A4621 12V 170A Alternator Fits Bmw 335i, Bmw 435i, Bmw 435i Coupe

Description

A4621 Replacement Alternator

Choose a replacement by comparing the A4621 alternator and its Lucas reference, LRA04621, with your existing unit. The listed electrical rating is 12V 170A. An alternator maintains battery charge and supplies electrical power while the engine runs. Applications include selected BMW 335i 3.0 Petrol variants.

Key Features and Benefits

• 12V electrical system: match the vehicle voltage before selecting a unit.
• 170A output: compare the listed rating with the original alternator.
• 8-groove pulley: check belt profile and alignment against the existing unit.
• 4 mounting holes: compare the fixing pattern and unit position.
• M8 B+ terminal: check the connection against the original unit.

Compatible Vehicles and Applications

• BMW 335i 3.0 Petrol – selected applications 2011–2015 (engine code N55B30A).
• BMW 435i 3.0 Petrol – selected applications 2013–2016 (engine code N55B30A).
• BMW 435i Coupe 3.0 Petrol – selected applications 2013–2016 (engine code N55B30A).
• BMW M135i 3.0 Petrol – selected applications 2011–2016 (engine code N55B30A).
• BMW M2 Coupe 3.0 Petrol – selected applications 2015–2018 (engine code N55B30A).
• BMW M235i 3.0 Petrol – selected applications 2014–2016 (engine code N55B30A).

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 A4621. Compare them with the original unit and technical specifications; a number match alone does not establish vehicle compatibility.

LRA04621

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 A4621 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 A4621 fit my BMW 335i?

BMW 335i 3.0 Petrol (2011–2015) is a listed application. Confirm the engine code and original unit configuration in the detailed fitment table.

Does A4621 replace Lucas LRA04621?

Lucas LRA04621 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 A4621?

The listed details include 12V, 170A output, 8 pulley grooves. Compare the complete specifications on this page with the unit being replaced.

Is A4621 new or remanufactured?

Check the current product condition selection for A4621. Confirm the supplier and availability of the option you want before completing the order.

What should I compare before ordering A4621?

Compare 12V compatibility, 170A 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.