Faulty Glow Plug: VW 2.5 TDI BDG Issues

Good day.

Sure, here is the translation of the text from German to English:

"The following is the initial situation:"

In my Audi A4 2.5 TDI (manufactured in October 2004) with engine code BDG, one glow plug is defective (its resistance is close to zero).

The engine has 283,000 kilometers on it. The last time all six glow plugs were replaced by Audi was at approximately 203,000 kilometers, which was in January 2014.

I asked my Audi workshop master whether it's necessary to replace all six spark plugs or just the faulty one. His answer was that only the defective one needs to be replaced for this engine type. However, it's important to use the same brand and type of spark plug.

I'm now hearing from many A4 diesel drivers that you should always replace all six spark plugs at the same time.

What do you think about this? I would really appreciate a short feedback (survey), and I'd be happy to hear your explanations as well.

"Thank you very much!"
Hi netrocker,

I would base the decision on the remaining lifespan and accessibility of the remaining candles.

If the remaining spark plugs have only been used for 80,000 km and are easily accessible, I would only replace that one spark plug.

However, if everything needs to be disassembled to access the spark plugs, I would replace them all.

However, I don't know what your engine looks like.

Greetings.
Sure.

Here is the translation of the text from German to English:

"Guste" means "gust" in English. It can also be used as a verb, meaning "to gust."

Hello,

So, I'm not worried about the accessibility, but rather about whether the candles are stuck and will break off when you try to remove them. As is well known, aluminum, metal, and heat are not a healthy combination .

Although the spark plugs were replaced in my AUDI four years ago, and I can assume they were tightened to 8 Nm, I'm still not entirely confident. If one of them breaks off and the cylinder head needs to be removed, the cost would no longer be justified considering the car's value.

Hello.

A few days beforehand, apply some WD-40, and then be sure to open it while the engine is warm.
Apply the correct torque when installing it on a cold engine.
It's actually mentioned somewhere in this forum if you search for "changing spark plugs."

I would only replace the defective one.

Best regards,
Mfg Mpire

Thank you for the feedback!
I ended up having all 6 spark plugs replaced at the Audi dealership.
Cost: 300 Euros!

I sprayed some WD-40 into the spark plug well yesterday.
The mechanics said that the spark plugs would come out easily.

Thank you very much and best regards.
Andi.