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Starting at $23.95, AutoBuffy stocks 1 cruise control actuator bellows from URO. The bellows is a flexible rubber boot that seals the vacuum-operated actuator and transfers throttle cable movement to hold your Jaguar Vanden Plas at a set speed. When it cracks or collapses, cruise control loses vacuum integrity and stops engaging or holding speed entirely.
The main decision is whether to match the OE material and geometry exactly or upgrade to a more durable compound. Fit is critical — the bellows must seal against both the actuator housing and the cable linkage without binding. Confirm the bellows diameter, length, and end-fitting style against your Jaguar Vanden Plas's application before ordering.
| Option | Best for | What you get |
|---|---|---|
| OE-Equivalent Rubber Bellows | Restoring factory function on a daily driver | Direct-fit dimensions, standard neoprene or EPDM rubber, straightforward installation |
| Heavy-Duty Silicone Bellows | High-heat engine bays or extended service life | Superior heat and ozone resistance, longer lifespan than standard rubber, slightly higher cost |
| Bellows Repair Kit (bellows + clamps) | Complete vacuum seal restoration in one purchase | Replacement bellows plus the retaining clamps or tabs needed for a fully sealed repair |
| OE Remanufactured Actuator with Bellows Included | When the actuator diaphragm is also suspect | Full actuator assembly with new bellows installed, eliminates guesswork if root cause is uncertain |
Locate the cruise control actuator mounted in the engine bay, typically near the throttle body, and disconnect the vacuum line and throttle cable before sliding off the old bellows. Seat the new bellows fully onto the actuator nose and cable housing, ensuring both ends are clipped or clamped securely with no gaps. Reconnect the vacuum line and cable, verify smooth throttle movement, and test cruise control function on the road before considering the job complete.