Porsche 968 DME Relay Part Number: The Complete Guide

The DME (Digital Motor Electronics) relay is a critical component in your Porsche 968. It supplies power to the engine control unit (ECU) and the fuel pump. When this relay fails, the car may crank but not start, or it may stall unexpectedly. Knowing the exact Porsche 968 DME relay part number is essential for a quick and correct replacement. This guide covers the correct part number, symptoms of failure, and how to replace the relay yourself.

What Is the DME Relay in a Porsche 968?

The DME relay is a small electrical relay typically located in the fuse/relay box under the dashboard on the driver’s side of the Porsche 968. It is responsible for sending 12V power to the ECU and the fuel pump relay (or directly to the fuel pump, depending on the model year). Without it, the ECU cannot operate, and the fuel pump will not prime, leaving the engine without fuel or spark.

Why the DME Relay Fails

Over time, the internal contacts of the relay can wear out due to heat and electrical arcing. The relay may also develop cold solder joints on its circuit board (if equipped). Common failure modes include intermittent operation (stalling then restarting) or complete failure (no start). Environmental factors like moisture can also corrode the relay terminals.

Symptoms of a Failing DME Relay

A failing DME relay in a Porsche 968 often presents these symptoms:

• Engine cranks but does not start. The most common sign. The starter turns the engine, but there is no fuel pump prime and no spark because the ECU is not powered.
• Intermittent stalling. The engine may die while driving, then restart after a few minutes after the relay cools down.
• Fuel pump does not prime. When you turn the key to the "run" position, you should hear a brief whir from the fuel pump. If you don’t, the DME relay might be at fault.
• No check engine light (CEL). When the DME relay fails, the ECU does not power up, so the CEL may not illuminate during the bulb check (though this can also be caused by other issues).

It is important to note that these symptoms can also be caused by a bad fuel pump relay, a faulty ECU, or wiring issues, so proper diagnosis is necessary.

Porsche 968 DME Relay Part Number: The Exact Replacement

For the Porsche 968 (model years 1992–1995), the original DME relay part number is Porsche 944.618.227.00. This relay is used across many Porsche models of the era, including the 944 and 928. It is a four-pin relay with a plastic housing. However, there are a few important details to consider.

Alternative Part Numbers

Over the years, Porsche has superseded the original part number. The current official replacement is often Porsche 993.615.101.00 or Porsche 986.615.101.00 (also used on Boxster). Many Porsche parts suppliers list 944.618.227.00 as still available, but if you cannot find it, the 993.615.101.00 is a direct replacement. Always verify with your VIN or by checking the original relay’s markings.

Aftermarket Options

Several quality aftermarket brands manufacture relays that are functionally identical to the Porsche original. Examples include Bosch (original equipment manufacturer for many Porsche relays) and Vemo. The Bosch part number is 0 332 019 125 or 0 332 019 150 (check terminal layout). Using an aftermarket relay is generally safe as long as it matches the amperage rating (usually 30A or 40A) and pin configuration. However, for peace of mind, many owners prefer the original Porsche relay.

Where to Buy (Without Marketplaces)

You can purchase the correct DME relay from:

• Local Porsche dealership: Will have the current superseded part number (expect to pay a premium).
• Specialty Porsche parts suppliers: Online stores like Sunset Porsche Parts, Pelican Parts, or ECSTuning (note: these are not marketplaces, they are retailer websites).
• Independent automotive electrical shops: Often stock Bosch or equivalent relays.

How to Replace the DME Relay in a Porsche 968

Replacing the DME relay is a straightforward DIY task that takes about 10 minutes. Follow these steps:

1. Locate the relay. Open the driver’s door. The fuse/relay panel is under the dashboard, above the footwell. You may need to remove the lower dash panel (usually held by screws or clips). The DME relay is often one of the larger relays in the box. Consult your owner’s manual for exact location.
2. Identify the correct relay. On the relay cover, there may be a diagram. The DME relay is often labeled "DME" or "ECU". If not, look for the one that controls the fuel pump and ECU.
3. Remove the old relay. Grip the relay firmly and pull straight out. It may require a bit of force. Do not pry on the plastic.
4. Install the new relay. Align the pins with the socket and push in until it clicks into place. Ensure it is fully seated.
5. Test. Turn the ignition to "run" and listen for the fuel pump prime. Start the engine to confirm.

Important: Check for Corrosion

While you are in there, inspect the relay socket for any signs of corrosion or melted plastic. If the socket is damaged, you may need to replace it (a more involved job). A little dielectric grease on the relay pins can prevent future issues.

Final Recommendation

For a reliable fix, use the Porsche 944.618.227.00 or its superseded equivalent 993.615.101.00. If you want an aftermarket alternative, a Bosch 0 332 019 125 relay is an excellent choice. Always verify fitment with your car’s VIN or by pulling your existing relay to compare. Replacing a faulty DME relay will restore starting and running performance, and it’s one of the cheapest and easiest fixes for a no-start condition on the Porsche 968. Keep a spare in your glove box—it’s a common roadside failure that can leave you stranded.