Valeo 849121 Alternator

Valeo 849121 Alternator Overview

Valeo alternator 849121 is a 12-volt, 110-amp replacement built for Nissan charging-system applications that require internal regulation and clockwise rotation. It uses an internal fan, a 6-groove pulley, and an aluminum housing for a direct-fit electrical replacement.

Valeo’s Alternator line draws on the brand’s long history in electrical systems and OE supply. This premium alternator is 100% new, and the design focuses on stable voltage output for Nissan Sentra, Versa, Cube, and NV200 applications.

Key Features

• 12-volt alternator with 110-amp output
• Internal fan and internal regulator
• Clockwise rotation direction
• 6-groove pulley configuration
• Aluminum housing for OE-style fitment
• Technical number: FG12T039
• Part number: 849121

Detailed Description

Valeo 849121 is an alternator for Nissan charging systems that need a 110 AMP unit with internal regulation. It is listed for 2007-2010 Nissan Sentra, 2007-2008 Nissan Versa, 2009 Nissan Versa, 2009-2014 Nissan Cube, and 2013-2014 Nissan NV200, plus 2015 Nissan NV200 build-date-specific applications. The part number 849121 is also associated with technical number FG12T039 for cross-reference and identification.

This alternator is built as a 100% new unit rather than a remanufactured assembly, which helps reduce the risk of early failure tied to worn internal components. For buyers searching for a Nissan Sentra alternator 110 amp, Nissan Versa alternator replacement, or Nissan NV200 charging system part, this Valeo unit matches the listed electrical and pulley specifications.

This part cross-references DENSO Auto Parts 210-4301 for the same application.

What It Helps Fix

• Low charging voltage at the battery
• Battery warning light or charging-system warning
• Dim lights caused by weak alternator output
• Electrical instability from a failing alternator
• Starting issues related to insufficient charging

Installation Notes and Tips

Verify pulley groove count, rotation direction, amperage rating, and regulator type before installation. Confirm the vehicle build date on 2015 Nissan NV200 applications, since the fitment listing includes date-specific coverage. Compare the existing unit to part number 849121 and technical number FG12T039 to confirm the correct replacement.

Quality Assurance

Valeo is a long-established supplier of original equipment electrical components, and this alternator line is positioned as a new replacement built to OE-style specifications. The design reflects Valeo’s charging-system engineering background and focus on stable voltage delivery.