A4239 12V 100A Alternator Fits Vauxhall Insignia, Opel Insignia

Description

A4239 Replacement Alternator

For a A4239 alternator enquiry, use Lucas reference LRA04239 alongside the vehicle and original unit details. The listed electrical rating is 12V 100A. An alternator maintains battery charge and supplies electrical power while the engine runs. Applications include selected Vauxhall Insignia 2.0 Petrol variants.

Key Features and Benefits

• 12V electrical system: match the vehicle voltage before selecting a unit.
• 100A output: compare the listed rating with the original alternator.
• Lucas LRA04239 reference: a starting point for identifying the replacement.
• SKU A4239: use this code when requesting parts support.

Compatible Vehicles and Applications

• Vauxhall Insignia 2.0 Petrol – selected applications 2008–2011 (engine code A20NHT).
• Vauxhall Insignia Sports Tourer 2.0 Petrol – selected applications 2008–2011 (engine code A20NHT).
• Opel Insignia 2.0 Bio (ethanol) petrol or Methanol – selected applications 2008–2017 (engine code A20NFT).
• Opel Insignia Country Tourer 2.0 Petrol – selected applications 2013–2017 (engine code A20NHT/B20NHT).
• Opel Insignia Sports Tourer 2.0 Bio (ethanol) petrol or Methanol – selected applications 2010–2017 (engine code A20NFT).

These are selected applications, not the complete fitment list. Check the detailed vehicle compatibility table, engine code and production year, then compare the original unit before ordering.

OE Numbers and Cross-Reference Information

The following cross-reference numbers are associated with A4239. Compare them with the original unit and technical specifications; a number match alone does not establish vehicle compatibility.

LRA04239

The full manufacturer cross-reference and OE listings are available elsewhere on this page. Confirm whether a number is an OE or aftermarket reference when comparing the original unit.

When Should You Replace Your Alternator?

Charging warning lights, repeated loss of battery charge, dim or fluctuating lights and inconsistent electrical operation can indicate a charging-system problem. Battery condition, wiring and the drive belt can produce similar symptoms; arrange a diagnostic check before replacing the alternator.

Why Buy from Sahibs Auto Electrics?

Sahibs Auto Electrics is a UK automotive electrical parts specialist supplying alternators and starter motors. Ask for help identifying A4239 using the existing part number and vehicle details. Check the current condition options and availability before purchase. Buy online for UK delivery or Click & Collect, checking the current order arrangements.

Frequently Asked Questions

Will A4239 fit my Vauxhall Insignia?

Vauxhall Insignia 2.0 Petrol (2008–2011) is a listed application. Confirm the engine code and original unit configuration in the detailed fitment table.

Does A4239 replace Lucas LRA04239?

Lucas LRA04239 is a listed identification reference. Compare it with the original unit and specifications; a cross-reference does not guarantee compatibility by itself.

What specifications are listed for A4239?

The listed details include 12V, 100A output. Compare the complete specifications on this page with the unit being replaced.

Is A4239 new or remanufactured?

Check the current product condition selection for A4239. Confirm the supplier and availability of the option you want before completing the order.

What should I compare before ordering A4239?

Compare 12V compatibility, 100A output, pulley configuration, mounting points and electrical connections with the original alternator.

Does a battery warning light prove the alternator has failed?

No. Battery, belt, wiring and control faults can also affect charging. Use a charging-system test to establish the cause before ordering a replacement.