Replacing O2 sensors

Jul 20, 2008 | 08:55 PM

Lucas007

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Newbie

Joined: Jan 2008

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From: Atlanta

CLK430

Replacing O2 sensors

Anyone have a DIY way to replace O2 sensors?

Jul 20, 2008 | 11:31 PM

MarcusF

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Joined: Apr 2005

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From: SCV SoCal

2002 CLK430

An O2 sensor socket and a breaker bar. That's it.

Jul 20, 2008 | 11:59 PM

CurYousGee

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From: Los Angeles, California

2000 CLK 430

Hey Marcus, I may need to do this soon as well, do you have a diagram of where the O2 sensor are located? I know 2 are pre-cat and 2 are post cat for a total of 4. Also do I get the O2 sensor socket at the stealership?

thanks

Last edited by CurYousGee; Jul 21, 2008 at 12:04 AM.

Jul 21, 2008 | 04:40 PM

tnb1786

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Joined: Oct 2007

Posts: 189

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From: Orange County, CA

SS Minnow Johnson

how much did u guys pay for ur o2 sensors and which ones did u get the connector ones or the 4 wires...i bought the 4 wire ones cuz i was a cheap ******* at the time. i hear there not good though. could sumone shed sum light on this. cuz the stealership charges $150 per sensor

Jul 21, 2008 | 05:34 PM

ratha67

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Joined: Jan 2007

Posts: 112

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From: Anaheim Hills, CA

CLK430, SC430, RX330

Quote:

Originally Posted by tnb1786

I've never replaced mine. Haven't yet had to. If you get the ones without the connectors, its probably as easy as cutting the connector off the sensor that you pulled off.

But after doing an Ebay search, I'm wondering why some of the 02 sensors sold without connectors that supposedly fit our cars have 1 wire, some have 2 wires, and some have 4 wires. Don't our 02 sensors have 4 wires that go into the connectors? I know autohausaz sells them specifically depending on their locations. But it looks like the cheapest place is Ebay.

http://www.autohausaz.com/search/pro...xygen%20Sensor

I got no clue. You guys that have it figured out, be sure fill us in. I'm probably going to have to replace my 02 sensors sometime soon.

Jul 22, 2008 | 12:02 PM

Serndipity

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Joined: Nov 2001

Posts: 1,258

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From: Boston North Shore

2001 CLK320 Cabrio

Just had mine changed at dealer under 8 year / 80K warrany (by law).

See this link (listen to the audio link as well.

http://wbz.com/pages/2160021.php?

The Mercedes and Audi O2 sensors are the planar type and seem to fail with gas that has to much ethanol.

Jul 22, 2008 | 06:22 PM

MarcusF

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Joined: Apr 2005

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From: SCV SoCal

2002 CLK430

Quote:

Originally Posted by CurYousGee

The arrows point to the O2 sensors. Most automotive tool places carry an O2 sensor socket - Sears, Kragens, Pep Boys, etc. As long as the exhaust is cool, it should come right out.