Typically, you should expect to pay about $200–$900 for the alternator itself, plus labor. The exact price depends on whether you buy a remanufactured unit, a brand-new OEM part, or a used salvage-yard unit, and on your location and shop rates.
The 2008 BMW 335i (models built on the E90 sedan and E92/E93 body styles) uses a belt-driven alternator as part of its charging system. Prices vary by source and part type—OEM vs. aftermarket, new vs. remanufactured—and by local labor rates. The following sections outline current pricing, installation considerations, and tips to save.
Pricing and part options
Below are the typical price bands you’ll see when shopping for an alternator for this model. Note that installation is extra and can vary by shop.
- New OEM or dealer-branded alternator (BMW/Bosch supply): typically $450–$850, depending on supplier and availability. Some dealers may charge a higher price, especially for newer stock or enhanced output units. Core charges may apply if the dealer uses a core exchange.
- Remanufactured aftermarket alternator (common brands like Bosch Reman, Valeo): typically $200–$450. These often come with a warranty (commonly 1–3 years) but may vary by vendor.
- Used or salvaged alternator (tested, from a salvage yard): typically $100–$250, with variable reliability and warranty; confirm testing and return policies.
- Rebuilt or reconditioned units from independent repair shops: typically $250–$450, often with a limited warranty.
Prices fluctuate by retailer, location, and current supply. Always verify the exact price and warranty before purchase.
Labor, installation time, and extra costs
In addition to the part, labor costs and potential extras affect the total bill. Here are typical expectations.
- Labor time: about 1 to 2 hours in most independent shops; longer at some dealerships or if access is challenging.
- Labor rate: roughly $80–$150 per hour, depending on region and shop expertise.
- Possible extras: drive belt/tensioner replacement if worn, alternator mounting hardware, battery testing, and in some cases battery registration or light-code resets for BMW charging systems. Availability of programming is usually not required for a straight alternator swap on this model, but confirm with your mechanic.
Labor costs can significantly affect total price, especially in markets with higher hourly rates or added diagnostic time.
Where to buy and how to compare quotes
To maximize value, compare quotes from multiple sources and consider warranty, return policies, and whether shipping is included for online purchases. The following options are common:
- BMW authorized dealers and service centers
- Independent auto-electric shops and multi-brand repair shops
- Online auto parts retailers (for example, RockAuto, AutoZone, Advance Auto Parts, PartsGeek)
- Salvage yards and used-parts suppliers
When evaluating options, weigh the cost against reliability, warranty length, and the risk of a part with shorter life expectancy. If you drive frequently or rely on your BMW for daily commuting, investing in a solid remanufactured or OEM unit with a good warranty can pay off in fewer headaches down the line.
Warranty considerations
Warranty terms vary by seller and part type. OEM new parts often come with a 1–2 year warranty, while remanufactured aftermarket units may offer 1 year or longer depending on the provider. Always review the warranty details, coverage limits, and whether returns or exchanges are allowed if the part fails within the warranty period.
Summary
For a 2008 BMW 335i, the cost of replacing the alternator ranges widely depending on the part type and the source. Expect part prices roughly in the $200–$850 range, with labor typically adding $80–$150 per hour and 1–2 hours of work. Consider OEM versus remanufactured options, weigh warranty terms, and shop around for quotes from dealers, independent shops, online retailers, and salvage yards. Planning ahead and comparing multiple offers can help you balance reliability and cost while minimizing downtime.