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Specifications
- MFR: BOSCH
- DIM 1: 14mm Dia. Slip Ring
- FEATURE 1: 100% New
- FEATURE 2: Soft start, LRC
- FEATURE 3: OE compliant lamp circuit
- FEATURE 4: Temperature compensation
- NOTE 1: Active lamp function - with output
- SPECS FOR: Bosch IR/IF Alternators
- SPECS: 12 Volt, A-Circuit, L-FR Terminals, 14.5 Vset, w/ LRC
Used On
- Audi (2000-2014)
- Chrysler (2004-2008)
- Mercedes-Benz (2001-2010)
- Porsche (1997-2006)
- Volkswagen (1999-2018)
Replaces
Audi, Volkswagen: 038-903-803, 038-903-803A, 038-903-803B, 038-903-803E, 038-903-803EX, 06F-903-803, 06F-903-803B, 070-903-803B, 070-903-803E, 070-903-803EX, 078-903-803E, 078-903-803EX
Bosch: F 00M 144 136, F 00M 144 154, F 00M 144 175, F 00M 145 200, F 00M 145 209, F 00M 145 225, F 00M 145 261, F 00M 145 296, F 00M 145 315, F 00M 145 337, F 00M 145 341, F 00M 145 350, F 00M 145 384, F 00M 145 396, F 00M 145 397, F 00M 145 862, F 00M 145 876, F 00M 145 891, F 00M A45 232, F 00M A45 300, F 00M A45 303
Mercedes-Benz: 000-154-29-05, 003-154-24-06, 003-154-52-06, 003-154-53-06, 003-154-66-06
Porsche: 000-043-206-37
Lester Numbers
11041, 11042, 11064, 11065, 11130, 11133, 11134, 11209, 11210, 11254, 11360, 11388, 11460, 11463, 12445, 12879, 13810, 13849, 13850, 13851, 13852, 13853, 13884, 13904, 13922, 14001, 20014, 20024, 20149, 20412, 20730, 20731, 20753, 21322, 21323, 21341, 21475, 21476, 21477, 21479, 21480, 21490, 21491, 21570, 22710, 22820, 22821, 22912, 22913, 22948, 22995, 22996, 22998, 23009, 23115, 23205, 23232, 23235, 23255, 23289, 23320, 23321, 23322, 23345, 23346, 23356, 23358, 23360, 23361, 23844, 23845, 23855, 23864, 23865, 23914, 24060, 24090, 27057
Unit Numbers
Audi, Volkswagen: 021 903 026 A, 021 903 026 A, 021-903-025F, 021-903-025H, 021-903-025J, 021-903-025K, 021-903-025L, 021-903-025T, 021-903-026, 021-903-026B, 021-903-026BX, 021-903-026G, 021-903-026GX, 022 903 028 A, 022 903 028 AX, 022-903-028A, 022-903-028B, 022-903-028BX, 023-903-028D, 026 903 015 39, 026 903 015 41, 026 903 015 42, 026 903 015 43, 026 903 015 45, 026-903-015-46, 026-903-015M, 028 903 025 2, 028 903 026 M, 028 903 026 Q, 028 903 028 D, 028 903 028 DX, 028-903-025-4, 028-903-026H, 028-903-026N, 028-903-028C, 028-903-028E, 028-903-029A, 028-903-029N, 028-903-029NX, 028-903-029Q, 028-903-029QX, 028-903-029S, 028-903-029SX, 028-903-030, 028-903-030A, 028-903-031, 029-903-015-42, 029-903-015-43, 029-903-015-45, 030 903 023, 030 903 023 J, 030 903 023 JX, 030 903 023 N, 030-903-023S, 036 903 024 A, 036 903 026, 036 903 026 B, 036-903-024, 036-903-024D, 036-903-024E, 036-903-024EX, 036-903-024J, 036-903-024JX, 036-903-024M, 036-903-024MX, 036-903-024N, 036-903-024P, 036-903-024X, 037 903 025 F, 037 903 025 F, 037 903 026 C, 037 903 026 CX, 037-903-018DX, 037-903-025E, 037-903-025G, 037-903-025H, 037-903-025J, 037-903-025K, 037-903-025L, 037-903-025M, 037-903-025MX, 037-903-026B, 037-903-026BX, 037903025KX, 038 903 018 A, 038 903 018 A, 038 903 018 P, 038 903 018 P, 038 903 018 PX, 038-903-018, 038-903-018B, 038-903-018BX, 038-903-018C, 038-903-018CX, 038-903-018Q, 038-903-018QX, 038-903-018R, 038-903-018RX, 038-903-018X, 038-903-023K, 038-903-023L, 038-903-023P, 038-903-023T, 038-903-024A, 038-903-024B, 038-903-024D, 038-903-024F, 038-903-024SX, 038-903-025, 038-903-025A, 03C-903-023, 03C-903-023D, 03C-903-023DX, 03F 903 023 D, 03F 903 023 DX, 03F 903 023 F, 03F 903 023 FX, 03F-903-023D, 03F-903-023DX, 03L-903-023D, 03L-903-023DX, 03P-903-023C, 03P903023CX, 045-903-023, 045-903-023A, 045-903-023AX, 045-903-023B, 045-903-023C, 045-903-023CX, 045-903-023D, 045-903-023DX, 045-903-023E, 045-903-023EX, 045-903-023F, 045-903-023FX, 045-903-023G, 045-903-023GX, 045-903-023H, 045-903-023HX, 045-903-025B, 045-903-025G, 045903023EX, 048-903-015-4, 048-903-015A, 048-903-017, 048-903-017A, 059 903 015 H, 06A 903 026, 06A 903 026, 06A 903 026 A, 06A 903 026 AX, 06A-903-023-B, 06A-903-023-G, 06A-903-023-GX, 06A-903-023B, 06A-903-023G, 06A-903-023GX, 06A-903-026B, 06B 903 016 AB, 06B 903 016 AB, 06B 903 016 ABX, 06B 903 016 ABX, 06B 903 016 AC, 06B 903 016 AF, 06B 903 016 EX, 06B 903 016 G, 06B 903 016 GX, 06B 903 016 P, 06B 903 016 PX, 06B 903 016 Q, 06B 903 016 QX, 06B 903 019 E, 06B 903 019 EX, 06B-903-016AB, 06B-903-018JX, 06B-903-018RX, 06C 903 016 AX, 06C-903-016, 06C-903-016A, 