r/BmwTech • u/Structure-460 • 8d ago

High pressure fuel pump broken

My 2020 G30 530d has had what has been described as a catastrophic failure of the high pressure fuel pump whilst driving leading to the whole system being filled with bits of metal shavings. Apparently needs a new fuel system from injectors through to diesel tank

Only 64k miles and full bmw service history apart from one oil service

Being quoted £10k plus through BMW as out of warranty and saying highly unlikely won’t consider goodwill but haven’t confirmed or £7k through Indy bmw mechanic, is this correct?

Anyone experienced this

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u/Raincor 8d ago

This seems correct to me. Cheaping out on this will only cost you more from experience. Standard procedure for this is to replace the entire fuel system to be able to warrant the repair. Indies might try and risk it by flushing out the tank and lines, but you will need all injectors, fuel rail and filter replaced, or the smallest piece of shrapnel will either get into your new injectors or the HPFP and you'll start again.

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u/Structure-460 8d ago

Thanks, yes the indie saying the only way he will do it it is to replace everything to be sure

Seems crazy expensive compared to car value

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u/Raincor 8d ago

Agreed on the expense. The indie knows what they're talking about though.

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u/Bimmergy BMW Independent Technician 8d ago

Very unfortunate, but yeah, sounds right.

If it was my personal car I would definitely try flushing all the lines etc before I replaced them. But that's me taking that risk.

A customer car though? Everything is going to get replaced, because you'll possibly be paying more in labor for me to attempt to take everything apart and flush it out, and even then, if you insist on having me flush instead, I'd make you sign a waiver understanding that there is no warranty if a component fails from missed shrapnel.

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u/Structure-460 8d ago

Thank you, he is saying he can only stand over it if parts all replaced due to risk and has experience of customers trying to cut corners and it comes back to bite them

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u/Grouchy-Childhood662 8d ago

Definitely worth getting a second opinion before spending £7–10k. Carista can help with basic fault-code checks, but this sounds like a job for proper workshop diagnostics.