Rear oxygen sensor (B235R, B205L/R)
 
  
 
 
  
   
    
     |  | Rear oxygen sensor (B235R, B205L/R) | 
   
  
  
   
   
    
    
    
    
    
   
   
    
   
   
   
    
     
      
       | 1. | Remove the top engine cover. 
 
   
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       | 2. | Detach the connector from the holder. 
 
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       | 3. | Cut the cable tie and pull out the cable. 
 
   
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       | 5. | Pull down the cable and remove the oxygen sensor. 
 
 
          
           
            | Important |  
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              The leads must not be twisted. The oxygen sensor is highly sensitive to knocks and blows and must be handled with care.
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       | 1. | Coat the oxygen sensor's threads with Molycote 1000 (30 20 971) to prevent binding. 
 
 
          
           
            | Important |  
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              The oxygen sensor is sensitive to knocks and blows and must be handled with care. It is important to ensure that the connection between it and the nipple is gastight.
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            | Important |  
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              Chemicals such as contact spray and grease must not come into contact with the oxygen sensor connectors.
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       | 2. | Fit the oxygen sensor. 
 Tightening torque: 55 Nm (41 lbf ft)
 
 
   
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       | 3. | Run the cable as far up as possible. Lower the car. 
 
 
          
           
            | Important |  
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              Watch out for sharp edges, hot components, etc.
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       | 4. | Run the cable forward and plug in the connector. 
 
   
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       | 5. | Secure the cable to the water pipe with a cable tie. 
 
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       | 6. | Fit the top engine cover. 
 
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