---
product_id: 178944370
title: "Bosch 17025 Oxygen Sensor"
brand: "bosch"
price: "S$216"
currency: SGD
in_stock: true
reviews_count: 7
category: "Bosch"
url: https://www.desertcart.sg/products/178944370-bosch-17025-oxygen-sensor
store_origin: SG
region: Singapore
---

# High-temp durability 850°F True direct-fit OE connectors Precision wideband sensing Bosch 17025 Oxygen Sensor

**Brand:** bosch
**Price:** S$216
**Availability:** ✅ In Stock

## Summary

> ⚡ Tune smarter, drive stronger — never settle for guesswork!

## Quick Answers

- **What is this?** Bosch 17025 Oxygen Sensor by bosch
- **How much does it cost?** S$216 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/178944370-bosch-17025-oxygen-sensor)

## Best For

- bosch enthusiasts

## Why This Product

- Trusted bosch brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Installation:** True direct-fit OE connectors and pre-coated anti-seize threads make upgrades hassle-free.
- • **Engineered for Performance:** Ideal for aftermarket high-performance wideband kits, enhancing fuel efficiency and power.
- • **German Engineering Quality:** 100% genuine Bosch sensor manufactured in Germany, trusted by pros and enthusiasts alike.
- • **Built to Last Under Pressure:** Robust sensor design with seared protection tube ensures longevity even at 850°F exhaust temps.
- • **Precision Air/Fuel Ratio Control:** Advanced wideband sensor delivers exact oxygen measurement for optimized engine tuning.

## Overview

The Bosch 17025 Oxygen Sensor is a premium wideband air/fuel sensor designed for precise oxygen measurement in high-performance vehicles. Featuring advanced sensing technology, robust construction rated for up to 850°F, and true direct-fit OE connectors with anti-seize threads, it ensures accurate engine tuning and easy installation. Manufactured in Germany, this sensor delivers reliable longevity and is a top choice for aftermarket upgrades.

## Description

Bosch 17025 Premium Wideband A/F Oxygen (O2) Sensors are designed for use with aftermarket high performance wideband kits. Wideband/air-fuel sensors perform the same function as a regular O2 sensor, but they precisely measure the amount oxygen in the exhaust rather than just switching between rich (too much fuel, not enough oxygen) and lean (too much oxygen, not enough fuel). Our wideband sensors use a more sophisticated sensing element that provides a signal that is proportional to the amount of oxygen in the exhaust. Engineered and manufactured with a robust sensor design that increases sensor longevity. 'True Direct-fit' OE connectors and harness, plus threads pre-coated with anti-seize compound right out of the box, make installation easy. Seared protection tube due to 100% functional quality test.

Review: 100% genuine Bosch sensor, made in Germany, at a great price. - Extremely pleased with this purchase for my 2002 VW Passat 1.8T. It is almost one fifth of the price from my local garage - but is exactly the same product! I was a bit dubious at first, but I searched on the Bosch website for my vehicle model number - and up came this part number. So I was confident that it was the correct part, but thought maybe it was manufactured elsewhere, so perhaps not so good quality? But I was wrong! This is a 100% genuine full-spec Bosch part manufactured in Germany. See the pictures of the packaging I have uploaded. The sensor comes complete with a full installation kit and has the proper connector already fitted. Some other sensors don't include this and you have to fit the connector yourself. It is now installed in my car, and it works perfectly. I wasn't sure if my sensor needed replacing but after replacing half a dozen other components in the vacuum system and still having the MIL light coming on, I thought it worth a try, especially at this amazing price. A couple of tips if you are thinking of buying one. Firstly, do NOT remove the protective cap from the sensor until you intend to install it. It is there to keep the special lubricant in place so you can remove it in the future. Secondly, you must remove the old sensor whilst the exhaust is hot otherwise you can't get it out. Be very careful, protect your arms and hands from burns from the exhaust and engine block. Thirdly you must use a special 22mm oxygen sensor socket spanner, they are about £10 - but its impossible to remove without one. It appears to be a recommendation to replace this (upstream) sensor every 100K miles. My car has only done about 65K but the sensor had been contaminated with a silicon sealer used to seal the rocker gasket. Oxygen sensors do NOT like silicon - mine worked but was slow response, reduced the engine power output and caused lumpy idling. Much better now.
Review: good - good

