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  • OEM Valeo Voltage Regulator M603
OEM Alternator Voltage Regulator M603, aftermarket replacement, starter parts, alternator parts, automotive electrical
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OEM Valeo Voltage Regulator M603

Valeo
M603OEM
In stock
Voltage Regulator
$90.00
OEM Valeo Voltage Regulator M603

Shipping

In-stock orders ship out same day or next business day via USPS.

Pre Order

Pre-orders ship out in the order received within 7–21 business days.

Customer Support

Need help finding a part? Contact Support@RCAutoElectric.com

Description

Specifications

  • MFR: VALEO
  • FEATURE 1:100% New 
  • FEATURE 2:LIN (COM) Regulator
  • FEATURE 3:COM ID Code: 25
  • SPECS FOR:Valeo IR/IF Alternators
  • SPECS:12 Volt, B-Circuit, 14.3 Vset, LIN-Bus Terminals

USED ON

  • Audi (2011-2013)

Replaces

  • Valeo 599119, 599340

LESTER NUMBERS

  • 11319, 11721, 11810, 20147, 20148, 20350

UNIT NUMBERS

  • Audi, Volkswagen 03C 903 023 T, 03C 903 023 TX, 03C-903-023-T, 03D-903-025-M, 03D-903-025-MX, 03D-903-025M, 03D-903-025MX, 03L-903-023-A, 03L-903-023-AX, 03L-903-023A, 03L-903-023AX, 03P-903-023-A, 03P-903-023-B, 03P-903-023-BX, 03P-903-023A, 03P-903-023B, 03P-903-023BX, 059 903 016 G, 059-903-016-G, 06H-903-017-E, 06H-903-017-EX, 06H-903-017E, 06H-903-017EX, 06H-903-018X, 06H-903-023-E, 06H-903-023-EX, 06J-903-023-N, 06J-903-023-NX; Bosch 0 986 083 530; Original Reference Number A609874A; Valeo 2611257A, TG14C019, TG14C022, TG14C028, TG14C031, TG14C035, TG14C037, TG14C039

Vehicle Application

Audi Car
TT Quattro L4 2.0L 1984cc 121cid 2012-2013
TT Quattro L4 2.0L 1984cc 121cid CETA 2011
TTS Quattro L4 2.0L 1984cc 121cid 2011-2013

Audi - Europe Car
A1 CAXA, 1390cc, 1.4 TFSI 2010-2016
A1 CNVA, 1390cc, 1.4 TFSI 2010-2016
A1 (8X1, 8XK) Eng.CAXA, CNVA 1.4 TFSI 90kW CAXA, CNVA 2010
A1 Sportback (8XA, 8XF) Eng.CAXA, CNVA 1.4 TFSI 90kW CAXA, CNVA 2011
A3 CAXC, 1390cc, 1.4 TFSI 2009-2016
A3 CMSA, 1390cc, 1.4 TFSI 2009-2016
A3 (8P1) Eng.CAXC, CMSA 1.4 TFSI 92kW CAXC, CMSA 2010-2012
A3 Convertible (8P7) Eng.CAXC 1.4 TFSI 92kW CAXC 2011-2013
A3 Sportback (8PA) Eng.CAXC, CMSA 1.4 TFSI 92kW CAXC, CMSA 2010-2013
A1 (8X1, 8XK) Eng.CBZA 1.2 TFSI 63kW CBZA 2010-2016
A3 (8P1) Eng.CBZB 1.2 TSI 77kW CBZB 2010-2012
A3 Convertible (8P7) Eng.CBZB 1.2 TFSI 77kW CBZB 2010-2013
A3 Sportback (8PA) Eng.CBZB 1.2 TSI 77kW CBZB 2010-2013

Seat - Europe Car
Alhambra CAVA, 1390cc, 1.4 TSI 2010-2016
Alhambra CNWB, 1390cc, 1.4 TSI 2010-2016
Alhambra CTHA, 1390cc, 1.4 TSI 2010-2016
ALHAMBRA (710, 711) Eng.CAVA, CNWB, CTHA 1.4 TSI 110kW CAVA, CNWB, CTHA 2010
Toledo IV CAXA, 1390cc, 1.4 TSI 2012-2016
TOLEDO IV (KG3) Eng.CAXA 1.4 TSI 90kW CAXA 2012-2015
Ibiza IV 1.2L 1199cc 2010-2019

