Apart from the ABS light, the rest of the symptoms you’ve experienced were nearly identical to mine before I replaced my OVP relay. Once replaced (alongside new Bosch glow plugs), I never had a similar problem since.
Had all sorts of issues. The glow plug circuit is extremely finicky.
Replaced glow plugs with matched Bosch plugs and replaced glow plug bus bar with 10 gauge wire, checked all plug currents with a DC current clamp to ensure they were all drawing the specified amperage.
I replaced the glow plugs and that solved the issue she has been firing right up for a few weeks now!
From what I understand the afterglow on the Duraterms works because they self regulate voltage per each plug, not allowing them to burn out. It virtually eliminated rough idle on the cold start.
I have installed these in my 81 and they work very well. Start it up and let the plugs sit on for an additional 30-45 seconds.. pretty much does away with the rough cold starts.
As far as glow plugs, I would consider the following to be the better ones on the market: Bosch Beru Monark NGK
Just a cautionary note for whatever you want to do with it. These will likely not be Bosch quality; could be Vespark from Taiwan or something from China.
Two months ago I changed all the glow plugs with Bosch plugs. The glow system works great.
As for the correct plug, I got a set of bosch plugs for it - the part number was the same as the ones I took out, so I am assuming this is the correct plug.
Write your review about glow plug Bosch
Help others - share your experience with this part.
Voted AGAINST engine oil RAVENOL on the rating page
The brake pads OEM Alfa Romeo got the first review!
The brake caliper OEM BMW got the first review!
The brake pads OEM Infiniti got the first review!
For wiper blades PIAA already 100 reviews.
For battery Energizer already 25 reviews.
In the rating best water pump already 12 brands participate!
In the rating best timing belt already 13 brands participate!
In the rating best head gasket already 3 brands participate!
In the auto rating oil filter for Volkswagen Passat already 5 brands participate!
In the auto rating brake pads for Mazda 5 already 10 brands participate!
In the auto rating tires for Subaru Outback already 50 brands participate!
For cabin filter Fram already 25 reviews.
Voted AGAINST engine oil RED LINE on the rating page
Voted AGAINST engine oil PENNZOIL on the rating page
The brand is registered in Germany.
In March 2026, PartReview has a mixed opinion of Bosch glow plug. PR Score — 83 out of 100, based on 10 reviews and 31 vote. 8 positive reviews, 1 neutral review, 1 negative review. Average rating — 4 (out of 5). Votes: 26 up, 5 down.
Users also evaluated the qualities of Bosch glow plug:
See which car brands and models owners choose Bosch glow plug for. Below are car-specific ratings where this part is in the Top-3:
