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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.
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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