Note: This article contains affiliate links. If you click on these links and make a purchase, I may earn a small commission at no extra cost to you. This helps support my research and content. Read my full affiliate disclosure here.
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 Reviewed A top-rated pick with lots of positive feedback | Boatrip Starter Motor Replacement 19068 (fits select Nissan/Infiniti V8 engines) |  |
| Most Popular A crowd favorite that many people choose with confidence | SCITOO Starter Motor 1.4 kW 12V 12-Tooth for Infiniti G35/EX35/FX35/M35 (fits G35 2007-2008) |  |
| Best Quality Built to a higher standard if you want something more solid | SZKAIDAG Starter Motor for Infiniti G37 (3.7L) |  |
| Best Budget The cheapest option that still gets the job done reliably | Ezexpreze Starter Motor Compatible with Infiniti G37 and Nissan 370Z |  |
| Most Sold A high-volume bestseller chosen again and again | Boatrip Starter Motor Replacement S114-902A (fits Nissan/Infiniti L4 engines) |  |
| Best Value for Money The sweet spot between price and what you get | MOAUTO Starter Motor 17934N Compatible with Infiniti G37 and Nissan 370Z |  |
| Best Overall The best all-around choice for most situations | A-Premium Starter Motor Compatible with Nissan and Chevrolet Vehicles, 12V 1.0KW, 10 Teeth, Clockwise |  |
1. Boatrip Starter Motor Replacement 19068 (fits select Nissan/Infiniti V8 engines)
| Wattage | 2 KW |
|---|---|
| Phase Type | Single Phase |
| Manufacturer | Boatrip |
| Item model number | 19068 |
This Boatrip starter is a direct-replacement style unit built to match factory mounting and electrical connections for compatible Nissan/Infiniti V8 engines. It is typically used when the original starter fails and needs a like-for-like swap; installation involves unbolting the old starter and plugging in the same wiring and solenoid connections. The listing highlights manufacturing quality controls and a two-year replacement warranty, and customer reports show it reliably cranks engines and fits without modification when the correct model is selected. Practical benefits include a standardized fit for straightforward installation and components claimed to meet OEM performance so you should expect normal starting power. Limitations are variability in long-term durability based on a mix of reviews and the need to confirm exact fitment for the G37 since this unit is listed primarily for larger V8 models; if the unit is not the exact match for the G37 engine variant, it will not be compatible. Expect typical used-car replacement realities such as occasional warranty service interactions if issues arise.
Best for: Reliability-focused buyers who prioritize a close-to-factory replacement and want a product supported by manufacturing quality controls and a multi-year replacement policy for peace of mind.
Less Ideal for: Shoppers who prefer dealer-sourced factory parts or who want a guaranteed match for engines not explicitly listed for this unit should look for a starter specified directly for the G37.
- Designed as a factory-replacement style starter for compatible Nissan/Infiniti applications
- Manufactured under certified quality systems and sold with a two-year replacement warranty
- Standardized production for accurate fitment that simplifies installation
- Multiple customer reports of reliable starting performance and straightforward swap-in fit
- Product listing and some reviews indicate inconsistent long-term durability for a minority of units
- Primary fitment references larger V8 models, so compatibility with the Infiniti G37 requires careful verification
Verdict A budget-friendly, factory-style replacement with a two-year replacement warranty that can be a good reliability-focused choice only if you confirm exact fitment for the Infiniti G37.
2. SCITOO Starter Motor 1.4 kW 12V 12-Tooth for Infiniti G35/EX35/FX35/M35 (fits G35 2007-2008)
| Power Rating | 1.4 kW |
|---|---|
| Voltage | 12V |
| Rotation | CW |
| Pinion Teeth | 12-Tooth |
| Type | PMGR |
This SCITOO starter motor is a bolt-in replacement built to match common starter specifications for the 3.5L Infiniti family, including the G35 which shares components with the G37 line in many parts discussions; it delivers a 1.4 kW motor, clockwise rotation, and a 12-tooth pinion. Typical use is vehicle starting after the original unit fails or for preventive replacement. The unit arrives boxed and includes the starter only; buyers report straightforward installation and generally reliable starting performance when fitment matches. Notable features are the power rating that meets factory-style cranking needs and the PMGR type design that simplifies engagement. Practical benefits include lower-cost replacement compared with dealer parts and many users noting immediate reliable starts. Limitations to keep in mind are mixed long-term durability reports and occasional fitment or terminal differences that may require minor on-car adjustments or hardware swaps. If exact fit and long service life are critical, professional verification against your Infiniti G37 VIN or mechanic inspection is advised prior to installation.
Best for: Convenience-driven buyers who want a ready replacement that installs quickly and gets a disabled Infiniti back on the road without sourcing dealer parts.
Less Ideal for: Owners seeking a long-term premium remanufactured or OEM replacement with extended durability testing should consider higher-tier options or dealer parts instead.
