Lamborghini Aventador LP770 SVJ Coupe Tank Coolant 470121407A

In 2026, the part number 470121407A refers to the Coolant Expansion Tank (Reservoir) specifically for the Lamborghini Aventador SVJ (LP770-4).

While it looks similar to the tanks in the standard LP700-4 or the S model, the “A” revision is tailored for the higher thermal demands of the SVJ’s $770\text{ CV}$ engine and its unique engine bay packaging.

1. Technical Identification

• Part Number: 470121407A

• Application: Aventador SVJ Coupe and Roadster.

• Material: High-grade reinforced plastic (PA66-GF30 or similar).

• Function: It acts as the expansion volume for the engine’s cooling system, allowing coolant to expand as it heats up and providing a degassing point for the system.

2. 2026 Market Pricing (Estimated USD)

Coolant tanks are a known “wear item” on Aventadors due to the extreme heat soak in the engine bay, which eventually makes the plastic brittle.

3. Common 2026 Issues: Why Replace It?

By 2026, many SVJs (produced 2018–2021) are reaching the age where the plastic tank begins to fail:

• Hairline Cracks: The most common failure. Small cracks form near the molded seams or the hose barbs due to constant heat cycling. You may notice a “sweet” smell or white residue (dried coolant) around the tank.

• Sensor Failure: The integrated coolant level sensor can fail, triggering a “Low Coolant” warning on the dashboard even when the tank is full.

• Cap Seal: Often, the leak is just the Pressure Cap (470121321). It is highly recommended to buy a new cap whenever replacing the tank.