## Features

- Bosch Premium Wideband A/F Oxygen (O2) Sensors are designed for use with aftermarket high performance wideband kits
- Advanced Wideband sensing element for an exact air/fuel measurement vs. a typical oxygen sensor which simply sends a rich or lean signal
- Robust sensor design increases sensor longevity
- Seared protection tube due to 100% functional quality test
- True Direct-fit' OE connectors and harness; threads pre-coated with anti-seize compound right out of the box

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B009J3EXGQ |
| Best Sellers Rank | 121,959 in Automotive ( See Top 100 in Automotive ) 534 in Car Oxygen Sensors |
| Brand | Bosch |
| Customer Reviews | 4.4 out of 5 stars 3,679 Reviews |
| Global Trade Identification Number | 00028851170253 |
| Included Components | Replacement Parts - Underhood;Engine Management;automotive-ambient-air-temperature-sensors |
| Item Dimensions | 14.8 x 10 x 5.6 centimetres |
| Item Type Name | Premium Wideband Air/Fuel Oxygen Sensor (1-Pack) |
| Item Weight | 0.39 Pounds |
| Item dimensions L x W x H | 14.8 x 10 x 5.6 centimetres |
| Item height | 2.2 inches |
| Item weight | 0.39 Pounds |
| Manufacturer | Bosch |
| Material | Metal |
| Measurement Accuracy | HIGH |
| Measurement accuracy | HIGH |
| Measuring Range | 10:1 to 20:1 air/fuel ratio |
| Model Number | 17025 |
| Mounting Type | Flange Mount |
| Output Type | Physical |
| Product Warranty | No |
| Specific Uses For Product | Oxygen Sensor |
| Style | Oxygen Sensor |
| Style Name | Oxygen Sensor |
| UPC | 028851170253 |
| Upper Temperature Rating | 850 Degrees Fahrenheit |

## Product Details

- **Brand:** BOSCH
- **Item dimensions L x W x H:** 14.8 x 10 x 5.6 centimetres
- **Material:** Metal
- **Item weight:** 177 g
- **Style:** Oxygen Sensor

## Images

![Bosch 17025 Oxygen Sensor - Image 1](https://m.media-amazon.com/images/I/41XE1HwSbJL.jpg)
![Bosch 17025 Oxygen Sensor - Image 2](https://m.media-amazon.com/images/I/51QuoWwBHFL.jpg)
![Bosch 17025 Oxygen Sensor - Image 3](https://m.media-amazon.com/images/I/51iY8b53q5L.jpg)
![Bosch 17025 Oxygen Sensor - Image 4](https://m.media-amazon.com/images/I/61XEHEIPOzL.jpg)
![Bosch 17025 Oxygen Sensor - Image 5](https://m.media-amazon.com/images/I/61pkiOcYfCL.jpg)

## Questions & Answers

**Q: I have a doubt which one has if the 17011 or the 17025 or if they are the same sensor and only the code number changes.  Which of the two is compatibl**
A: 17025 is a LSU 4.9 sensor 0-5v wideband reading