- Rated 1.4 kW power suitable for factory-style cranking
- Designed for 12V electrical systems with clockwise rotation to match factory orientation
- 12-tooth pinion and PMGR design compatible with common Infiniti starter setups
- Boxed unit intended as a direct replacement for like-for-like starter failures
- Some customers report early failures or intermittent engagement requiring tapping to start
- May need minor terminal or hardware adjustments for perfect fit on certain vehicles
Verdict A budget-friendly, ready-to-install starter that restores starting function quickly but may show mixed long-term durability compared with higher-end or factory replacements.
3. 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.
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. Boatrip Starter Motor Replacement S114-902A (fits Nissan/Infiniti L4 engines)
| Manufacturer | Boatrip |
|---|---|
| Item model number | S114-902A |
| Manufacturer Part Number | YWHI3001 |
| Warranty | 2-year free replacement |
This Boatrip starter motor is a direct-replacement unit intended to restore starting function on compatible L4-engine Infiniti G37 applications where this mounting and gear configuration match. It installs the same way a factory replacement would: disconnect battery, unbolt the old starter, swap electrical connections and mount the new unit. The listing highlights ISO/IAFT 16949 production standards and a two-year free replacement warranty, which provides reassurance for risk-averse buyers. Users report straightforward fitment and easy DIY installs when the part matches the vehicle, and the standardized production aims to reduce fitment surprises. Expect typical starter behavior: reliable cranking when electrical and engine conditions are normal. Limitations to consider are occasional quality-control failures reported by a minority of customers and the need to confirm exact G37 year/engine compatibility before ordering, since incorrect fitment or a defective unit can leave the car unable to crank. This unit is best treated as a cost-effective factory-style replacement when matched precisely to the G37's starter specifications.
Best for: Risk-averse mainstream Infiniti G37 owners who prioritize a factory-style replacement with a clear warranty and prefer a straightforward DIY or shop swap to restore reliable starting.
Less Ideal for: Shoppers who prefer fully remanufactured starters with extended testing certification or who need guaranteed bench-tested units before installation should consider other options.
- Manufactured to IAFT 16949-aligned quality processes for consistent production
- Designed as a direct-fit replacement to simplify DIY installation
- Includes a two-year free replacement warranty for added peace of mind
- Multiple verified buyers report correct fit and reliable starting on compatible vehicles
- Some customers reported receiving defective units that did not spin
- Fitment must be carefully verified for the specific G37 year and engine to avoid returns
Verdict A budget-friendly, factory-style starter choice for Infiniti G37 owners who confirm exact fitment and value a two-year replacement warranty.
6. 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.
7. A-Premium Starter Motor Compatible with Nissan and Chevrolet Vehicles, 12V 1.0KW, 10 Teeth, Clockwise
| Volts | 12V |
|---|---|
| Power Rating | 1.0KW |
| Number of Teeth | 10 |
| Rotation | CW (Clockwise) |
This A-Premium starter motor is a direct-replacement style unit that provides the basic function of engaging the flywheel and spinning the engine to start. It is typically used as a factory-quality replacement when a vehicle’s original starter fails; installation is straightforward on compatible models and several reviewers report quick, bolt-on swaps. Notable features from the listing include a 12V, 1.0KW motor rating, a 10-tooth pinion, and clockwise rotation, which are important to match when selecting a replacement. Practical benefits are reliable starting performance for everyday use and broad compatibility with several Nissan and Chevrolet models, plus a one-year unlimited-mileage guarantee for peace of mind. Limitations include occasional quality-control issues reported by a small number of buyers and a design that may differ slightly from factory parts, which can require reusing small hardware from the old unit during installation. This is a sensible choice if you need a cost-effective, functional starter and confirm fitment carefully before ordering.
Best for: Balanced buyers who prioritize a reliable, cost-conscious replacement that performs like a factory-style unit and want a simple swap to get a daily driver back on the road.
Less Ideal for: Drivers seeking a starter specifically for the Infiniti G37 should avoid this unit and choose a starter listed explicitly for that model to ensure correct fitment and performance.
- Factory-replacement style with common electrical and mechanical specs for easy swap-in
- 1.0KW motor power suitable for typical small four-cylinder engines
- Clear specification of rotation and tooth count to help ensure correct fitment
- Many user reports of quick, trouble-free installation and dependable starting
- One-year unlimited-mileage guarantee from the brand
- Not guaranteed to match factory appearance or all mounting details which can require transfer of small hardware
- A few customer reports of damaged connectors or out-of-box defects
- Fitment is for listed Nissan and Chevrolet models only and must be verified for other vehicles
Verdict A practical, budget-minded factory-style starter that works well when its rotation and tooth count match the vehicle, but confirm exact fitment before buying.
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.
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.
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.
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 Electrical System
- Browse all Auto Parts
