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Thread: Bosch LSU 4.9 Sensor

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    Founder Nick's Avatar
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    Bosch LSU 4.9 Sensor

    Guys, what are your takes on the Bosch LSU 4.9 Sensor? Just the sensor itself. I've seen a few posts and reports that they die. This the case or it really comes down to the controller? Or install, or both?
    '06 Subaru Liberty Wagon 3.0R-B
    '03 Lexus IS300 2JZGTE

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    Registered User THE CHIEF's Avatar
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    Mine lasted 2 years of daily use on e85 and only failed because I left the ignition on for extended periods while trouble shooting stupid stereo system. It died 1 or 2 days later. They don't like being switched on if the car is not running or not being powered when the car is running. I have since rewired it so it only switches on when engine is running. It was being controlled by a mtxl which apparently isn't the best controller. The sensor would still be alive if I didn't cook it. 4.9 are OEM in some vz/ve moos and lw focus amongst others. Would think they're a proven thing when used by OEM's.

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    No trouble so far with ours in the track car, had it about a year running on 98

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    That's Sir Cunt to you... krisr's Avatar
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    I got 2 in my HQ using techedge 2j9 controllers. I think the last set of sensors went a couple years.
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    Registered User dnegative's Avatar
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    Positioning plays a bit part if they are too cold or hot;
    But they fuck out in OEM applications fairly regularly, lifespan is 3-8 years?
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    Fuck I'm retarded

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    sack riding 10sec rx7's Avatar
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    Quote Originally Posted by THE CHIEF View Post
    Mine lasted 2 years of daily use on e85 and only failed because I left the ignition on for extended periods while trouble shooting stupid stereo system. It died 1 or 2 days later. They don't like being switched on if the car is not running or not being powered when the car is running. I have since rewired it so it only switches on when engine is running. It was being controlled by a mtxl which apparently isn't the best controller. The sensor would still be alive if I didn't cook it. 4.9 are OEM in some vz/ve moos and lw focus amongst others. Would think they're a proven thing when used by OEM's.
    VZ to VE moos are 4.2... the 4.2 is way more reliable than the 4.9..
    im a cunt
    and apparently i dont know shit...

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    Registered User THE CHIEF's Avatar
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    I believe it's late 06 vz to late 07 ve that had 4.9. was hard to work out which moo had what but I did work that out. I went to pick a part and pulled two 4.9's off 2 different ve's myself, both 07's so I can confirm as fact that early ve's had 4.9 as precat sensors. Anyway 1 was stuffed, the other worked long enough for me to work out my sensor was cooked and not my controller and I then ordered a newy.

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    sack riding 10sec rx7's Avatar
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    im 100% sure they are 4.2.. they have the 4.2 connector on them not the 4.9,

    this is the V6 sensor



    this is the 4.9

    im a cunt
    and apparently i dont know shit...

  9. #9
    Registered User THE CHIEF's Avatar
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    I don't want to argue with you, I'm sure they do also have 4.2. The ones I pulled off 2 different 07 ve's had the 4.9 with the 4.9 connector you pictured. I'll take a pic of them tomorrow when I'm in the shed and post it up with the part numbers. From my research I gathered that they where only used for a little over a year.

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    Founder Nick's Avatar
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    Thanks guys, looking at a Link G4+ Fury which supports a 4.9 with the internal wideband. Just wanted to hear what real people said about them.
    '06 Subaru Liberty Wagon 3.0R-B
    '03 Lexus IS300 2JZGTE

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    Registered User THE CHIEF's Avatar
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    10sec rx7. I think your right about the vz (4.2) but the ve between 07 and 08 used the 4.9. I can't work out how to post pics and CBF right now but this is the part no. 0 258 017 123 , on the bosh Motorsport website it lists it as 06-08 ve V6.

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    Registered User THE CHIEF's Avatar
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    Quote Originally Posted by Nick View Post
    Thanks guys, looking at a Link G4+ Fury which supports a 4.9 with the internal wideband. Just wanted to hear what real people said about them.
    Should get at least 2 years out of them in aftermarket applications and replacements can be had for around $100. I reckon thats pretty fair and reasonable service life for the $.

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    Quote Originally Posted by Nick View Post
    Thanks guys, looking at a Link G4+ Fury which supports a 4.9 with the internal wideband. Just wanted to hear what real people said about them.
    Just FYI I have the G4+ thunder and have had no issues with the 4.9 this far on the internal W/B. It's on an RB30et street/track car so sees pretty harsh conditions at the track...that said car probably only gets driven for a few hours every other week; has had this setup for a year.

    Used to run a 4.2 sensor on the old setup in an innovate lc-1 and I went through 3 sensors over 6 years or so. Lc-1's don't have the best rep though.

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