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Bosch 15895 Oxygen Sensor

Bosch 15895 Oxygen Sensor

4.4· 108 ratings

Best price now

$41.02at Partsgeek.comObserved at 3:51 PM

Compared across 4 stores. Prices are checked against each store and labelled with when.

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Our take on the Bosch 15895 Oxygen Sensor

The Bosch 15895 is a heated narrowband oxygen sensor with an OE-style connector, made for a range of GM vehicles including 2004 Buick Park Avenue and Aurora and 2004 Sierra 1500 with the 4.8L V8. It is a direct-fit upstream or downstream replacement, threaded at 18 mm, and Bosch states it meets or exceeds OE accuracy specs. At $21.25 on eBay as of November 3, 2026, it sits at the low end of what this sensor typically sells for; the other three stores price it higher.

Best forOwners of 2004 GM trucks and Buicks chasing a check-engine light for a slow or dDIYers who want a plug-and-play connector instead of splicing wiresBudget repairs on high-mileage 4.8L or 3.8L engines
Pros
  • OE-style connector means no cutting or splicing
  • Heated element reaches operating temperature quickly for accurate fuel trim
  • Bosch is a common OE supplier, so fit and thread pitch match factory parts
  • 18 mm threaded body installs with a standard O2 sensor socket
  • Low price at $21.25 on eBay as of November 3, 2026
Cons
  • Narrowband only; not a wideband sensor for tuning use
  • Single sensor; V8 trucks usually need more than one
  • Fitment is vehicle-specific, so the listed Buick and Sierra applications must be confirmed by year and engine
  • No wireless or diagnostic output; it only sends the standard voltage signal

Bosch 15895 Oxygen Sensor prices at every store

  • Partsgeek.comNew

    In stock

    $41.02Observed at 3:51 PM
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  • Partzilla.comNew

    In stock

    $43.06Observed at 3:51 PM
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  • Parts PassNew

    In stock

    $44.53Observed at 3:51 PM
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  • eBayNew

    In stockSold by eeuroparts

    $58.83Observed at 3:51 PM
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Also available at

  • eBayCheck price at eBay
  • AutoZoneCheck price at AutoZone
  • CARiD.comCheck price at CARiD.com
  • CarParts.comCheck price at CarParts.com
  • eEuroparts.comCheck price at eEuroparts.com
  • FleetPrideCheck price at FleetPride
  • NAPA Auto PartsCheck price at NAPA Auto Parts
  • O'Reilly Auto PartsCheck price at O'Reilly Auto Parts
  • Advance Auto PartsCheck price at Advance Auto Parts
  • SparkPlugs.com FamilyCheck price at SparkPlugs.com Family
  • Summit RacingCheck price at Summit Racing

Bosch 15895 Oxygen Sensor price history

Lowest price we've seen: $38.87 on Nov 3 at eBay. Tracked across 14 stores since Nov 3.

What reviewers say

With 4.4 out of 5 from 108 ratings, owners mostly report the sensor fixes lean-code and heater-circuit check-engine lights and plugs straight into the factory harness. Complaints center on occasional early failures and on sensors that arrive without the right connector for a given trim.

Pros
  • Direct plug-in with the factory connector
  • Clears P0135 and similar O2 codes
  • Correct thread size and fit on GM applications
  • Good value versus dealer parts
Cons
  • A few units fail within months
  • Connector mismatch reported on some vehicles
  • No instructions included

Specifications

Functionality Type
Sensor
Measuring Media
Oxygen
Sensor Type
Oxygen sensor
Make
Buick
Model
SIERRA 1500 PICKUP, AURORA, PARK AVENUE
Vehicle Type
Truck
Year
2004
Engine Type
V8-294 4.8L, V6-3800 3.8L, V8-244 4.0L DOHC
Instrument Type
Sensor
Part Type
Oxygen Sensor
Application
Engine management
Measurement Accuracy
Meets or exceeds OE specifications
Measurement Sensor Type
Heated
Number Of Sensors
1
Thread Size
18 mm (diameter)
Mounting Type
Threaded
Included Hardware
OE Connector
Output Signal
Electrical signal
Ports And Interfaces
OE Connector
Wired Connectivity
Yes
Wireless Connectivity
No
Dimensions
5.8 IN (height)
Color
Narrowband

Questions and answers

Is the Bosch 15895 worth it?
For a stock 2004 GM truck or Buick with an O2-related code, yes. It is a direct-fit heated sensor at $21.25 on eBay as of November 3, 2026, well below typical dealer pricing.
Will it fit my 2004 Sierra 1500?
It is listed for the 2004 Sierra 1500 with the 4.8L V8, but GM used different sensor positions and connector lengths by engine and emissions package. Confirm the position (upstream or downstream) and your engine code before ordering.
How is it different from a wideband sensor?
The 15895 is a narrowband sensor that switches around stoichiometric air-fuel ratio, which is what the factory ECU expects. A wideband gives a linear reading and is used for aftermarket tuning, not as a stock replacement.
How hard is the install?
It is rated easy: unplug the connector, unscrew the 18 mm sensor with an O2 socket, and thread in the new one. Rusted bungs on older trucks are the main obstacle, so penetrating oil helps.
What is in the box?
One heated oxygen sensor with the OE connector attached. No socket or anti-seize beyond what is pre-applied on the threads.
When is it cheapest?
The best new price was $21.25 at eBay as of November 3, 2026, with the other three stores higher. O2 sensor prices move little, so waiting rarely saves much.
Where is the Bosch 15895 Oxygen Sensor cheapest?
At Partsgeek.com, for $41.02, as of our latest check.
What do buyers say about the Bosch 15895 Oxygen Sensor?
Rated 4.4 out of 5 from 108 ratings.
Where can I buy the Bosch 15895 Oxygen Sensor?
14 stores we checked sell it, including eBay, Partsgeek.com, Parts Pass, Partzilla.com, AutoZone.