If you own a Porsche 944 and your cruise control has stopped working, you might be searching for part number 944 750 151 Z0. This specific part is the cruise control amplifier or control unit for many 944 models. In this guide, we'll explain what it does, which cars it fits, how to spot a failing unit, and how to choose a replacement. Whether you're a DIY owner or planning to visit a shop, this information will help you get your cruise control back in working order.
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What Is the Porsche Part 944 750 151 Z0?
The part number 944 750 151 Z0 refers to the electronic cruise control module for the Porsche 944. This module is the brain of the speed control system. It receives input from the steering wheel buttons, the speed sensor, and the brake/clutch switches. It then sends signals to the actuator that adjusts the throttle to maintain a set speed. The module is a sealed electronic box, typically located behind the dashboard near the driver's footwell or under the hood on some models.
Function and Location
The cruise control module processes signals and controls the vacuum or electric actuator that moves the throttle linkage. On the Porsche 944, the module is often mounted on the left side of the engine compartment, near the firewall, or behind the glovebox. Depending on the production year, the location may vary. The module is connected to a harness with several wires. If you are inspecting yours, look for a small black box with the part number printed on a sticker.
Compatibility and Fitment
Not all Porsche 944 models use the same cruise control module. Part 944 750 151 Z0 is specifically for certain years and engine configurations.
Which Porsche 944 Models Use This Part?
This module is commonly used on 1984–1988 Porsche 944 models with the 2.5L four-cylinder engine. It may also fit some early 944 Turbo models, but always verify compatibility with your vehicle's VIN or production date. The part was also used in some 928 models of the same era, but cross-checking is essential.
Cross-Reference Part Numbers
If you cannot find the exact 944 750 151 Z0, there are equivalent part numbers that may work. Common cross-references include 944 750 151 Z1 (updated version) and 944 750 151 Z2 (newer revision). Also, some aftermarket manufacturers offer remanufactured units branded under Bosch or other OEM suppliers. Always compare the connector shape and pin layout before purchasing.
Signs of a Failing Cruise Control Module
When the cruise control module fails, you will notice specific symptoms. Here's what to look for.
Symptoms
The most common symptom is that the cruise control will not engage or will drop out randomly. Other symptoms include the cruise control light on the dashboard not illuminating, the speed surging while engaged, or the system failing to set a speed. Sometimes the module fails completely, causing no response at all when pressing the buttons.
Diagnosis
Before replacing the module, it's wise to check other components. Test the steering wheel buttons for continuity, inspect the brake and clutch switches, and verify the speed sensor signal. A faulty module often requires a multimeter test or swapping with a known good unit. If other components check out, the module is likely the culprit.
Replacement Options
When you need a new module, you have several choices: OEM new, OEM remanufactured, aftermarket, or used.
OEM vs Aftermarket
Genuine Porsche parts (OEM) are manufactured to the original specifications. They are reliable but often expensive and may be discontinued. A remanufactured OEM unit is a good compromise—it's rebuilt to factory standards and typically comes with a warranty. Aftermarket modules are less common for this part, but some brands like Bosch offer compatible units. Be cautious with generic aftermarket parts; they may not match the exact performance or plug compatibility.
Used vs New
Used modules from salvage yards or online sellers can be affordable, but they carry risk. Age and potential hidden damage make used units a gamble. If you go this route, ask about the donor car's mileage and condition. New old stock (NOS) is rare but ideal if you find it. For most owners, a remanufactured unit offers the best balance of cost and reliability.
Buying Guide for Part 944 750 151 Z0
Now that you know what you need, here's how to make a smart purchase.
Where to Look
Specialized Porsche parts retailers and online forums are good sources. You can also check with independent European auto parts stores. Avoid vague listings that do not show the actual part number or photos. Legitimate sellers will have clear images of the module and its connectors.
Pricing Expectations
Prices vary widely. A used module may cost between $50 and $150. Remanufactured units range from $150 to $350. New old stock can exceed $400 if available. Be wary of deals that seem too good to be true—they often are. Compare prices across multiple sellers to gauge the market rate.
What to Check Before Purchase
Always confirm that the part number matches exactly: 944 750 151 Z0, Z1, or Z2. Ask the seller about the return policy and warranty. If buying used, request a photo of the sticker and a clear shot of the connector. Also, check that the pins are not bent or corroded. For remanufactured units, ask about the testing process and warranty period.
Installation Tips
Replacing the cruise control module is a manageable DIY job for most 944 owners, but caution is needed.
Safety Precautions
Disconnect the battery negative terminal before working on any electrical components. The module is sensitive to static electricity—ground yourself before handling. Work in a clean, dry area to avoid contaminating connectors.
Basic Steps
- Locate the module (consult your service manual).
- Unplug the harness connector.
- Remove the mounting screws or clips.
- Install the new module in the same orientation.
- Reconnect the harness securely.
- Reconnect the battery and test the cruise control.
If the module is under the dashboard, you may need to remove panel covers. Take your time to avoid damaging the wiring.
Final Recommendation
For most Porsche 944 owners, the best option for replacing part 944 750 151 Z0 is a remanufactured OEM unit from a reputable supplier. It offers reliability close to new at a lower price, and it often comes with a warranty. Before buying, verify compatibility with your car's year and engine. If you are on a tight budget, a used module from a reliable salvage yard can work, but be prepared for the possibility of failure. Avoid no-name aftermarket modules unless they have clear positive feedback in Porsche forums. By following this guide, you can confidently restore your cruise control and enjoy comfortable highway drives in your classic Porsche 944.