Direct-fit & Universal Oxygen Sensor Application List

Also known as O2 sensors, HEGO sensors, Lambda sensors

Model	Engine Code	Chassis	Years	Price  inc VAT and P&P = in stock
Volvo S60 2.4i				Direct-fit		Universal
S60 2.4i 138-167bhp			11/2000 to 09/2003	£ 104.95
S60 2.4i	B5244S		9/2001 onwards	£ 104.95
S60 2.4i 20v 140bhp	B5244S2		09/2001 to 04/2005	£ 104.95
S60 2.4i 20v Turbo 5cyl 200bhp	B5244T3		1/2002 onward	£ 139.94
S60 2.4i 20v T5 5cyl 260bhp	B5244T5		5/2004 onward	£ 139.94

Pre-cat / Post-cat? What does that mean?

• There will be at least one sensor at the front of the vehicle, mounted into the exhaust pipe or manifold somewhere before the catalytic convertor.
  This is known as the front, pre-cat or upstream sensor.
  V-type engines (V6, V8 etc) will often have one pre-cat sensor for each bank of cylinders.
  
  
• There will then be another sensor positioned after the catalyst, known as the rear, post-cat or downstream sensor.
  Under normal circumstances, the rear sensor does not have any direct impact on the fuel mixture (and therefore the running and emissions of the engine) - it is there to offer a comparison value after the catalyst, allowing the car to monitor the performance of the cat.