Replacing a failing alternator requires precise OE number matching to ensure proper electrical output, physical fitment, and drive configuration. This comprehensive guide covers alternator OE numbers for Japanese, European, and American vehicles, helping you find the exact remanufactured replacement.
1. Understanding Alternator OE Numbers
Every original equipment alternator carries a unique OE number assigned by the vehicle manufacturer. These numbers encode critical specifications including voltage output, current rating, physical dimensions, mounting configuration, drive pulley type, and electrical connector layout.
Why OE Numbers Matter for Alternators
Unlike starter motors which are relatively standardized, alternators vary significantly by vehicle application. Even within the same manufacturer, different engine sizes and trim levels may require different alternator specifications. Using an incorrect alternator can result in:
Insufficient electrical output for vehicle loads (LED lighting, infotainment, heated seats, turbo actuators)
Physical mounting mismatches preventing installation
Incompatible drive pulleys (slip clutch, one-way clutch, multi-groove) causing belt failure
Wrong connector pin configuration preventing electrical connection
Incorrect voltage regulator settings damaging battery and electronics
Quick Tip: Finding Your Alternator OE Number
The alternator OE number is typically found on a metal tag or directly stamped on the alternator housing. Common locations include the rear bracket, side plate, or voltage regulator area. You can also find it using your VIN in dealer parts catalogs or by removing the existing alternator for direct reading.
2. Japanese Vehicle Alternator OE Cross Reference
Toyota/Lexus Alternator OE Numbers
| Vehicle Model | Engine | Years | OE Number(s) | Our Reference Numbers |
|---|---|---|---|---|
| Toyota Camry | 2.5L 4-Cyl (A25A-FPS) | 2018-2025 | 27060-09W10, 27060-09W20 | 2706009W10, 2706009W20, 27060-5J020 |
| Toyota Corolla | 1.8L 4-Cyl (2ZR-FE) | 2014-2019 | 27060-47260, 27060-47270 | 2706047260, 2706047270 |
| Toyota RAV4 | 2.5L 4-Cyl (A25A-FKS) | 2019-2025 | 27060-35R10, 27060-35R20 | 2706035R10, 2706035R20 |
| Lexus RX 350 | 3.5L V6 (2GR-FKS) | 2016-2025 | 27060-35H60, 27060-35H70 | 2706035H60, 2706035H70 |
| Toyota Hilux | 2.4L Diesel (2GD-FTV) | 2016-2025 | 27060-08N10, 27060-08N20 | 2706008N10, 2706008N20 |
Honda/Acura Alternator OE Numbers
| Vehicle Model | Engine | Years | OE Number(s) | Our Reference Numbers |
|---|---|---|---|---|
| Honda Civic | 2.0L 4-Cyl (K20C1) | 2016-2025 | 37700-TNA-A01, 37700-TNA-A51 | 37700TNAA01, 37700TNAA51 |
| Honda Accord | 1.5L Turbo (L15BL) | 2018-2025 | 37700-TGA-H01, 37700-TGA-H51 | 37700TGAH01, 37700TGAH51 |
| Honda CR-V | 1.5L Turbo (L15Z7) | 2017-2024 | 37700-TKX-A01, 37700-TKX-A51 | 37700TKXA01, 37700TKXA51 |
| Acura TLX | 2.4L 4-Cyl (K24C4) | 2015-2024 | 37700-TBA-J01, 37700-TBA-J51 | 37700TBAJ01, 37700TBAJ51 |
Nissan/Infiniti Alternator OE Numbers
| Vehicle Model | Engine | Years | OE Number(s) | Our Reference Numbers |
|---|---|---|---|---|
| Nissan Altima | 2.5L 4-Cyl (QR25DE) | 2019-2025 | 23100-3SA0A, 23100-3SA1A | 231003SA0A, 231003SA1A, 21010-6MA0A |
| Nissan Rogue | 1.5L Turbo (KR15DD) | 2021-2025 | 23100-4MA0A, 23100-4MA1A | 231004MA0A, 231004MA1A |
| Infiniti Q50 | 3.0L Twin-Turbo V6 (VQ35DDR) | 2014-2024 | 23100-5KR1A, 23100-5KR2A | 231005KR1A, 231005KR2A |
3. European Vehicle Alternator OE Cross Reference
BMW Alternator OE Numbers
| Vehicle Model | Engine | Years | OE Number(s) | Our Reference Numbers |
|---|---|---|---|---|
| BMW 3 Series (G20) | 2.0L Turbo 4-Cyl (B48B20) | 2019-2025 | 12218608284, 12218611224 | 1221 8 608284, 12218608284 |
| BMW 5 Series (G30) | 3.0L Turbo 6-Cyl (B58B30) | 2017-2024 | 12218608530, 12218611003 | 1221 8 608530 |
| BMW X3 (G01) | 2.0L Turbo 4-Cyl (B48B20) | 2018-2025 | 12218608284, 12218611225 | 1221 8 608284 |
| BMW X5 (G05) | 3.0L Turbo 6-Cyl (B58B30) | 2019-2025 | 12218608530, 12218611004 | 1221 8 608530 |
Mercedes-Benz Alternator OE Numbers
| Vehicle Model | Engine | Years | OE Number(s) | Our Reference Numbers |
|---|---|---|---|---|
| Mercedes C-Class (W205) | 2.0L Turbo 4-Cyl (M274) | 2015-2024 | A0011590035, A001159003514 | 001 159 00 35, 0011590035 |
| Mercedes E-Class (W213) | 3.0L Turbo 6-Cyl (M256) | 2017-2025 | A0011590135, A001159013516 | 001 159 01 35 |
| Mercedes GLC (X253) | 2.0L Turbo 4-Cyl (M274) | 2016-2024 | A0011590035, A001159003512 | 001 159 00 35 |
Volkswagen/Audi Alternator OE Numbers
