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Bosch AL9378X Alternator
| Brand | Bosch AL9378X |
|---|---|
| Amperage Rating | 90 |
| Case Color | Aluminum |
| Case Material | Aluminum |
| External Fan Included | No |
| External Regulator Included | No |
| Fan Type | Internal |
| New Or Remanufactured | Remanufactured |
| One Wire Capable | No |
| Original Equipment Manufacturer Names | MI |
| Outside Pulley Diameter | 56 |
| Plug Clock Rear View Main Mounting Ear at 6 O Clock | 7 |
| Private Brand? | No |
| Pulley Groove Quantity | 4 |
| Pulley Included | Yes |
| Pulley Type | 4S |
| Pulley Type / Belt Type (Alternator) | 4S |
| Regulator Type | Internal |
| Rotation Direction | Clockwise |
| Voltage | 12 |
| Product line | Alternator (Remanufactured) |
| Fits | Smart · 8 vehicles |
Remanufactured unit. Built and tested for dependable performance and reliability.
Internal regulation. Integrated regulator and fan simplify the charging system.
Aluminum case. Lightweight construction helps resist corrosion.
Cross-references 1321540001 for the same application. See all 1.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Bosch Remanufactured Alternator for Smart Fortwo
This Bosch remanufactured alternator is built for 12-volt charging systems and is engineered for reliable electrical output in the 2008-2015 Smart Fortwo. Bosch Premium Alternators are remanufactured, tested, and configured for consistent performance in daily driving conditions.
Key Features
- Remanufactured Bosch alternator for charging-system replacement
- 12-volt unit with 90-amp output rating
- Internal fan and internal regulator design
- Clockwise rotation
- Includes pulley with 4-groove belt configuration
- Aluminum case and aluminum case material
- Rear plug clock position: 7 o’clock, main mounting ear at 6 o’clock
- Fits 2008-2015 Smart Fortwo
- Part number AL9378X
Product Details
Bosch AL9378X is a remanufactured alternator designed for the Smart Fortwo charging system. It uses an internal regulator, internal fan, and a 4-groove pulley to match the specified belt drive setup. The aluminum housing supports a lightweight, OE-style replacement format, while the 90-amp rating provides the electrical output needed to keep the battery charged and vehicle systems operating properly. This part cross-references 1321540001 for the same application.
Common Charging Problems It Can Help Resolve
- Battery warning light caused by alternator output loss
- Low charging voltage at idle or under electrical load
- Dim lights or unstable electrical performance
- Battery drain from a failing charging system
- Noise or wear related to a worn alternator assembly
Installation Notes and Tips
Verify the pulley groove count, plug orientation, mounting ear position, and clockwise rotation before installation. Confirm the vehicle uses the 12-volt charging system specified for this application. For best results, inspect the drive belt, belt tension, battery condition, and charging connections during replacement. Fits 2008-2015 Smart Fortwo, N/A.
Quality Assurance
Bosch Premium Alternators are remanufactured and tested to support dependable performance and reliability. Part number AL9378X is built to Bosch specifications for the listed Smart Fortwo application.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2015 | Smart | Fortwo | 1.0L | L3 | N/A | Alternator (Remanufactured) |
| 2014 | Smart | Fortwo | 1.0L | L3 | N/A | Alternator (Remanufactured) |
| 2013 | Smart | Fortwo | 1.0L | L3 | N/A | Alternator (Remanufactured) |
| 2012 | Smart | Fortwo | 1.0L | L3 | N/A | Alternator (Remanufactured) |
| 2011 | Smart | Fortwo | 1.0L | L3 | N/A | Alternator (Remanufactured) |
| 2010 | Smart | Fortwo | 1.0L | L3 | N/A | Alternator (Remanufactured) |
| 2009 | Smart | Fortwo | 1.0L | L3 | N/A | Alternator (Remanufactured) |
| 2008 | Smart | Fortwo | 1.0L | L3 | N/A | Alternator (Remanufactured) |
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