Aftermarket Bosch Voltage Regulator IB236

Specifications

• MFR: BOSCH
• FEATURE 1: 100% New
• FEATURE 2: External sense
• FEATURE 3: Ignition activated but will lamp activate and stator start
• FEATURE 4: Shorted field, lamp & choke protection
• NOTE 1: Active lamp function - with output.
• SPECS FOR: Bosch IR/IF Alternators
• SPECS: 12 Volt, A-Circuit, IG-S-L-DFM Terminals, 14.4 Vset, 5 sec. LRC

Used On

• Toyota (2005-2009)

Replaces

Bosch: F 00M 145 236, F 00M 145 305, F 00M 145 324, F 00M 145 334, F 00M 145 376, F 00M 145 392, F 00M 145 865, F 00M 145 873, F 00M 145 874
Toyota: 27700-0L020, 27702-0D020

Lester Numbers

11129, 20018, 20327, 20356, 21027, 22375, 22514, 22517, 22518, 23189

Unit Numbers

Bosch: 0 120 000 023, 0 120 888 888, 0 124 0AC 30B, 0 124 0AC 5HB, 0 124 0AD 39A, 0 124 0AD 39B, 0 124 225 051, 0 124 225 052, 0 124 225 053, 0 124 225 054, 0 124 315 015, 0 124 315 016, 0 124 315 024, 0 124 315 025, 0 124 315 029, 0 124 315 033, 0 124 315 034, 0 124 315 040, 0 124 315 045, 0 124 325 071, 0 124 325 079, 0 124 325 080, 0 124 325 082, 0 124 325 084, 0 124 325 085, 0 124 325 086, 0 124 325 123, 0 124 325 165, 0 124 325 167, F 004 225 000, F 004 225 100
Lucas: LRA03632
Original Reference Number: 301889RI, 59212103, 89212103, 89215470, ABO401A, ABO401C, ADT311179C, L 80 920
Toyota: 27060 0Q030, 27060-007NL, 27060-0D020, 27060-0D020, 27060-0D030-A, 27060-0D030-B, 27060-0D140, 27060-0D140A, 27060-0H070, 27060-0H080, 27060-0H221, 27060-0J051, 27060-0J061, 27060-0L030, 27060-0L040, 27060-0L040, 27060-0L050, 27060-0L060-B, 27060-0P010, 27060-0P020-84, 27060-0P110, 27060-0Q040, 27060-OD140, 270600-D030, 270600D14084

Vehicle Application

Toyota - Europe Car
Avensis T22 1600 2000–2003
Avensis T22 1800 2000–2003
Avensis T25 1800, 1ZZ-FE 2003–2010
Camry (V3) 2.4 (ACV30, ACV36) 112kW 2001–2006
Camry (V3) 2.4i (ACV30, ACV36) 112kW 2001–2006
Camry (V4) 2.4 (ACV40) 116kW 2006–2011
Corolla (E11) 1600, ZZE112, 3ZZ-FE 1999–2002
Corolla (E11) 1400, ZZE111, 4ZZ-FE 2000–2002
Corolla (E12) 1400, ZZE120, 4ZZ-FE 2001–2010
Corolla (E12) 1600, ZZE121, 3ZZ-FE 2002–2010
Corolla Verso 1600, 3ZZ-FE 2001–2004
Hi-Ace 2004–2012
Land Cruiser 2004–2012
Yaris II 1298cc 2SZ-FE, 1.3 VVT-i 2006–2008
Yaris 1000, 1KR-FE 2005–2010

Toyota Truck
Tacoma V6 4.0L 3956cc 241cid 2005–2009

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:

• Bearings
• Brushes
• Brush Holder
• Slip Rings
• Rectifier
• Diodes
• Rotor
• Clutch Pulley
• Insulators

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.