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AJ811728 - Crankcase Breather Pipe – V8 Petrol

- €100,70
€100,70
€100,70 - €100,70
€100,70
OEM Part
OEM: Made by an Original Equipment Manufacturer. This part is made by an original equipment manufacturer or under their license, ensuring compatibility and quality.
Brand Jaguar
Crankcase Breather Pipe for the 3.5/4.2L V8 petrol engine (AJ-series), in both naturally aspirated and supercharged form.

Part of the crankcase ventilation system, the pipe carries blow-by gases from the crankcase to the induction side of the engine so they are drawn back in and burned, maintaining correct crankcase pressure.
Fitment Notes JAGUAR — Crankcase breather pipe. Fits 3.5/4.2L V8 Petrol (AJ28/AJ33/AJ40), NA and Supercharged. Models: S-TYPE (X200), XF (X250), XJ (X350 2003-2009), XK (X150)
Alternative Codes
AJ811728

Available to order 2–3 weeks

Not currently in stock. Order now — typically ships within 2–3 weeks.

Need it faster? Contact us about express import (2–5 business days).

When will my order arrive?

This item is ordered from our supplier on request. Typical lead time is 2–3 weeks from order confirmation.

  • Netherlands / Belgium / Germany: 2–4 working days after dispatch.
  • Other EU countries + UK: 4–8 working days after dispatch.
  • Outside EU/UK: contact us for an estimate.

Need it faster? Express import available in 2–5 business days — contact us before ordering.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What does the crankcase breather pipe do?
The crankcase breather pipe carries blow-by gases from the crankcase to the induction side so they're drawn back in and burned, maintaining correct crankcase pressure on the Jaguar 3.5/4.2L V8 petrol engine in NA and supercharged form.
What happens when the breather pipe fails?
A cracked or blocked crankcase breather pipe typically causes rough idle, oil leaks from seals under crankcase pressure, or oily residue around the pipe. These pipes go brittle with age and heat, so inspect the full run when diagnosing pressure faults on the V8.
Which Jaguar models use this breather pipe?
This crankcase breather pipe fits Jaguar S-TYPE (X200), XF (X250), XJ (X350 2003-2009) and XK (X150) with the 3.5/4.2L V8 petrol engine (AJ28/AJ33/AJ40). Part number AJ811728.