Description
Product Overview
The Denso 5399915-Kit supports the replacement of oxygen sensors in various vehicles. This kit provides an OE-level, all-in-one set of matched components designed for precise fitment and reliability. Symptoms that may indicate the need for this kit include poor fuel economy, increased emissions, and diagnostic trouble codes such as P0131 or P0137, which relate to sensor performance. The Denso 5399915-Kit includes both downstream oxygen sensors and upstream air/fuel ratio sensors, addressing multiple aspects of the vehicle’s emission system.
Kit Contents
- 2 x Denso – (234-4951) Downstream Oxygen Sensors – OE Style
- 2 x Denso – (234-9125) Upstream Air / Fuel Ratio Sensors – OE Style
Cross Reference Numbers
This Denso 5399915-Kit is equivalent to or replaces the following part numbers: 234-4951, 234-9125.
Vehicle Compatibility
- Jaguar S-Type 3.0 V6 (2006–2008)
- Jaguar S-Type 4.2 V8 (2006–2008)
- Jaguar Super V8 4.2 V8 (2006–2009)
- Jaguar Vanden Plas 4.2 V8 (2006–2009)
- Jaguar XJ8 4.2 V8 (2006–2009)
- Jaguar XJR 4.2 V8 (2006–2009)
- Jaguar XKR 4.2 V8 (2006–2009)
- Jaguar XK 4.2 V8 (2007–2009)
- Jaguar XF 4.2 V8 (2009–2010)
- Jaguar XF 5.0 V8 (2010–2011)
- Jaguar XFR 5.0 V8 (2010–2011)
- Jaguar XK8 4.2 V8 (2006)
This kit also fits other applications. Please use the vehicle selector tool to verify compatibility before purchase.
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Frequently Asked QuestionsWhat symptoms may indicate the need for a new oxygen sensor?
Common symptoms include poor engine performance, increased fuel consumption, and the illumination of the check engine light, often related to DTCs like P0131 or P0137.
How do I know if my upstream or downstream sensor is failing?
Downstream sensors typically affect emissions control, while upstream sensors can impact fuel mixture and performance. Diagnostic trouble codes will help identify the failing sensor.
What is the difference between upstream and downstream oxygen sensors?
Upstream sensors monitor the air-fuel mixture before it enters the catalytic converter, while downstream sensors check the efficiency of the catalytic converter after exhaust gases have passed through.
Can replacing oxygen sensors improve fuel economy?
Replacing faulty oxygen sensors can lead to better fuel economy by ensuring the engine runs at an optimal air-fuel ratio, though results may vary based on vehicle condition.
How often should oxygen sensors be replaced?
Oxygen sensors should typically be replaced every 60,000 to 100,000 miles, but it’s essential to monitor for symptoms indicating failure.
Order Denso 5399915-Kit today to support a complete, well-matched repair for your vehicle.
Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.
