Cat Converter replacement
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Joined: Sep 2009
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From: Northern VA
2006 E350 & 2011 ML350
Cat Converter replacement
I got CEL on.
I checked it and gave me "Main Catalyst Efficiency Below Threshold (Bank 2)" from scanner on 02 E320 4Matic Wagon. I searched the forum and found few interesting posts and have few questions.
Replacing them with Magnaflow 53005 - Magnaflow Universal Catalytic Converters
Thanks in Advance
I checked it and gave me "Main Catalyst Efficiency Below Threshold (Bank 2)" from scanner on 02 E320 4Matic Wagon. I searched the forum and found few interesting posts and have few questions.
- Which side is Bank 2?
Replacing them with Magnaflow 53005 - Magnaflow Universal Catalytic Converters
- How do O2 sensors get attached on those universal cat?
- Will it make CEL be turned off?
- If I chose to do with Universal Cat, Do I need to replace the other side also?
Thanks in Advance
Last edited by piusthedrgolf; Jun 30, 2011 at 11:38 AM.
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From: SoCal
98 Brilliant Silver E320 Wagon
The CEL will go off automatically. However, there may be a 'pending' error code which can be cleared by using an inexpensive OBD II scanner or auto shop may do it as part of installation.
Do both? Hard to say. If you have high mileage then probably since both have seen the same amount of use. If low mileage then maybe one not made as well as the other. If in California, be sure to get CARB approved ones.
Thread Starter
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From: Northern VA
2006 E350 & 2011 ML350
If it was due to faulty Mass Air Flow sensor, wouldn't it be shown in scanner? How do I check if it is bad or not?
Do I need to change O2 sensor if I decided to go with Universal cat?
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Joined: Oct 2007
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From: SoCal
98 Brilliant Silver E320 Wagon
The MAF provides an electrical signal which varies according to air flow. A faulty MAF still provides a signal but not an accurate one so the air:fuel ratio is wrong -- usually too rich.
I once saw a detailed test protocol for the BOSCH MAF's but it is way beyond the average DIYers equipment and skillset. MAF's last about 100K and cost about $100 so I think most people just replace it if there is an issue.
You didn't say if you have a OBD II scanner. If you do, then I would suggest scanning the car every so often to look for codes common to the MAF or O2 sensors. If you don't you might consider getting one if you are inclined to do you own testing. Sometimes codes are temporary and after clearing them they don't come back.
I once saw a detailed test protocol for the BOSCH MAF's but it is way beyond the average DIYers equipment and skillset. MAF's last about 100K and cost about $100 so I think most people just replace it if there is an issue.
You didn't say if you have a OBD II scanner. If you do, then I would suggest scanning the car every so often to look for codes common to the MAF or O2 sensors. If you don't you might consider getting one if you are inclined to do you own testing. Sometimes codes are temporary and after clearing them they don't come back.
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
The code
you have is for the primary cat located between both pre and post o2 sensors on the drivers side of the engine.
The universal cat you are looking to buy is the secondary cat. Wrong item.
Look at the diy section on w210 forum www.benzworld.org
for model of universal primary cat.
Where are you located?
The universal cat you are looking to buy is the secondary cat. Wrong item.
Look at the diy section on w210 forum www.benzworld.org
for model of universal primary cat.
Where are you located?
Thread Starter
Junior Member
Joined: Sep 2009
Posts: 24
Likes: 0
From: Northern VA
2006 E350 & 2011 ML350
you have is for the primary cat located between both pre and post o2 sensors on the drivers side of the engine.
The universal cat you are looking to buy is the secondary cat. Wrong item.
Look at the diy section on w210 forum www.benzworld.org
for model of universal primary cat.
Where are you located?
The universal cat you are looking to buy is the secondary cat. Wrong item.
Look at the diy section on w210 forum www.benzworld.org
for model of universal primary cat.
Where are you located?
Thread Starter
Junior Member
Joined: Sep 2009
Posts: 24
Likes: 0
From: Northern VA
2006 E350 & 2011 ML350
According to you,
They are available for left ,right ,front, back for $ 50 or so each,oem match,new universal O2 $65 each you splice in the cats if you weld or have a muffler shop do it,you splice the connectors of the old O2 to the univ O2( bosch oem).$ 460 in parts another $100-$125 labor at the muffler shop if you can't weld. $560 ish both sides new and new O2's to boot.
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E320
I have an 00 E320 mine went bad 3 months after i bought the car. I went to this local place here in TAMPA FL and paid 192.00 to change it from 2007 in till today i have had no problems. Mine was the passanger side catalyc. The place where i took it to was RAINBOW MUFFLERS. Check the sensor located by the AIR filter that goes inside the plastic tube that went bad at first on mine i change it i bought that Sensor in ebay for 92.00.
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