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Standard Ignition AS639 Turbocharger Boost Sensor
| Brand | Standard Ignition AS639 |
|---|---|
| Color/Finish | Black |
| Connector Gender | Female |
| Connector Quantity | 1 |
| Connector Shape | Round, rectangular |
| Connector Type | Plug in |
| Hardware Included | No |
| Mounting Bracket(s) Included | No |
| Notes | Sensor only |
| O-Rings Included | No |
| Terminal Gender | Male |
| Terminal Quantity | 4 |
| Terminal Type | Blade |
| Vacuum Port Quantity | 3 |
| Wiring Harness Included | No |
| Fits | BMW · 5 vehicles |
Turbocharger boost sensor. Monitors boost pressure for precise engine management.
Plug-in connector. Single female connector with 4 blade terminals.
Sensor only. No hardware, O-rings, or wiring harness included.
Cross-references Hella 009403421, Standard Ignition AS639 and 2-27258 for the same application. See all 8.
Turbocharger Boost Sensor for BMW Diesel Applications
Standard Ignition AS639 is a sensor-only turbocharger boost sensor built for direct replacement in select BMW diesel applications. It uses a black housing with a plug-in female connector and a 4-blade male terminal layout for a straightforward electrical connection.
Compatible With 2009-2011 BMW 335d and 2009-2010 BMW X5, this turbocharger boost sensor supports accurate boost pressure monitoring in the intake and turbo system. Standard Ignition AS639 is a direct-fit service part for BMW 335d and BMW X5 diesel models listed in the fitment data.
Key Features
- Turbocharger boost sensor, sensor only
- Black finish
- Female plug-in connector with round and rectangular connector shape
- 4 male blade terminals
- 3 vacuum ports
- No wiring harness, O-rings, mounting brackets, or hardware included
- Cross-reference part numbers include Hella 009403421 and Standard Ignition AS639
Detailed Description
Standard Ignition AS639 is engineered as a replacement turbocharger boost sensor for diesel BMW applications that require precise boost signal input to the engine management system. The unit features a single female connector, blade-style terminals, and three vacuum ports, matching the physical interface used in the listed vehicles. For shoppers searching for a BMW 335d boost sensor or BMW X5 turbo boost sensor, AS639 provides a direct replacement option for the specified model years.
This part cross-references Hella 009403421 for the same application. It also cross-references 2-27258 and 5S13287 for related fitment coverage.
What It Helps Address
- Boost pressure signal faults
- Turbocharger control issues related to inaccurate sensor input
- Check engine lights tied to boost monitoring circuits
- Driveability concerns caused by incorrect manifold or boost readings
- Replacement of a damaged or failing turbocharger boost sensor
Installation Notes and Tips
Install AS639 only on the BMW applications listed in the fitment data: 2009-2011 BMW 335d and 2009-2010 BMW X5. Verify connector style, terminal layout, and vacuum port configuration before installation. Because this is a sensor-only part, reuse of existing mounting provisions and related service components should be confirmed during diagnosis and removal.
Quality Assurance
Standard Ignition is a recognized aftermarket brand for electrical and engine management components. AS639 is built to match the listed application requirements for BMW diesel turbo boost sensing service.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2011 | BMW | 335d | — | — | — | N/A | — |
| 2010 | BMW | 335d | — | — | — | N/A | — |
| 2010 | BMW | X5 | 3.0L | L6 | DIESEL | N/A | — |
| 2009 | BMW | 335d | — | — | — | N/A | — |
| 2009 | BMW | X5 | 3.0L | L6 | DIESEL | N/A | — |
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