Best Automotive Replacement Alternator Diodes in 2026
Daisy
Last Updated: Jul 19, 2026
Daisy
Last Updated: Jul 19, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| OEG Parts | 9.80 | ✅ | ✅ | ✅ |
Replacement Part Numbers: 2-08437, 40014106, 400-14106, 4R3T10300AA, 4R3T-10300-AA, 4R3T10300AB, 4R3T-10300-AB, 4R3TAA, 4R3T-AA, 4R3TAB, 4R3T-AB, 4R3Z10346AA, 4R3Z-10346-AA, 6R3TCB, 6R3T-CB, 6R3Z10346A, 6R3Z-10346-A, 6R3Z10346AARM, 6R3Z-10346-AARM, 6R3Z10346ARM, 6R3Z-10346-ARM, 6R3Z10346BRM, 6R3Z-10346-BRM, 6R3Z10V346AARM, 6R3Z-10V346-AARM, 8437, 8437N, AFD0117, RM6R3T10300CE, RM6R3T-10300-CE, 208437
Product Type: Alternator; Condition: New; Voltage: 12V; Amperage: 135A; Rotation: CW; Regulator/Fan: IR/IF; Pulley Class: S6; Mounting Hardware Included: No; Unit Finish: Same as OE; Number of Pieces: 1; Country of Origin: CN
Brand New - Manufactured With New Premium Quality Components - Engineered To Meet Or Exceed OEM Specifications - All Items Tested For Reliability, Durability And Performance
One Year Hassle Free Guarantee
See Product Description for Fitment Chart
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| OEG Parts | 9.81 | ✅ | ✅ | ✅ |
Replacement Part Numbers: 2-07791, 3211772, 321-1772, 3342274, 334-2274, 40014033, 400-14033, 40014033R, 400-14033R, 40014121, 400-14121, 40014138, 400-14138, 7791, 7791N, 97082211, AFD0035, F6PZ10346KARM, F6PZ-10346-KARM, F75U10300CA, F75U-10300-CA, F75U10300CB, F75U-10300-CB, F75UCA, F75U-CA, F75UCB, F75U-CB, F7PU10346KA, F7PU-10346-KA, F7PZ10346KA, F7PZ-10346-KA, F7PZ10346KARM, F7PZ-10346-KARM, F7PZ10346KARM1, F7PZ-10346-KARM1, F7PZ10346KARM2, F7PZ-10346-KARM2, F7UU10300BB, F7UU-10300-BB
Product Type: Alternator; Condition: New; Unit Series: 3G; Voltage: 12V; Amperage: 130A; Rotation: CW; Regulator/Fan: IR/IF; Plug Code: 330; Pulley Class: S8; Pulley OD: 59mm; Mounting Hardware Included: No; Unit Finish: Same as OE; Number of Pieces: 1; Country of Origin: CN
Compatible With Ford Expedition XLT 5.4L 1997-02; F-150 Base 4.6L 1997-00; F-150 Lariat, XL, XLT 4.6L 1997-03; F-150 Lariat, XL, XLT 5.4L 1997-03 - See the Description for more Applications
One Year Hassle Free Guarantee
Additional Part Numbers: F7UU10300BC, F7UU-10300-BC, F7UU10300CB, F7UU-10300-CB, F7UUBB, F7UU-BB, F7UUBC, F7UU-BC, F7UUCB, F7UU-CB, 207791
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Xislet Auto Parts | 9.85 | ✅ | ✅ | ✅ |
Farewell to thinner wires and cheaply made, this alternator pigtail was made of quality wires (The white wire is 14 gauge and the red one is 10 gauge)
Build in the cross linked polyethelene high temperature TXL with 100% copper wires, replace it with this pigtail to make a good connection on the alternator
Plug and play, easy to replace the old frayed connector, there is plenty of lead length to make your repair or connection
This alternator pigtail generally fits AMC, Buick, Cadillac, Checker, Chevrolet, GMC, International Harvester, Jeep, Olds mobile, Pontiac vehicles
This pigtail connector for the alternator may fit other models and applications, For additional product information please refer to items specifics or contact us
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
100% newly manufactured as an exact replacement for your GM vehicle’s original alternator
Components are tested to meet original specification requirements for remarkable durability
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specifications for fit, form, and function
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Remanufactured using consistent quality processes; not just rebuilt
Alternators use high-quality bearings with high-temp lubricant and double-lipped rubber seals, reducing friction, vibration, and noise
Rotors and stators are electronically tested and then sealed with secondary insulating coating to help prevent shorts
Performance-tested and inspected to ensure they meet your expectations for quality design and component specifications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| OEG Parts | 9.81 | ✅ | ✅ | ✅ |
Replacement Part Numbers: 2-08472, 3342538, 334-2538, 3342668A, 334-2668A, 3W1U10300BB, 3W1U-10300-BB, 3W1UBB, 3W1U-BB, 3W1Z10346BA, 3W1Z-10346-BA, 3W1Z10346BARM, 3W1Z-10346-BARM, 3W1Z10346CA, 3W1Z-10346-CA, 3W1Z10V346BBRM, 3W1Z-10V346-BBRM, 40014055, 400-14055, 40014055R, 400-14055R, 40014083, 400-14083, 5W1T10300AB, 5W1T-10300-AB, 5W1TAB, 5W1T-AB, 5W1Z10346AA, 5W1Z-10346-AA, 6U2Z10V346DERM, 6U2Z-10V346-DERM, 6W1TAA, 6W1T-AA, 6W1Z10346AA, 6W1Z-10346-AA, 6W1Z10346AARM, 6W1Z-10346-AARM
Product Type: Alternator; Condition: New; Voltage: 12V; Amperage: 135A; Rotation: CW; Regulator/Fan: IR/IF; Pulley Class: S6; Mounting Hardware Included: No; Unit Finish: Same as OE; Number of Pieces: 1; Country of Origin: CN
