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BMW 545i Oxygen Sensor Replacement

As is always the case, the cost of the repair depends on the make, model, and year of your car.

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$90.58 $1010.5
Average Shop Price $428
RepairSmith Price $243
Average Shop Price RepairSmith Price $ Tell us your vehicle to get a guaranteed price for your brakes from RepairSmith.

This range covers an average oxygen sensor replacement. Tell us your car to get a guaranteed price from RepairSmith.

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BMW 545i Oxygen Sensor Replacement

RepairSmith offers upfront and competitive pricing. The average cost for BMW 545i Oxygen Sensor Replacement is $270. Drop it off at our shop and pick it up a few hours later, or save time and have our Delivery mechanics come to you.

Car
Location
Quoted on
Price
2004 BMW 545i
4.4L V8 Base • 92,000 miles
Henderson NV 89044
Apr 7, 2021
$250 - $306
2005 BMW 545i
4.4L V8 • 160,000 miles
Goodyear AZ 85338
Apr 4, 2021
$242 - $296
2005 BMW 545i
4.4L V8 • 160,000 miles
Goodyear AZ 85338
Apr 4, 2021
$242 - $296
2005 BMW 545i
4.4L V8 Base • 210,000 miles
Sacramento CA 94209
Apr 2, 2021
$265 - $323
2004 BMW 545i
4.4L V8 Base • 45,000 miles
San Ysidro CA 92173
Feb 19, 2021
$221 - $270
2005 BMW 545i
4.4L V8 Base • 201,000 miles
City Of Industry CA 91715
Feb 6, 2021
$243 - $297
2004 BMW 545i
4.4L V8 Base • 28,000 miles
San Francisco CA 94188
Jan 28, 2021
$226 - $276
2005 BMW 545i
4.4L V8 Base • 78,000 miles
Anaheim CA 92808
Jan 15, 2021
$233 - $285
2005 BMW 545i
4.4L V8 Base • 12,000 miles
Valley Village CA 91607
Dec 31, 2020
$257 - $315
2004 BMW 545i
4.4L V8 Base • 196,000 miles
Long Beach CA 90801
Dec 26, 2020
$243 - $297
Last Updated:
Sep 7, 2021 1:51 PM
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What is an Oxygen Sensor?

Would you be shocked if I said it’s a sensor to measure oxygen? Okay, but it’s a bit more than that. Cars have both upstream and downstream sensors (also known as O2 sensors). Upstream oxygen sensors are placed in front of the catalytic converter, and measure the amount of oxygen in the exhaust. The car’s computer then uses that data to determine the proper air to fuel ratio.  Downstream oxygen sensors are located behind the catalytic converter, and measure the efficiency of the converter.

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Signs of a faulty Oxygen Sensor

Poor performance

No one likes poor performance. That includes you, and it certainly includes your car. Faulty O2 sensors will feed misinformation to your car’s computer. The computer will then alter the engine in a way that leads to less power, some hesitation and jerkiness, and running rough. Which means you’ll be embarrassed the next time you try to show off at a green light.

Check engine light

Oh, the check engine warning light. That light that you pretend isn’t there when it lights up. How has that worked out for you? Try as you might, ignoring a check engine light won’t make it go away. And oxygen sensor failure is a common cause of the light illuminating.

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How urgent is an Oxygen Sensor replacement?

You’re not really in any danger driving around with a busted O2 sensor. Your car will still be safe to drive. But the performance won’t be ideal, and you may fail an emissions test. You don’t need to drop everything and run straight to a repair, but get around to it when you can.

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