06C-903-016X, 06D 903 016, 06D 903 016 A, 06D 903 016 X, 06D-903-016AX, 06F-903-023A, 06F-903-023AX, 06F-903-023D, 06F-903-023DX, 06F-903-023F, 06F-903-023FX, 06F-903-023G, 06F-903-023GX, 06F-903-023J, 06F-903-023N, 06F-903-023NX, 06F903023JX, 06F903023L, 06F903023LX, 06J 903 023 C, 06J-903-023C, 070-903-024, 070-903-024, 070-903-024A, 070-903-024B, 070903139, 074 903 018 A, 074 903 018 A, 074 903 018 AX, 074 903 025 S, 074-903-018, 074-903-025J, 074-903-025M, 074-903-025MX, 074-903-025N, 074-903-025N, 074-903-025NX, 074-903-025NX, 074-903-025R, 074-903-025S, 074-903-025T, 074-903-026, 078 903 018 A, 078-903-016AB, 078-903-016S, 078-903-016SX, 078-903-018AX, 078-903-018X, 078-903-025K, 07K-903-023A, 07K-903-023AX, 07K-903-023C, 07K-903-023CX, 2R0 903 015 E, 2R0-903-015-D, 2S0 903 015, 2T0 903 015, 377-903-015H, 377-903-015J, 377-903-015N, 4Z7-903-015, 4Z7-903-015, 6QE 903 015 A, 6QE-903-015
Bosch: 0 120 000 017, 0 120 000 037, 0 124 215 006, 0 124 215 008, 0 124 215 009, 0 124 225 012, 0 124 225 032, 0 124 225 040, 0 124 315 001, 0 124 315 002, 0 124 315 003, 0 124 315 004, 0 124 315 005, 0 124 315 006, 0 124 315 007, 0 124 315 008, 0 124 315 012, 0 124 315 013, 0 124 315 018, 0 124 315 020, 0 124 315 021, 0 124 315 022, 0 124 315 030, 0 124 315 031, 0 124 315 032, 0 124 315 035, 0 124 315 036, 0 124 315 037, 0 124 315 038, 0 124 315 039
Features & Benefits
- Precision aftermarket replacement part
- Regulates alternator output voltage
- Helps maintain proper battery charging
- Supports stable charging system performance
- Manufactured to match original specifications
- Designed for dependable long-term operation
- Ideal for alternator rebuilding and repair
- Cross-referenced to OEM and aftermarket part numbers
What Does a Voltage Regulator Do?
The voltage regulator controls the alternator's output by regulating current supplied to the rotor field winding. As electrical demand changes, the regulator continuously adjusts field current to maintain the proper charging voltage for the battery and the vehicle's electrical system.
A properly functioning voltage regulator helps prevent battery overcharging and undercharging while protecting sensitive electrical components from excessive voltage. Because charging system performance depends on the interaction between the regulator, rotor, stator, rectifier, and battery, replacing a faulty regulator is an important step in restoring alternator performance.
Common Signs Replacement Is Needed
Replace the voltage regulator if you notice:
- Battery overcharging
- Battery not charging
- Low charging voltage
- High charging voltage
- Battery warning light illuminated
- Intermittent charging problems
- Headlights that brighten or dim with engine speed
- Charging system failure during testing
- Voltage regulator failure discovered during alternator rebuilding
Installation Recommendations
Installation should be performed by a qualified technician or experienced alternator rebuilder. Before installing the new regulator, inspect the brushes, brush holder, slip rings, rotor, stator, rectifier, wiring, and electrical connections for signs of wear or damage.
Always verify connector configuration and mounting style before installation. After assembly, bench-test the alternator to confirm proper charging voltage and overall charging system performance.
While You're Rebuilding
Inspect other common wear components to help maximize charging system reliability:
Why Buy From RC Auto Electric?
RC Auto Electric specializes in alternator and starter rebuilding components for professional rebuilders, repair shops, automotive technicians, and DIY enthusiasts. Our extensive catalog includes thousands of OEM and aftermarket electrical components backed by accurate cross-reference information to help simplify part identification and reduce ordering mistakes.
Disclaimer
Compatibility information is provided as a reference only. Manufacturing revisions, production changes, and previous rebuilding modifications may affect internal alternator components. Always compare the original part, connector configuration, mounting style, voltage specifications, cross-reference numbers, and product photographs before installation. If you are unsure about compatibility, contact RC Auto Electric before ordering.
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