BDFHYK 12V 120A alternator for listed BMW 325i 330i 525i and X5 applications

BMW 325i 330i X5 alternator replacement 120A by BDFHYK

BMW alternator replacing 13774 13882 and 13970

BDFHYK BMW 2.5L 3.0L L6 charging alternator replacement

120A alternator replacement for listed BMW 325i 330i 525i and X5

BMW 6-groove S6 replacement alternator 120A by BDFHYK

BDFHYK OE-style alternator for listed BMW L6 applications

Alternator for BMW 325i 330i X5 2001-2006 2.5L 3.0L L6 120A Replace 13774 13882 13970 | BDFHYK

$131.99

Product Detail

Type Alternator
SKU BDDLZ-BD-05-ENS16-00151AS-000-W
OE Number 12317501597,12-31-7-501-597,12317501599,12-31-7-501-599,12317501690,12-31-7-501-690,12317501755,12-31-7-501-755,12317510593,12-31-7-510-593,12317510597,12-31-7-510-597,12317510599,12-31-7-510-599,12317515317,13734,13774,13882,13970,2542377,2542377B,439398,40024096,400-24096

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BMW 325i 330i X5 Alternator Replacement

Designed for BMW 325i, 330i, 525i and X5 models with 2.5L and 3.0L L6 engines, this alternator replacement restores reliable charging performance and stable electrical output. Built to match OE specifications, it provides a direct-fit replacement solution for worn or failed factory alternators.

Product Specification

Specification	Details
Voltage	12V
Amperage	120A
Rotation	CW (Clockwise)
Pulley Groove	6-Groove
Pulley Class	S6
Regulator/Fan Type	IR/IF

Vehicle Fitment & OE Reference

Year	Make	Model	Engine
2001-2006	BMW	325i / 325Ci / 325xi	2.5L L6
2001-2006	BMW	330i / 330Ci / 330xi	3.0L L6
2001-2005	BMW	525i	2.5L L6
2001-2006	BMW	X5	3.0L L6

OE Replacement Numbers:
13774, 13882, 13970, 2542377, 2542377B, 439398, 40024096, 400-24096

Signs Your Alternator Needs Replacement

For BMW 3 Series and X5 models, a failing alternator may cause unstable electrical performance and charging issues. Common signs include:

Battery warning light stays illuminated
Dim headlights or weak electrical accessories
Slow engine cranking or frequent battery drain
Electrical components working intermittently
Whining or unusual noise from the alternator area

Why Choose BDFHYK Alternator

OE Fitment Design: Engineered according to original specifications for proper mounting and electrical connection.
Stable Charging Performance: Provides consistent voltage output to support vehicle electrical systems.
Durable Internal Components: Built for reliable performance under daily driving conditions.
Direct Replacement Installation: Designed for a plug-and-play replacement experience.

Installation

Disconnect the negative battery terminal before installation.
Remove the existing alternator and disconnect wiring connections.
Install the replacement alternator in the original mounting location.
Reconnect electrical connectors and drive belt.
Verify charging voltage after installation.

Technical Specifications

Brand	BDFHYK
Product Type	Alternator
Product Positioning	OE-style replacement alternator
System Voltage	12V
Rated Amperage	120A
Rotation	CW (Clockwise)
Regulator / Fan Type	IR/IF
Pulley Groove	6-Groove
Pulley Class	S6
Primary Reference	13774 / 13882 / 13970
Listed Vehicle Fitment	listed 2001-2006 BMW 325i/325Ci/325xi, 330i/330Ci/330xi and X5; 2001-2005 BMW 525i
Engine	2.5L or 3.0L L6 as listed
Fitment Checks	Confirm year, model, engine, amperage, electrical connector, pulley configuration, mounting points and OE/interchange reference before ordering.
Important Note	Fitment can vary by BMW model and engine configuration. Match the original alternator specifications and listed references before installation.

Q: What BMW applications is this alternator listed to fit? A: It is listed for 2001-2006 BMW 325i/325Ci/325xi, 330i/330Ci/330xi and X5 applications, plus 2001-2005 BMW 525i, using the listed 2.5L or 3.0L L6 engines.

Q: What engine applications are listed? A: Listed applications use 2.5L or 3.0L L6 engines depending on model.

Q: What are the listed voltage and amperage ratings? A: The listed electrical rating is 12V and 120A.

Q: Which OE or interchange references are listed? A: Listed references include 13774, 13882, 13970, 2542377, 2542377B, 439398, 40024096 and 400-24096.

Q: What pulley configuration is listed? A: The product information lists a 6-groove pulley with pulley class S6.

Q: Can a weak alternator cause the battery warning light to appear? A: Yes. A charging-system fault can trigger a warning light, but the battery, wiring, belt drive and grounds should also be diagnosed.

Q: What should be checked before ordering? A: Confirm year, model, engine, amperage, connector, pulley, mounting points and OE/interchange number.

Q: Should the battery be disconnected before installation? A: Yes. Disconnect the negative battery terminal and follow the vehicle service procedure.

Q: Should the drive belt and tensioner be inspected during replacement? A: Yes. Inspect the belt, tensioner and pulley condition because wear or incorrect tension can affect alternator operation.

Q: What should be checked after installation? A: Verify belt routing, secure electrical connections and charging-system operation to the vehicle manufacturer's specification.

Q: Will replacing the alternator always solve a battery-drain or no-charge problem? A: No. A weak battery, damaged cables, poor grounds, belt-drive problems or parasitic draw can produce similar symptoms.

Q: Is this a genuine OEM alternator? A: No. This is a BDFHYK aftermarket replacement product. OE and interchange numbers are provided for fitment reference.

Returns & Refunds

We accept returns within 30 days of delivery for eligible items. If the product is unused and in original condition, you may request a return according to our refund policy. Full policy details: View Refund Policy . We recommend contacting our support team before initiating a return to ensure the fastest resolution.

Customer Support

If you purchased the wrong part, received an incompatible item, or need installation assistance, please contact us directly.

Email: service@bdfhyk.com

Business Hours:

Mon–Fri 9:00–18:00 (GMT+8)

Mon–Fri 19:00–04:00 (UTC−6 / CST)

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