C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Engine Wire Harness, O2 sensor --- Big money

Thread Tools
 
Search this Thread
 
Rating: Thread Rating: 2 votes, 5.00 average.
 
Old 09-25-2008, 08:02 PM
  #1  
Newbie
Thread Starter
 
dredgemont's Avatar
 
Join Date: Sep 2008
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
2003 C230 Compressor
Unhappy Engine Wire Harness, O2 sensor --- Big money

Need advise badly.

I have a 2003 C230 Compressor. The engine light came on. Took it to Autozone and read the code. It indicated O2 sensor. Took it to the dealer and the dealer wants to replace the O2 sensor as well as the entire engine harness and is asking for $1600. BTW what is this harness? I am in Tampa FL. Does anyone know what a cheaper, economical way for me to fix this car? Please help.
Old 09-25-2008, 08:12 PM
  #2  
Super Moderator

 
Glyn M Ruck's Avatar
 
Join Date: Jun 2008
Location: Llandudno, Cape Town, South Africa
Posts: 19,941
Received 175 Likes on 142 Posts
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Originally Posted by dredgemont
Need advise badly.

I have a 2003 C230 Compressor. The engine light came on. Took it to Autozone and read the code. It indicated O2 sensor. Took it to the dealer and the dealer wants to replace the O2 sensor as well as the entire engine harness and is asking for $1600. BTW what is this harness? I am in Tampa FL. Does anyone know what a cheaper, economical way for me to fix this car? Please help.

Engine harness is all the wiring. Search the forum & DIYs - there is plenty on changing O2 sensors. They are not expensive & you can do it yourself. If you have trouble finding come back and ask. Change O2 sensor/s. There are 2. Leave the harness & see what happens. If sensor change fixes code then leave well alone.

Why do they want to change the harness? Did they say anything about leaking cam sensors?
Old 09-26-2008, 09:17 AM
  #3  
Super Member
 
amanonfire's Avatar
 
Join Date: May 2008
Posts: 573
Likes: 0
Received 1 Like on 1 Post
W203
Search "leaking cam sensors", you can fix this for $6.
Old 09-26-2008, 09:43 AM
  #4  
Senior Member
 
JLD2k3's Avatar
 
Join Date: May 2006
Location: VA
Posts: 268
Likes: 0
Received 1 Like on 1 Post
2002 C320
Originally Posted by Glyn M Ruck
Engine harness is all the wiring. Search the forum & DIYs - there is plenty on changing O2 sensors. They are not expensive & you can do it yourself. If you have trouble finding come back and ask. Change O2 sensor/s. There are 2. Leave the harness & see what happens. If sensor change fixes code then leave well alone.

Why do they want to change the harness? Did they say anything about leaking cam sensors?
+1

I put in new O2 sensors last night (4 on the C320) and it is not hard at all. $150 at Advance and you really only need a 7/8 wrench.
Old 09-26-2008, 01:56 PM
  #5  
Super Moderator

 
Glyn M Ruck's Avatar
 
Join Date: Jun 2008
Location: Llandudno, Cape Town, South Africa
Posts: 19,941
Received 175 Likes on 142 Posts
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Originally Posted by amanonfire
Search "leaking cam sensors", you can fix this for $6.
Not if oil has ruined the main harness. Catch it early & the pigtails will fix.
Old 09-26-2008, 04:25 PM
  #6  
MBWorld Fanatic!
 
pshek's Avatar
 
Join Date: Jul 2004
Location: Diamond Bar & Anaheim, CA
Posts: 1,194
Likes: 0
Received 2 Likes on 2 Posts
2003 C-Class Sportcoupe
Engine wiring harnesses are expensive. Best to avoid having to replace it. Maybe if you took it to an indy shop and have them repair/clean the wiring and connections, fix any and all oil leaks, then you might be able to keep the existing wiring. Most common problem is tranny oil leaking and fouling the wiring harness to the TCM. O2 sensors are easy to replace, wiring is not because it is labor intensive.
Old 09-26-2008, 04:28 PM
  #7  
Super Moderator

 
Glyn M Ruck's Avatar
 
Join Date: Jun 2008
Location: Llandudno, Cape Town, South Africa
Posts: 19,941
Received 175 Likes on 142 Posts
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Originally Posted by pshek
Engine wiring harnesses are expensive. Best to avoid having to replace it. Maybe if you took it to an indy shop and have them repair/clean the wiring and connections, fix any and all oil leaks, then you might be able to keep the existing wiring. Most common problem is tranny oil leaking and fouling the wiring harness to the TCM. O2 sensors are easy to replace, wiring is not because it is labor intensive.
+1
Old 09-26-2008, 08:01 PM
  #8  
Super Member
 
amanonfire's Avatar
 
Join Date: May 2008
Posts: 573
Likes: 0
Received 1 Like on 1 Post
W203
The engine harness is $350 and takes 6 hours to replace. O2 sensors are $80-100 and take about 30 mins to replace.

Any competent DIYer can remove the engine harness in 1 hour. Remove it, soak it in degreaser overnight, let it dry out the next day, replace. Spray all sensors and ECU with contact cleaner.

Buy new cam sensors and isolation wires. This fix will cost ~$200 and a few hours on the weekend.
Old 09-26-2008, 11:06 PM
  #9  
MBWorld Fanatic!
 
C230 Sport Coup's Avatar
 
Join Date: Jun 2002
Location: So. Oregon Coast
Posts: 6,791
Received 113 Likes on 103 Posts
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort (What the heck, it gets 38 mpg!)
Can I get an AMEN! Yowza!
Originally Posted by amanonfire
The engine harness is $350 and takes 6 hours to replace. O2 sensors are $80-100 and take about 30 mins to replace.

Any competent DIYer can remove the engine harness in 1 hour. Remove it, soak it in degreaser overnight, let it dry out the next day, replace. Spray all sensors and ECU with contact cleaner.

Buy new cam sensors and isolation wires. This fix will cost ~$200 and a few hours on the weekend.
Old 09-27-2008, 06:20 AM
  #10  
Super Member
 
amanonfire's Avatar
 
Join Date: May 2008
Posts: 573
Likes: 0
Received 1 Like on 1 Post
W203
Originally Posted by C230 Sport Coup
Can I get an AMEN! Yowza!
Thanks. I like to DIY yet recognize some projects are beyond even my capability or comfort level. My car goes in next week for rear diff seals, not incredibly hard to do, yet so much easier with a lift, air/impact tools, and a press.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 2 votes, 5.00 average.

Quick Reply: Engine Wire Harness, O2 sensor --- Big money



All times are GMT -4. The time now is 10:21 AM.