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Whats the differences

sniperlover Mar 14, 2009

  1. sniperlover

    sniperlover Member

    Ok buying a new turbo and the stealers want £690 and take my old and a garage wants £520 for a recondition one.Did a research on ebay and found these :http://cgi.ebay.co.uk/96-03-AUDI-A4...14&_trkparms=72:1683|66:2|65:12|39:1|240:1318
    and this

    So whats the different,look the same but the price is different.So does that mean one last longer and the other will pack up.A bit confused :think:

    Thanks for those who helped me.
  2. evilscotsman

    evilscotsman Space Cowboy

    Hi mate, see pm, but for other folks wondering:

    K03 turbo (5303 988 0011 or 5303 988 0053)
    K03S (5303 988 0052 or 5303 988 0026)

    Same thing but more boost. Safe to swap a K03 for a K03S (borgwarner say there is no such thing as an "S" - they call them by the part numbers only)

    This is from the turbo manufacturers:

    All the following turbos have the same installation dimensions and
    thermodynamical performance. The differences are only in the actuator that
    opens the turbine bypass valve:
    K03-011 (5303 988 0011) 150 hp, 65 N actuator
    K03-026 180 hp, 85 N actuator
    K03-035 180 hp, 85 N actuator
    K03-044 150 hp, 65 N actuator
    K03-045 156 hp (Ibiza Cupra), 85 N actuator with 2 ports
    K03-049 150 hp (Sharan/Alhambra), 65 N actuator
    The 180 hp versions have an actuator with a higher opening force due to the
    higher exhaust gas pressure (which is a consequence of the higher boost
    pressure). Otherwise the valve would be pushed open by the exhaust gas

    The following turbos are a further development (since 2000) and have an
    improved and slightly larger compressor while using the same turbine (still
    with the same installation dimensions):
    K03-052 180 hp, 85 N actuator
    K03-053 150 hp, 85 N actuator
    K03-058 150 hp/180 hp, 85 N actuator

    Consequentially, putting a 180 hp turbo on a 150 hp engine will not bring
    about any change in performance, but putting on a K03-052/053/058 instead of
    the older versions will bring a slight improvement in engine efficiency.
    Additionally, with re-mapping the ECU you can achieve about 215 hp without
    danger of overspeeding the turbo. With the older turbos, 195 hp is the

    With the K04 that's also commonly used (5304 950 0001) the power output
    should not be more than 220 hp. That means, changing a K03-052/053/058
    against a K04 does not make a lot of sense.

    Hope that helps :)

    Just check your turbo's actual number on the side of it, and get a matching one.

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