Product Overview
The JFZ1621-2 / A7T02471 / 31400-82C30 is a Suzuki OE-spec replacement alternator delivering 12V 50A output with a 4-rib (4PK) pulley, designed for Suzuki compact petrol models using this alternator family. This aftermarket unit matches the original charging-system specification for small-displacement Suzuki platforms with modest factory electrical loads.
Fitted with internal regulator design, this brand-new alternator is stocked in-house with a 1-year warranty and 10-day dispatch lead-time. The 50-amp rating is factory-correct for stock electrical loads of these compact powertrains, supporting standard lighting, ignition and factory audio equipment.
Key physical specs: net weight 3.9 kg, gross weight 4.15 kg, overall dimensions 240 x 180 x 170 mm, supplied inside neutral kraft inner carton.
The 50A Charging System and Fitment Verification
This alternator serves Suzuki compact models that use the 12V 50A 4PK charging system. Because the original page does not specify a single vehicle model, correct fitment must be verified against the original alternator on the vehicle rather than assumed from the vehicle name.
It is critical to compare the pulley groove count, pulley diameter, mounting hole spacing and terminal layout between the new and old units before ordering. Alternators for different engine families such as J20 and M16 cannot be mixed; a mismatched pulley will cause belt drive failure.
The 4-rib pulley must match the original accessory-belt layout of the vehicle. Installing a pulley with the wrong rib count will cause belt mis-tracking, slippage, premature belt wear and charging faults. Always cross-check against your old alternator before ordering.
Technical Specifications
| Parameter | Specification |
|---|
| Suzuki OE numbers | 31400-82C30, 31400-60B11, 31400-60BA0, 31400-60V40, 31400-80E00 |
| Reference/OEM cross | JFZ1621-2, A7T02471, A7T02471A, UD11171A |
| Voltage | 12V |
| Amperage | 50A |
| Pulley | 4-rib fixed pulley (4PK) |
| Regulator | Internal |
| Engine | Suzuki compact petrol models (confirm engine code) |
| Quality | NEW |
| Warranty | 1 year |
| Net Weight | 3.9kg |
| Gross Weight | 4.15kg |
| Dimensions | 240 x 180 x 170mm |
| Packaging | Neutral kraft box |
| Lead Time | 10 days, in stock |
Engine Compatibility and Cross Reference
This alternator fits Suzuki vehicles that use the 12V 50A 4PK alternator family. Do not rely solely on vehicle model name for fitment validation; always verify engine code, old-part OE number, pulley rib-count, pulley diameter and amp label on your original alternator.
| Vehicle | Engine Code | Notes |
|---|
| Suzuki compact models | Confirm engine code | Verify 4PK, 50A and mounting layout |
Multiple Suzuki OE numbers appear across production batches and regional market specifications for this same alternator family. If your original unit bears one of the listed cross-reference numbers, this alternator serves as a direct drop-in replacement.
What to Look for in a Replacement
Follow these five verification steps before placing your order to avoid wrong-part returns:
1. Check the amperage label on your old alternator: confirm it is rated for 50A. Different amp ratings are not interchangeable.
2. Count pulley ribs and measure pulley diameter: this unit requires 4PK. A mismatched pulley will cause belt drive failure.
3. Confirm mounting hole spacing and terminal layout match your original unit.
4. Match against OE / reference part numbers stamped on your original housing.
5. Weight cross-check: genuine matching unit weighs approximately 3.9 kg net; significant weight difference indicates wrong assembly.
Application Scenarios
Independent repair shops and Suzuki specialist garages servicing compact Suzuki models across Europe, Oceania, Asia-Pacific and Latin-American markets.
Parts counters and jobbers stocking Japanese vehicle replacement electrical components for compact cars.
Vehicle owners restoring and maintaining original-spec Suzuki compact models.
Used-car export traders supplying pre-owned Suzuki vehicles to global secondary markets.
Hobbyists with lightly modified vehicles retaining factory-style electrical systems.
Note: For vehicles with heavy aftermarket upgrades such as multiple auxiliary lights, high-watt audio or additional accessories, evaluate whether an upgraded high-output alternator will be required instead of this stock-spec 50A unit.
FAQ
Q: Which Suzuki models does this alternator fit?
A: It fits Suzuki compact petrol models that use the 12V 50A 4PK alternator family. Because the fitment is not limited to a single model, always verify against the OE number, pulley and mounting layout of your original alternator before ordering.
Q: Can I fit this alternator onto a Suzuki with a J20 or M16 engine?
A: Not necessarily. Alternators for different engine families such as J20 and M16 cannot be mixed; the pulley and mounting layout must match. Confirm engine code and old alternator specification before ordering.
Q: My old alternator shows OE number 31400-60B11 or 31400-80E00, will 31400-82C30 work?
A: Yes. These numbers belong to the same alternator family, differing only by production revision and market specification. It serves as a direct replacement.
Q: What is the normal charging voltage after installation?
A: With the engine running at idle, battery terminal voltage should read 13.5V-14.5V and remain stable.
Q: What is your warranty and lead-time?
A: Goods are in stock with a 10-day dispatch lead-time. A 1-year warranty applies from installation date; warranty excludes damage caused by mis-installation, wrong belt tension, or vehicle-wiring faults.
In Practice
For technicians working on Suzuki compact platforms: Before removing the existing alternator, perform charging-system diagnostics. Measure battery terminal running voltage with a multimeter. Weak batteries, corroded ground connections or a faulty main harness can mimic alternator failure symptoms. Turn off the ignition and remove the key, wait for the engine compartment to cool (more than 30 minutes if hot), then disconnect the negative battery cable first.
Compare the pulley size and terminal positions of the new and old units before installation, and clean oil and rust from the mounting bracket and terminals. Place the new alternator, align with the bracket positioning holes, and install the mounting and pivot bolts without fully tightening them. Connect the B+ terminal first, tightening the nut to about 8-10 N-m, then insert the wiring harness connector and lock the buckle. Fit the belt following the old belt routing, pry the tensioner smoothly, and release it slowly; belt deflection should be 1-2 cm when pressed at mid-span. Tighten bolts to the torque specified in the vehicle manual (for example, pivot bolt torque around 22-25 N-m for some models), then recheck belt tension.
After reconnecting the battery, start the engine and verify the charging indicator turns off and output voltage stays stable at 13.5V-14.5V at idle, with no abnormal noise. Reusing old bolts: check thread integrity; Suzuki models mostly use fine-thread bolts, never substitute coarse-thread bolts. For aluminium brackets, reduce torque about 20% compared with cast iron brackets. Never reverse polarity or short-circuit terminals to test, as this will burn the regulator and rectifier. Inexperienced home mechanics are recommended to entrust this work to a qualified auto-electric repair shop.
References
Installation specifications are compiled from official maintenance manuals for multiple Suzuki models (covering battery disconnection order, bolt torque standards and belt tension adjustment) combined with practical experience from automotive repair platforms and general 12V alternator service knowledge. Verified against actual vehicle installation tests and after-sales maintenance experience.
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