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Thread: E60 523i bad idle when warm

  1. #1
    BMWHaus Contributor
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    E60 523i bad idle when warm

    Bought a 06 523i auto with this fault.its fine cold but when hot the idle is low and up and down.touch accelerator and perfect.no misfire.it does have faint whistle noise from engine when its doing the bad idle.booked to get codes read next week but curious.any thoughts.its got 195000 kilometers on it

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  2. #2
    BMWHaus Guru
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    Did you check the air inlet rubbers for cracks ?
    Current Daily: 2008 Lexus GS300 Sport F/L
    Current: E39 525i M Sport (Titan Silver)
    Previous: E34 520i SE (Orient Blue)

  3. #3
    BMWHaus Contributor
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    Quote Originally Posted by Big H View Post
    Did you check the air inlet rubbers for cracks ?
    Haven't had time yet but will in few hours.

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  4. #4
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    I had something similar on n53 engined 530i a few months back and it turned out to be the CCV. As per other suggestion, start with the simple in terms of intake air leaks in bellows, etc.
    Current: BMW 530e M-Sport - '17, BMW 630i Sport auto - '07, BMW 325i Coupe - '93, BMW Z4 2.5si Auto - '07, '90 BMW 316i Lux.

    Previous: BMW 328i Coupe - '96, BMW 530i SE auto - '07, BMW 530i Sport auto - '02, BMW 318i SE Touring - '07, BMW 330Ci Sport - '04, BMW 520d SE - '11, BMW 523i SE - '00, BMW 328i SE Touring - '00, BMW 523i SE - '97, BMW 323i SE - '98, 330Ci - '00, 325i Coupe - '93, 318Ci - '01, 316iSE - '98, 325iSE 2dr - '91, 320i Conv - '91, 325i Coupe - '92, 320i 2dr - '91.

  5. #5
    BMWHaus Contributor
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    Quote Originally Posted by dergside View Post
    I had something similar on n53 engined 530i a few months back and it turned out to be the CCV. As per other suggestion, start with the simple in terms of intake air leaks in bellows, etc.
    Thanks.I'll look


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