**Q: Is it normal for these to come "used" looking?  The sensor end was very sooty and had obviously been run in a very rich exhaust?**
A: These say on this page, but all the ones I've seen look used because they are each tested and "burned in", meaning they're required to perform under normal operating temperatures for some significant period of time without flaw or failure of any kind.
 I used to work in a place that made microwave radio equipment and we had to burn in each one, like 24 at a time, overnight, monitored by computer and tested at it's coldest range too. The data was monitored continuously and if any parameter drifted, then it was torn apart and adjusted and sent back through the burn-in test again, repeat. It seems like there's always one that can't be fixed. Those were recycled.
   But anyway, an oxygen sensor is required to work in some extreme temperatures. Heat can change things if even the slightest thing is vulnerable or flawed in any way.
So, in my opinion, reading comprehension, plus experience, I'd be happy if I got one that looks burned in. If these other comments are correct, and they get shiny new looking sensors, that means YOU are their QC department.  All the pictures of every sensor from every vendor looks browned.
     That said, you said it looks "sooty" and carbon comes off on your hands?  That could mean that it had been installed in a rich running car, true.  However, it may be that they didn't clean it after burn-in during QC. However, it better not be shiny as a brand new penny, because that means you're their QC department. I have had that happen. They kept asking for more pictures. I felt like I should be on the payroll, but in China, ..?
   Anyway, It's going to be a judgement call.  I'm going to say that these should be tested in sooty conditions because that could happen on a cold day in any car.  But it's pretty obvious that nobody cleaned it off.  The question is why they didn't. If you were sneaking a bad part in a box, you'd think you'd clean it off, right?  If I were you, I'd go with my gut feeling about it.  If it's one of the more accessible ones, why not try it? It's not like you'll make it more sooty. 
    One reviewer said "buy 2 so if one is bad, you can simply grab another."  It does seem to me that the hardest part is getting everything ready to replace a part and clean up after.  So maybe that is the best advice.  Buy another 1 or 2 so that if that one is bad you need only try another while you're under there.   Maybe this is why OEM parts are so expensive.  They'd better work or there's hell to pay. I never thought of it in these terms.  But a $20 one?  Get 2.  These aren't $20 so I suppose people return the extraneous ones, if they're good or bad.  Either way, they're looking for a refund.  You know?  The more I think of this, the more complex it gets.  Since you're going to return it anyway, try it but wait until you've got another, just in case.
   Sorry this was long.  It's puzzling.  Not as clear cut as the other answers.  I don't think they've seen many of these.  Even online, they're obviously burned.  It's the soot that makes it complex.

**Q: Is this tha same as  aem 30-2004 wideband?**
A: Sure is.  I buy these as replacements for the AEM

**Q: How many wires does this sensor have please? I need to attach it to an Air-fuel Gauge having 3 wires**
A: That will not work no matter how many wires it has. Afr gauges are meant to be driven by a wideband controller. The sensor is the input to the wideband controller. The sensor isnt capable of directly controlling the gauge.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 100% genuine Bosch sensor, made in Germany, at a great price.
*by P***M on 18 February 2017*

Extremely pleased with this purchase for my 2002 VW Passat 1.8T. It is almost one fifth of the price from my local garage - but is exactly the same product! I was a bit dubious at first, but I searched on the Bosch website for my vehicle model number - and up came this part number. So I was confident that it was the correct part, but thought maybe it was manufactured elsewhere, so perhaps not so good quality? But I was wrong! This is a 100% genuine full-spec Bosch part manufactured in Germany. See the pictures of the packaging I have uploaded. The sensor comes complete with a full installation kit and has the proper connector already fitted. Some other sensors don't include this and you have to fit the connector yourself. It is now installed in my car, and it works perfectly. I wasn't sure if my sensor needed replacing but after replacing half a dozen other components in the vacuum system and still having the MIL light coming on, I thought it worth a try, especially at this amazing price. A couple of tips if you are thinking of buying one. Firstly, do NOT remove the protective cap from the sensor until you intend to install it. It is there to keep the special lubricant in place so you can remove it in the future. Secondly, you must remove the old sensor whilst the exhaust is hot otherwise you can't get it out. Be very careful, protect your arms and hands from burns from the exhaust and engine block. Thirdly you must use a special 22mm oxygen sensor socket spanner, they are about £10 - but its impossible to remove without one. It appears to be a recommendation to replace this (upstream) sensor every 100K miles. My car has only done about 65K but the sensor had been contaminated with a silicon sealer used to seal the rocker gasket. Oxygen sensors do NOT like silicon - mine worked but was slow response, reduced the engine power output and caused lumpy idling. Much better now.

### ⭐⭐⭐⭐⭐ good
*by A***R on 3 October 2022*

good

### ⭐⭐⭐⭐⭐ Good quality part
*by G***Y on 17 February 2015*

Perfect example why you should choose the proper OEM part. tried a cheaper make and it caused all sorts of problems. replaced with this one and perfect driving is back again.

## Frequently Bought Together

- BOSCH 17025 Oxygen Sensor
- AEM 30-4110NS Digital Wideband UEGO Gauge without Sensor , Black , 6.025 inches

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---

*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-01-26*