Compatible With Ford Crown Victoria Police Interceptor 4.6L 2003-05; Compatible With Lincoln Town Car Signature 4.6L 2003-07; Town Car Signature Limited 4.6L 2005-11; Compatible With Mercury Grand Marquis GS, LS 4.6L 2005-07 - See the Description for more Applications
One Year Hassle Free Guarantee
Additional Part Numbers: 6W1Z10346ABRM, 6W1Z-10346-ABRM, 6W1Z10346ACRM, 6W1Z-10346-ACRM, 6W1Z10V346AARM, 6W1Z-10V346-AARM, 6W1Z10V346ABRM, 6W1Z-10V346-ABRM, 8315, 8315N, 8472, AFD0098, AFD0141, RM6W1T10300AD, RM6W1T-10300-AD, 208472
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Direct replacement for a proper fit every time
Rust resistant
Made of high quality steel
Dorman's Alternator bolts are constructed to strict engineering quality standards
Support available - every Dorman part is backed by Dorman's ASE Blue Seal Certified technical support team
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Speedway Motors | 9.81 | ❌ | ❌ | ❌ |
Ready to plug into '73 & up GM internally regulated alternator
Special diode prevents engine run on so you do not have to upgrade to a more modern ignition switch when upgrading to an alternator
Diode is pre-installed and protected with heat shrink
Plug and play
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| OEG Parts | 9.80 | ✅ | ✅ | ✅ |
Replacement Part Numbers: 10464402, 10464407, 10480308, 10480342, 10480343, 3211418, 321-1418, 3211746, 321-1746, 3211751, 321-1751, 3342486, 334-2486, 3342486A, 334-2486A, 40012242, 400-12242, 82425, 8242-5, 8242N, 90014364, 90-01-4364, ADR0182, 10464070
Product Type: Alternator; Condition: New; Unit Series: CS130D; Voltage: 12V; Amperage: 102A; Rotation: CW; Regulator/Fan: IR/IF; Plug Code: 313; Pulley Class: S6; Mounting Hardware Included: No; Unit Finish: Same as OE; Number of Pieces: 1; Country of Origin: CN; Notes: PRESSFIT DIODES
Brand New - Manufactured With New Premium Quality Components - Engineered To Meet Or Exceed OEM Specifications - All Items Tested For Reliability, Durability And Performance
One Year Hassle Free Guarantee
See Product Description for Fitment Chart
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Aokus | 9.84 | ✅ | ✅ | ✅ |
▲Delco alternator 10Si and 12Si alternator excit wire plug with diode
▲Ready to plug into '73 & up GM internally regulated alternator
▲Special diode prevents engine run and voltage feedback
▲White wire length: 100CM; Red wire length: 20CM
▲QUALITY ASSURANCE - Made of high quality material ,our wire plugis durable and can be used for a long time.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| ❌ | ❌ | ❌ |
FITMENT | For 1976-1986 Jeep CJ
OE REFERENCE | 8125177
OMIX 17226.03 | Alternator Diode Trio
WARRANTY | Limited 5-Year Warranty
OMIX | Proudly offering all the parts you need to keep your Jeep running like new with quality standards that always meet or exceed those of the factory part.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| OEG Parts | 9.81 | ✅ | ✅ | ✅ |
Replacement Part Numbers: 2C3U-10300-CB, 2C3U10300CC, 2C3U-10300-CC, 2C3UCB, 2C3U-CB, 2C3UCC, 2C3U-CC, 2C3Z10346CA, 2C3Z-10346-CA, 2C3Z10346CARM, 2C3Z-10346-CARM, 2C3Z10346CB, 2C3Z-10346-CB, 2C3Z10V346CBRM, 2C3Z-10V346-CBRM, 2C3Z10V346CCRM, 2C3Z-10V346-CCRM, 3351158, 335-1158, 8317, 8317N, 90025124, 90-02-5124, AFD0108, 2C3U10300CB
Product Type: Alternator; Condition: New; Unit Series: 6G; Voltage: 12V; Amperage: 110A; Rotation: CW; Regulator/Fan: IR/IF; Plug Code: 336; Pulley Class: S8; Pulley OD: 69mm; Country of Origin: CN; Notes: AVALANCHE DIODES
Compatible With Ford F-250 Super Duty Lariat, XL, XLT 7.3L 2002-03; F-350 Super Duty Lariat, XL, XLT 7.3L 2002-03; F-550 Super Duty XL, XLT 7.3L 2002-03 - See the Description for more Applications
One Year Hassle Free Guarantee
See Product Description for Additional Specifications
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Parts Player | 5 |
| Acdelco | 2 |
| Dorman | 1 |
| Ibvibv | 1 |
| Omix-Ada | 1 |
| Speedway Motors | 1 |
| Xislet | 1 |
We've carried out a comprehensive analysis of 2,515 reviews on automotive replacement alternator diodes, using our selection criteria to identify the best options in the categories. Our findings reveal that most customers typically select automotive replacement alternator diodes priced around $74.10, with top brands including and
Our team of expert editors reviewed these high-quality items and handpicked the top 12 automotive replacement alternator diodes for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the categories category. These include and .
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