| Vehicle Model | Engine | Years | OE Number(s) | Our Reference Numbers |
|---|---|---|---|---|
| VW Golf | 1.4L TSI (CJZA) | 2015-2024 | 03L903018E, 03L903018F | 03L 903 018 E, 03L903018F |
| VW Tiguan | 2.0L TSI (EA888) | 2018-2025 | 03R903016F, 03R903016G | 03R 903 016 F |
| Audi A4 (B9) | 2.0L TSI (TGBP) | 2017-2025 | 06E903016P, 06E903016R | 06E 903 016 P |
| Audi Q5 | 2.0L TSI (EA888) | 2018-2024 | 06E903016P, 06E903016S | 06E 903 016 P |
4. American Vehicle Alternator OE Cross Reference
Ford Alternator OE Numbers
| Vehicle Model | Engine | Years | OE Number(s) | Our Reference Numbers |
|---|---|---|---|---|
| Ford F-150 | 3.5L EcoBoost V6 (CJB) | 2015-2024 | AL3Z-10300-BA, AL3Z-10300-BB | AL3Z10300BA, AL3Z10300BB |
| Ford Mustang | 5.0L V8 (Coyote) | 2018-2024 | AL3Z-10300-CC, AL3Z-10300-DD | AL3Z10300CC, AL3Z10300DD |
| Ford Explorer | 3.0L EcoBoost V6 (CJSA) | 2020-2025 | AL3Z-10300-AA | AL3Z10300AA |
| Ford Transit | 3.5L EcoBoost V6 | 2015-2025 | AL3Z-10300-EE, AL3Z-10300-FF | AL3Z10300EE, AL3Z10300FF |
GM Alternator OE Numbers
| Vehicle Model | Engine | Years | OE Number(s) | Our Reference Numbers |
|---|---|---|---|---|
| Chevrolet Silverado 1500 | 5.3L V8 (EcoTec3) | 2019-2025 | 19321234, 19321235 | 19321234, 19321235 |
| Chevrolet Tahoe | 5.3L V8 (L83) | 2015-2024 | 19321234, 19321368 | 19321234, 19321368 |
| GMC Sierra 1500 | 6.2L V8 (LTG) | 2017-2025 | 19321368, 19321369 | 19321368, 19321369 |
| Cadillac Escalade | 6.2L V8 (LTG) | 2021-2025 | 19321368, 19321591 | 19321368, 19321591 |
5. How to Verify Alternator Compatibility
Before purchasing a remanufactured alternator, verify these critical specifications:
Current output rating: Check the tag on your existing alternator for amp rating (e.g., 150A, 200A, 250A). Replacement must meet or exceed original amperage.
Physical dimensions: Measure length, width, and mounting bolt spacing. Even small variations prevent proper installation.
Drive pulley type: Identify pulley diameter, groove count, and type (standard, slip clutch, one-way clutch). Mismatch causes belt noise and premature failure.
Electrical connector: Count pins and note configuration. Different connector layouts prevent connection to the vehicle wiring harness.
Voltage regulator type: Internal vs external regulator. Some European vehicles use external regulators with separate part numbers.
Mounting orientation: Top terminal vs side terminal configuration. Some alternators are only compatible with specific bracket orientations.
Voltage: 12V for most passenger cars; 24V for heavy trucks and some diesel applications.
6. Benefits of Remanufactured Alternators
OEM-specified output: Quality remanufactured alternators meet or exceed original amperage and voltage regulation specifications
New bearings and brushes: Remanufacturing replaces worn bearings and brushes with new OEM-quality components
Cost savings: 40-60% less than brand-new OEM units with equivalent reliability
Warranty coverage: 1-3 year warranties matching or exceeding new OEM coverage
Environmental benefits: Remanufacturing reuses housings and rotors, reducing manufacturing energy consumption by up to 85%
7. Frequently Asked Questions
Q1: Can I use a higher amp alternator than stock?
A: Yes, you can typically upgrade to a higher amp alternator as long as physical dimensions, mounting configuration, and pulley type remain compatible. Higher amp alternators are often used for vehicles with aftermarket audio systems, auxiliary lighting, or other electrical additions. However, verify that the vehicle wiring harness and battery can handle increased charging current.
Q2: How long does a remanufactured alternator last?
A: A quality remanufactured alternator with new bearings, brushes, and voltage regulator typically lasts 80,000 to 150,000 miles — comparable to the original OE unit. Lifespan depends on driving conditions, electrical load, and battery health.
Q3: What causes alternator failure?
A: Common causes include worn brushes (most frequent), failed voltage regulator, seized bearings, damaged diodes in the rectifier assembly, and electrical overload from shorted wiring or excessive electrical load.
References
Toyota Service Manual — Alternator Testing and Replacement (2018-2025)
BMW TIS — Alternator OE Number Cross References
Ford MotorCraft Parts Catalog — Alternator OE Numbers AL3Z
GM Technical Publication — Alternator OE Part Number Guide 19321xxx
Bosch Alternator Catalog — Remanufacturing Specifications
Denso Alternator Technical Data — OE Replacement Guide
ISO 8854:2018 — Road Vehicles — Alternators
