Oxygen Sensor

Later model 4.0L engines have a front and rear exhaust manifold. Each manifold has their own catalytic converter. Each catalytic converter has a front and rear sensor. The placement of each sensor this application fits is outlined below.Fits the following applications: 04-06 Wrangler TJ & Unlimited with 4.0L Engine. Front exhaust manifold, before catalyst.05-06 Wrangler TJ & Unlimited with 4.0L Engine. Rear exhaust manifold, after catalyst.2004 Grand Cherokee WG (Europe) with 4.0L Engine. Front exhaust manifold, before catalyst.2004 Grand Cherokee WJ with 4.0L Engine. Front exhaust manifold, before catalyst.2004 Liberty KJ with 2.4L Engine. After catalyst.