. Notable features include a high-efficiency motor design for reliable cold starts, built-in overheat and overload protection to reduce failure risk, and noise-reduction measures for quieter cranking. The listing states the unit is tested to factory-level standards and includes a 2-year unlimited-mileage warranty, which adds peace of mind for mainstream buyers. Customers report straightforward installation and solid fit when matched to the correct part numbers, though one review noted fitment interference on an unrelated vehicle. Expect a functional, cost-effective factory-quality replacement when you confirm compatibility with your G37's exact part number and flywheel clearance requirements.
Best for: Risk-averse mainstream buyers who prioritize a tested, factory-quality replacement and want a straightforward fix that restores reliable starting without upgrades or tuning.
Less Ideal for: Performance-focused owners looking for higher-torque or lightweight high-output starters, or buyers who need cross-vehicle universal fitment rather than a vehicle-specific replacement.
- Direct replacement for listed Infiniti and Nissan 370Z applications with matching part references
- High-efficiency 12V, 1.4 kW motor design for reliable starting performance
- Built-in overheat and overload protection to help prevent premature damage
- Quiet operation design reduces cranking noise
- Backed by a 2-year unlimited-mileage warranty for added assurance
- Fitment must be verified against the vehicle part number and clearance as some vehicles may have interference issues
Verdict: AOTPAT's tested, vehicle-specific starter offers a practical factory-quality replacement that restores reliable starting for covered Infiniti G37 applications.
Choosing the Right Infiniti G37 Starter Motor: Key Factors to Consider
Fitment and Mounting Pattern
Correct physical fit is essential because the starter must align precisely with the flywheel or flexplate teeth. A mismatched mounting pattern or offset can cause grinding, premature wear, or failure to engage, which leads to repeated repairs and added labor.
Check bolt hole spacing, starter length, and the orientation of the electrical connectors. Even small differences in nose length or housing thickness can affect engagement depth and clearance around transmission housings, so fitment details determine whether a unit is truly direct-replacement or requires modification.
Electrical Output and Torque
Starter motors need sufficient torque to turn an engine, especially in higher-compression or colder conditions. Look for rated torque or power output and the expected current draw at rated voltage. A unit that supplies higher torque at acceptable current draw reduces the chance of slow cranking and can compensate for minor battery or starter ring wear.
Evaluate the starter's motor design, such as gear reduction versus direct drive, because gear-reduction units typically deliver higher torque for the same current. Understanding electrical requirements helps avoid overstressing the vehicle wiring or triggering charging system issues.
Solenoid and Engagement Mechanism
The solenoid both switches high current and actuates the pinion to engage the flywheel. Reliable solenoid action prevents partial engagement that causes clicking noises, gear damage, or failure to crank. Solenoid durability and contact design influence long-term reliability, especially under frequent start cycles.
Consider whether the solenoid is integrated or serviceable and whether replacement parts are available. Clear, robust electrical terminals and secure mounting reduce intermittent faults that mimic battery or ignition problems.
Durability and Build Quality
A starter endures high torque loads, heat, and vibration. Materials and construction details such as sealed bearings, quality brushes, and robust gear materials significantly affect service life. Units with reinforced housings and corrosion-resistant finishes withstand harsh garage and road environments better.
Look for evidence of quality control like balanced armatures and tight tolerances. Durability reduces repeat labor and the need for frequent replacements, so build quality is a major determinant of long-term value.
Ease of Installation and Serviceability
Ease of installation lowers labor time and the chance of installation error. Starters that use OEM-style connectors, accessible mounting bolts, and clear wiring locations are faster to fit. If you plan to perform the swap yourself, consider the physical clearance required and whether the vehicle must be raised or components removed.
Serviceability matters too; starters with replaceable solenoids or pinions let you swap only the worn parts instead of the entire unit, which can be more convenient for maintenance-oriented owners.
Compatibility With Vehicle Electrical System
The starter must work with the G37 electrical system voltage and starter relay arrangement. Verify that the unit's terminal layout, ground paths, and activation voltage match the vehicle to avoid parasitic drains or starter cycling issues.
Also consider how the starter interacts with other starting system components such as neutral safety switches or immobilizers. Ensuring electrical compatibility reduces the chance of troubleshooting unrelated fault codes after installation.
How We Chose the Best Infiniti G37 Starter Motor
We prioritized starter motors that match Infiniti G37 factory specifications, focusing on physical fit, mounting pattern, and electrical connections to ensure direct compatibility. Electrical performance was measured by rated torque and current draw data where available, since sufficient torque and proper amperage are critical for consistent cranking. Durability considerations included rated service life, materials used in drive and gear components, and manufacturing quality indicators such as balanced rotors and sealed housings.We also evaluated ease of installation, including access to mounting bolts and connector types, and the availability of replacement pinion gears and solenoids as common service items. Units lacking clear fitment documentation or with nonstandard electrical interfaces were excluded. Finally, warranty coverage and manufacturer support were weighed as indicators of expected longevity and post-purchase serviceability.
Our full evaluation process is outlined in our review methodology.
FAQ
What are common starter motor symptoms on an Infiniti G37?
Common symptoms include slow cranking, a single click or rapid clicking when you turn the key, or intermittent failure to crank. You may also notice grinding sounds if the pinion is not engaging the flywheel properly. These signs often indicate wear in the starter drive, solenoid issues, or insufficient electrical output.
How can I test a starter on my Infiniti G37?
A basic test is to check battery voltage while cranking; a healthy system usually stays above a certain threshold. You can also listen for solenoid engagement and measure voltage at the starter terminal under load. Many technicians perform a bench test or use a starter draw tester to measure current and confirm mechanical engagement. If uncertain, a professional test isolates starter issues from battery or wiring faults.
Is a clicking noise always a bad starter sign?
Clicking often indicates the solenoid is trying to engage but the starter cannot draw enough current, which can be due to a weak battery, poor connections, or a failing starter. It is not always the starter itself; checking battery health and terminal cleanliness is a useful first step. Persistent clicking after those checks usually points toward the starter or solenoid.
Can I install a replacement starter myself?
Many owners with basic mechanical skills can replace a starter, but accessibility on the Infiniti G37 can vary with model year and engine layout. You will typically need standard hand tools, safe vehicle lifting equipment, and attention to electrical disconnection to prevent shorts. If you are uncomfortable with underbody work or diagnosing electrical issues, consider professional installation.
What should I consider about starter motor replacement parts availability?
Availability of replacement pinions, brushes, or solenoids affects long-term service options. Choosing a unit with documented service parts makes future repairs easier and may be more cost effective. Also check that mounting hardware and connectors are included or clearly specified to avoid compatibility headaches during installation.
Conclusion
When replacing a starter on an Infiniti G37, prioritize fitment accuracy, adequate torque output, and a reliable solenoid mechanism. Balancing electrical compatibility and build quality reduces the risk of repeated failures and makes installations smoother.Consider ease of service and the availability of replacement parts if you expect to maintain the starter over time. Focus on the factors outlined above to pick a unit that aligns with how you drive and how much maintenance you are willing to perform.
Explore More:
- Check out all Infiniti G37 parts & accessories
- Explore Starter Motors Maintenance & Repair Guides
- Explore Electrical System
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