BERU Alternator Voltage Regulator - GER004

Voltage [V]: 14,5; Manufacturer Restriction: BOSCH; Support plate diameter [mm]: 28; usable for ve...

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AutodocBERU Alternator Regulator MERCEDES-BENZ,OPEL,BMW GER004 11610050600811,12311726022,1726022 Alternator Voltage Regulator,Regulator, alternator,GER004
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Product Information

Full details

This BERU Alternator Voltage Regulator (GER004) is designed for vehicle owners and mechanics needing a reliable replacement part for a wide range of Mercedes-Benz, Opel, BMW, and Ford models manufactured from the mid-1970s to the early 1990s. Its key benefit is ensuring consistent charging voltage, which protects your vehicle's electrical system and battery. A potential caveat is the extensive compatibility list, requiring careful verification for your specific vehicle's make, model, and engine code before purchase.

All features

Model Part NumberGER004
BrandBERU

Extended Product Information

FAQs

What vehicles is the BERU GER004 compatible with?

This voltage regulator is compatible with a wide range of Mercedes-Benz (e.g., 190 W201, W124 series), Opel (e.g., Kadett E, Corsa A, Vectra A), BMW (e.g., 3 Series E30/E36, 5 Series E28/E34), and Ford (e.g., Sierra, Escort IV, Fiesta II) models, primarily those manufactured between the mid-1970s and early 1990s. Always verify your specific vehicle's details against the detailed compatibility list.

What does a voltage regulator do?

The voltage regulator controls the output voltage of the alternator, ensuring it stays within a safe range (typically around 14.5V) to properly charge the battery and power the vehicle's electrical systems without causing damage from overvoltage.

Does this regulator work with any alternator?

The GER004 is specifically designed for compatibility with BOSCH alternators. It's important to confirm your vehicle is equipped with a BOSCH alternator for proper function.

What is the support plate diameter?

The support plate diameter for this regulator is 28mm.

How do I know if I need to replace my voltage regulator?

Signs include a battery warning light staying on, a battery that is constantly undercharged or overcharged, dimming headlights, or other electrical system malfunctions. A mechanic can diagnose if the voltage regulator is the issue.

Is professional installation required?

While not strictly required for those with automotive electrical experience, professional installation is recommended to ensure correct and safe fitting, especially if you are unfamiliar with alternator systems.

What is the operating voltage?

The BERU GER004 Alternator Voltage Regulator operates at 14.5 Volts.

Troubleshooting

Battery not charging or undercharging

Check all electrical connections to the regulator and alternator for tightness and corrosion. Verify the alternator is producing output. If connections are good and the alternator is functional, the voltage regulator may be faulty and require replacement.

Battery overcharging (excessive voltage)

If the charging voltage consistently exceeds 15V, the voltage regulator is likely malfunctioning and needs to be replaced. Ensure the regulator is correctly installed and connected.

Indicator light (battery warning light) stays on

This can indicate a charging system fault. First, check belt tension and condition. Then, verify connections. If all else fails, the voltage regulator or the alternator itself may be the cause.

Intermittent charging issues

Loose or corroded connections are the most common cause. Inspect and clean all relevant wiring and terminals. A failing regulator can also cause intermittent problems.

Pros and Cons

Pros

  • Ensures stable and correct charging voltage for vehicle electrical systems.
  • Compatible with a wide range of vehicle makes and models from key manufacturers.
  • Supports various alternator charging current capacities.
  • Designed for vehicles manufactured across a significant period (mid-70s to early-90s).
  • From a trusted automotive parts brand, BERU.

Cons

  • Requires careful verification of vehicle compatibility due to the extensive application list.
  • May not be suitable for vehicles outside the specified construction year ranges.
  • Specific compatibility with BOSCH alternators is noted, potentially limiting use with other brands.
  • Installation may require professional expertise.

Setup, Compatibility & Care

Compatibility Check:

Before purchasing, it is crucial to verify that the BERU GER004 is compatible with your specific vehicle. Check your vehicle's make, model, engine code (e.g., M 50 B), and manufacturing year against the detailed list provided. Also, confirm if your vehicle uses a BOSCH alternator, as this is a manufacturer restriction.

Installation:

  1. Safety First: Disconnect the vehicle's battery before beginning any work on the alternator or charging system.
  2. Access Alternator: Locate and access the alternator. This may involve removing other components.
  3. Remove Old Regulator: Carefully remove the old voltage regulator, noting its connection points.
  4. Install New Regulator: Attach the BERU GER004, ensuring the 28mm support plate is correctly seated and connections are made as per the vehicle's service manual or the regulator's instructions.
  5. Reconnect Battery: Reconnect the battery.
  6. Test System: Start the engine and use a multimeter to check the charging voltage at the battery terminals. It should be within the expected range (typically around 14-14.5V).

*Note: Professional installation is recommended if you are not experienced with automotive electrical systems.*

Care:

This is a solid-state electronic component and generally requires no routine maintenance. However, keeping the alternator area clean and free from excessive dirt and debris can help prevent overheating and premature failure. Ensure electrical connections remain clean and secure.

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