How do you guarantee product quality?

We conduct pre-production samples, final inspections before shipment, and 100% visual and function checks on finished products.

What materials are used for the crankshaft?

We produce crankshafts from ductile iron and alloy materials that meet US standards and can replace forged steels.

Where is the factory located?

Our factory is located in Guiyang, Guizhou, China, with a plant area of over 13,000 square meters.

Stem N52b30 Crankshaft Gasoline Engine OE 11210392993 for BMW E90 E91 Z4 N52 3.0

Name: Stem N52b30 Crankshaft Gasoline Engine OE 11210392993 for BMW E90 E91 Z4 N52 3.0
Brand: Guiyang Baiyun Alloy Casting Factory
SKU: 1929680471

Guizhou, ChinaGuiyang Baiyun Alloy Casting Factory

US$399.00

1-9 Pieces

US$355.00

10+ Pieces

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

Yes

Application

Car

Model NO.

N52B30

Certification

ISO 9001

Warranty

24 Months

Engine Type

Gasoline

Material

Cast Iron

G/W

24.6

Transport Package

Wooden

Specification

66.5x17x18cm

Trademark

STEM

Origin

China

HS Code

8483109000

Production Capacity

50000 Pieces/ Year

Key features

20+ Years Manufacturing Experience: Professional production of engine crankshafts for over 20 years with ISO-9001 certification.

One-Stop Production: Complete in-house processes including melting, casting, heat treatment, machining, and inspection.

High-Quality Materials: Produces ductile iron and alloy crankshafts meeting US standards, replacing forged steels.

100% Quality Inspection: Strict pre-production samples, final inspections, and 100% finished product visual and function checks.

Global Market Recognition: Exported for over 7 years with excellent quality recognized in North America, Europe, and Southeast Asia.

Flexible Customization: Offers full, minor, and flexible customization from samples or designs with OEM/ODM services.

24 Months Warranty: Comprehensive 24-month warranty coverage for all crankshaft products.

After-Sales Service: Dedicated after-sales support available for engineering and automotive engine crankshafts.

Company profile

High Repeat Buyers ChoiceYears of Export ExperienceFull CustomizationManagement Certification

Guiyang Baiyun Alloy Casting Factory

Guizhou, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 25 years CertifiedNearest Port: Shenzhen PortAverage Response Time: ≤6.64h

AI-Powered supplier vetting

SummaryGuiyang Baiyun Alloy Casting Factory is a China-based, state-owned crankshaft manufacturer established in 1997, with reported operations dating to 1992 and more than three decades of crankshaft-material experience. It operates a 13,218 m² plant, has 84 employees, and reports annual productivity of 80,000 pieces across American, German, Japanese, and Korean series. The supplier holds an ISO 9001:2015 management-system certificate and reports 11–20 quality-control staff. It claims OE-manufacturer quality standards and a one-year/100,000-kilometer crankshaft guarantee, but the broader after-sales-service capabilities are not verified. R&D, customization, traceability, overseas infrastructure, and several operational controls remain insufficiently documented. A BV audit is recorded with an evaluation result of 0 and a stated validity period from April 28, 2024 to April 27, 2025; the meaning of the result is not defined in the provided data.

Supplier typeThe supplier is identified as Guiyang Baiyun Alloy Casting Factory, a state-owned Chinese company focused on crankshaft production for automotive aftermarket applications and auto/motorcycle parts. Its reported operating history spans more than three decades, indicating a specialized manufacturing profile rather than a general trading business.

CertificationsThe supplier reports an ISO 9001:2015 certificate. A BV audit is also recorded, but the audit result is listed as 0 without an interpretation, so the audit record cannot independently establish a positive compliance outcome.

After-Sales capabilityThe supplier states that its crankshafts are covered by a one-year and 100,000-kilometer guarantee for regular use and describes service to a global market. However, specific repair, replacement, response-time, or overseas support capabilities are not provided.

R&D capabilityThe supplier reports more than three decades of crankshaft-material research, production, and development, plus three years of total R&D engineer experience and a focus on high-end and modified-engine crankshafts. Specific new-product launches, R&D documentation, SDKs, 3D design, or other structured innovation outputs remain unknown.

Production capacityThe supplier reports a 13,218 m² manufacturing plant, 84 employees, and annual productivity totaling 80,000 pieces across four regional product series. These stated facilities and capacity figures provide explicit evidence of established production capability.