Skoda - Europe Car
Rapid CAXA, 1390cc, 1.4 TSI 2012-2016
RAPID (NH3) Eng.CAXA 1.4 TSI 90kW CAXA 2012
RAPID Spaceback (NH1) Eng.CAXA 1.4 TSI 90kW CAXA 2012
Yeti CAXA, 1390cc, 1.4 TSI 2010-2016
Fabia II 1.2L 1199cc 2010-2014
Roomster 1.2L 1199cc 2010-2015

Volkswagen - Europe Car
CC (358) Eng.CKMA 1.4 TSI MultiFuel 118kW CKMA 2011
CC (358) Eng.CTHD 1.4 TSI 118kW CTHD 2011
Eos CAXA, 1390cc, 1.4 TSI 2011-2016
Golf VI CAVD, 1390cc, 1.4 TSI 2008-2016
Golf VI CAXA, 1390cc, 1.4 TSI 2008-2016
GOLF VI Convertible (517) Eng.CAVD, CNWA, CTHD, CTKA 1.4 TSI 118kW CAVD, CNWA, CTHD, CTKA 2011
GOLF VI Convertible (517) Eng.CAXA 1.4 TSI 90kW CAXA 2011
Golf VI Plus CAVD, 1390cc, 1.4 TSI 2009-2016
Golf VI Plus CAXA, 1390cc, 1.4 TSI 2009-2016
Passat CAXA, 1390cc, 1.4 TSI 2009-2016
Passat CKMA, 1390cc, 1.4 TSI 2010-2016
Passat CTHD, 1390cc, 1.4 TSI 2010-2016
PASSAT (362) Eng.CTHD 1.4 TSI 118kW CTHD 2012-2014
Passat CC CKMA, 1390cc, 1.4 TSI 2011-2016
PASSAT CC (357) Eng.CKMA 1.4 TSI MultiFuel 118kW CKMA 2011-2012
PASSAT Variant (365) Eng.CTHD 1.4 TSI 118kW CTHD 2012-2014
Scirocco CAXA, 1390cc, 1.4 TSI 2008-2016
Scirocco CMSB, 1390cc, 1.4 TSI 2008-2016
Scirocco CSMB, 1390cc, 1.4 TSI 2008-2016
Sharan CAVA, 1390cc, 1.4 TSI 2010-2016
Sharan CTHA, 1390cc, 1.4 TSI 2010-2016
Tiguan CAVA, 1390cc, 1.4 TSI 2009-2016
Tiguan CAVD, 1390cc, 1.4 TSI 2009-2016
Tiguan CAXA, 1390cc, 1.4 TSI 2009-2016
Tiguan CTHA, 1390cc, 1.4 TSI 2009-2016
Tiguan CTHD, 1390cc, 1.4 TSI 2009-2016
TIGUAN (5N_) Eng.CAVD, CTHD 1.4 TSI 118kW CAVD, CTHD 2011
TIGUAN (5N_) Eng.CAVD, CTHD 1.4 TSI 4motion 118kW CAVD, CTHD 2011
Touran CAVB, 1390cc, 1.4 TSI 2010-2016
Touran CAVC, 1390cc, 1.4 TSI 2010-2016
Touran CDGA, 1390cc, 1.4 TSI 2010-2016
Touran CTHB, 1390cc, 1.4 TSI 2010-2016
Touran CTHC, 1390cc, 1.4 TSI 2010-2016
TOURAN (1T3) Eng.CAVB, CTHB 1.4 TSI 125kW CAVB, CTHB 2010-2015
TOURAN (1T3) Eng.CAVC, CTHC 1.4 TSI 103kW CAVC, CTHC 2010-2015
Polo 1.2L 1199cc 2009-2019

Features & Benefits

  • Genuine OEM replacement part

  • Manufactured to original factory specifications

  • Regulates alternator output voltage

  • Helps maintain proper battery charging

  • Supports stable charging system performance

  • Original fit, function, and electrical characteristics

  • Ideal for alternator rebuilding and repair

  • Engineered for long-term reliability

 

 

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 genuine OEM and premium aftermarket alternator and starter rebuilding components for professional rebuilders, repair shops, automotive technicians, and DIY enthusiasts. Our extensive catalog includes thousands of 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 OEM part number, 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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Frequently Asked Questions

How do I confirm compatibility? +
Compare part numbers, dimensions and photos with the original component.
Is this OEM or aftermarket? +
This listing is for an aftermarket replacement part.
What should I verify before ordering? +
Check all fitment and application details before purchase.
Is professional installation recommended? +
Professional installation is recommended.
Where can I find related parts? +
Browse related starter and alternator categories on RCAutoElectric.

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