The typical all-in price to replace an alternating on a INFINITI G35 falls around $400 to $800, depending on parts choices and labor rates. Dealerships tend to be at the high end, while independent shops and remanufactured parts can lower the bill.
Understanding what drives that price helps you plan: the year and engine of the G35 (most are the VQ35DE 3.5L), the availability of remanufactured versus new OEM units, and local labor costs. The following breakdown covers what to expect and how to shop for the best deal.
Cost estimates and ranges
Prices break down into three main components: parts, labor, and extras. The ranges below reflect typical market pricing across North America as of 2024.
- Parts costs: Remanufactured or rebuilt alternators commonly cost $150–$250. New OEM (original equipment) units are typically $350–$500. Aftermarket new units can run $120–$300, depending on supplier and warranty.
- Labor costs: Labor time is usually 1.5–3.5 hours, with shop rates commonly $80–$120 per hour. In urban areas or high-demand shops, rates can climb to $150–$200 per hour, increasing the total.
- Extras and potential diagnostics: A worn belt, tensioner, or pulley may need replacement. Battery testing or replacement could add $50–$200 if needed, and some shops charge a diagnostic fee if the issue isn’t clearly diagnosed.
In practice, most INFINITI G35 owners see a total around $400–$800 for the job when using an independent shop with a remanufactured unit. If you choose a dealership or a brand-new OEM part, totals can push toward $700–$1,000 or more, particularly in areas with high labor rates.
DIY vs professional replacement
Deciding whether to tackle the job yourself or hire a professional hinges on your toolkit, experience, and comfort with automotive electrical work. Below are key considerations.
DIY considerations
- Potential savings: Doing it yourself can cut labor costs, often by roughly $120–$400 depending on local rates and whether extra parts are needed.
- Risks: An incorrect installation can damage the alternator, battery, or serpentine belt, or lead to intermittent charging issues. It also requires careful handling of the electrical system to avoid shocks or shorts.
- Time and equipment: Expect 2–4 hours for a competent DIYer with basic tools; you’ll need a serpentine belt tool, socket set, torque wrench, wrenches, and a healthy work space.
Bottom line: If you have the right tools and mechanical experience, DIY can reduce the bill, but if you’re unsure about wiring or belt routing, hiring a pro minimizes risk and often saves time in the long run.
Part and supplier options
Where you buy the alternator and whether you opt for OEM versus aftermarket can move the price. Here are common sources and considerations.
- OEM versus aftermarket: OEM new units are the most expensive but offer factory-built reliability; remanufactured OEM or high-quality aftermarket remanufactured units balance price and reliability.
- Where to shop: Infiniti/Nissan dealerships, major auto parts chains (AutoZone, Advance Auto Parts, O’Reilly), and online retailers (RockAuto, PartsGeek) often stock ignitions and alternators for the G35. Always verify compatibility with your exact model year and engine code (VQ35DE for most G35s).
- Warranty and returns: Check the warranty length (commonly 1–2 years for remanufactured units) and whether labor is covered if the part fails within the warranty period.
Part choice can affect not only price but longevity and reliability. If the vehicle is nearing the end of its life or you plan to keep it for several more years, investing in a reputable OEM or a well-reviewed remanufacturer can pay off.
Summary
Replacing the alternator on a INFINITI G35 typically costs around $400–$800 when performed by an independent shop with a remanufactured unit, with higher totals if done at a dealership or when using a brand-new OEM part. Parts choices (remanufactured vs OEM), local labor rates, and any needed extras (belt, tensioner, battery) are the primary price drivers. DIY replacement can lower costs for qualified enthusiasts, but carries risks if you’re not comfortable with automotive electrical work. Always verify compatibility and warranty when purchasing parts, and shop around for quotes to find the best overall value.