ESR3690 Oil Cooler Pipe 300Tdi – Defender / Discovery I / Range Rover Classic

This Oil Cooler Pipe replacement for the 300Tdi diesel engine used across Defender, Discovery I, and Range Rover Classic models. This pipe carries engine oil between the oil filter housing and the oil cooler, ensuring stable oil temperatures and long engine life. When these lines age, they can leak, soften, or collapse internally—this replacement restores reliable oil flow and proper cooling performance.

Manufactured to OEM-style specifications, this pipe ensures a direct fit and dependable sealing on all 300Tdi configurations.

Verified Fitment (300Tdi ONLY):

• Defender 300Tdi (1994–2006)

• Discovery I 300Tdi (1994–1998)

• Range Rover Classic 300Tdi

This part does NOT fit 200Tdi, Td5, petrol V8, or any other engine type 

Supersession Part Numbers

ESR3690

FAQ

Is this pipe only for 300Tdi engines?
Yes — ESR3690/PBP500190 is specifically engineered for the 300Tdi oil cooler system.

Is this the upper or lower line?
This is typically used as the upper oil cooler pipe on 300Tdi models.

Should I replace both pipes at once?
It is recommended. The lower companion pipe is often ESR3691/PBP500200.

Part Number: PBP500190

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