The Bosch ALT1029CX 150A Alternator delivers exceptional OEM-grade power output and electrical stability for high-performance BMW, Land & Range Rover engines. Designed for vehicles with complex electrical systems, premium comfort features, and high-demand accessories, this alternator ensures consistent, efficient charging under all driving conditions—from city commuting to highway cruising.

With a robust 150-amp capacity, a 7-groove pulley, and a 2-pin IG-L interface, this unit is engineered for seamless integration and maximum reliability in BMW V8 and inline-6 platforms. When you choose Bosch, you choose precision engineering trusted worldwide.

Vehicle Applications

Direct OEM-grade replacement for (but not limited to):

BMW

X5: 4.4L • 4.6L
5-Series: 3.5L • 3.9L • 4.4L
7-Series: 3.5L • 3.9L • 4.4L
Chassis: E38 • E39 • E53BMW

LAND/RANGE ROVER

Land Rover Range Rover III 4.4L 4X4
Land Rover Range Rover III 4.4L V8

(Always verify fitment via VIN or OEM cross-reference.)

Key Features & Benefits

✔ High-Capacity Output — 150A Peak Performance

Engineered to power modern BMW electrical systems including climate control modules, infotainment, lighting, safety electronics, and comfort features.

✔ 7-Groove Pulley System

Improves belt stability, minimizes vibration, and enhances long-term durability under V8 load demands.

✔ Advanced 2-Pin IG-L / 15-61E/L Interface

Ensures proper electrical communication, optimized field control, and reliable charging response.

✔ IR/IF Technology (Internal Regulator / Internal Fan)

Provides superior thermal management and accurate voltage control for extended alternator life.

✔ NFB2 Architecture — Premium BMW-Compatible Design

Built to match OEM electrical characteristics for flawless integration and enhanced system reliability.

✔ Bosch OEM Build Quality

Precision manufacturing, heat-resistant components, and high-quality bearings guarantee dependable performance under demanding conditions.

Technical Specifications

Specification	Detail
Part Number	ALT1029CX
Brand	Bosch
Voltage	12V
Max Output	150A
Pulley	7-Groove
Connector	2P (IG-L / 15-61E/L)
Regulator	Internal (IR)
Cooling	Internal Fan (IF)
Design Type	NFB2
Applications	BMW X5, 5-Series, 7-Series (E38/E39/E53) • E39 Land Rover Range Rover III 4.4L 4X4/V8 • Engine – 358S1, 358S1/S2, 358S2, 398D1, 448PN, 448S1, 448S1/S2, 448S2, 468S1, 54121, 54122, M62, M62B, M62B35(358S1), M62B35(358S2), M62B35, M62B44 V8, M62B44(448S1), M62B44(448S2), M62B44, M62B46(468S1), M62B46, M67D, M67D39(398D1), M67D39, M73B, M73B54(54121), M73B54(54122), M73B54

Why Choose the Bosch ALT1029CX?

Designed for demanding BMW platforms—perfect for V8 and high-output charging systems.
Delivers stable charging, even while running multiple power-hungry accessories.
Reduces battery stress and optimizes long-term electrical performance.
OEM-grade fitment ensures quick installation with zero modification.
Reliable under extreme temperatures and heavy electrical loads.

Installation & Maintenance Notes

Verify fitment using VIN or OEM part cross-reference.
On replacing the alternator, on these vehicles, both (2) batteries of the vehicle need to be replaced!!!
Inspect belts and tensioners during replacement.
Perform periodic load testing for best long-term performance.

Upgrade your BMW charging system with OEM-level performance Today.