Left Oxygen Sensor for 2007-2008 BMW Alpina B7 & More - Bosch 15321

$132.99

Part number: 15321

UPC: 028851153218

Condition: New

Weight: 0.30 LBS

Item Package Quantity: 1

$132.99

Current Stock: 4

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Bosch Oxygen Sensor P/N:15321

$132.99

Description

Bosch 15321 left oxygen sensor for the 2007-2008 BMW Alpina B7 V8 4.4L and other vehicles reads the oxygen content of the exhaust and signals the ECU. The ECU uses that signal to adjust the air-fuel ratio, which helps keep combustion stable and emissions down.

Switching-type narrow-band design that gives the ECU precise air-fuel-ratio readings
Heated sensor that reaches operating temperature in under 10 seconds for quick closed-loop control
Metal housing built to withstand exhaust streams up to 1,880°F
Integrated heater element and TSP coating to resist vibration, corrosion and contamination

Quick facts

Part: Bosch 15321 oxygen sensor
Fits: 2007-2008 BMW Alpina B7 V8 4.4L and other vehicles
Position: Upstream, downstream, downstream left
Material: Metal housing
Condition: New

A worn oxygen sensor can show up as a check engine light, rougher running or poorer fuel economy. Before you replace the sensor, rule out exhaust leaks, damaged wiring and other faults that can light the same warning; if this sensor is the cause, this one replaces it.

Fits

It is listed for a wide range of BMW models, including the 2004-2005 BMW 545i V8 4.4L and the 2004-2005 BMW 645Ci V8 4.4L. This listing is one sensor, and the 2007-2008 BMW Alpina B7 V8 4.4L takes one. Don't see your car here? Look it up in the "Vehicles it fits" section.

Specifications

Fit and size

Position: upstream, downstream, downstream left
Quantity per vehicle: 1
Thread size: M18 - 1.5
Hex size: 22 mm
Length, sealing surface to end of connector: 16.5 in

Build and materials

Type: heated, narrow-band, switching-type
Housing material: metal
Condition: new
Bosch warranty: 1 year, unlimited mileage, for non-commercial passenger cars and light trucks
Country of origin: United States

In the box

One oxygen sensor with its wiring harness. A mounting bracket is not included.

Installation notes

Conductive anti-seize is pre-applied to the threads.
The connectors are direct-fit for quick installation.

Manufacturer's description

Product specs

Vehicles it fits

Interchange numbers

Buyer's Q&A

Frequently Asked Questions

Is this the right BMW 545i oxygen sensor for a 2004-2005 V8 4.4L?

Yes. Bosch 15321 is listed for the 2004-2005 BMW 545i V8 4.4L, and that car takes one sensor. For a different car, look it up in the "Vehicles it fits" section.

Does the Bosch 15321 oxygen sensor come with its wiring harness?

Yes. Bosch 15321 comes with its wiring harness; a mounting bracket is not included.

Is this Bosch premium oxygen sensor heated?

Yes. This oxygen sensor is a heated narrow-band type with an integrated heater element, and it reaches operating temperature in under 10 seconds.

What thread size and hex size does this oxygen sensor have?

The thread size is M18 - 1.5 and the hex size is 22 mm. Length from the sealing surface to the end of the connector is 16.5 in.

What comes pre-applied on the threads of this Bosch O2 sensor?

Conductive anti-seize comes pre-applied to the threads, and the connectors are direct-fit for quick installation.

Manufacturer resources

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