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          BOSCH FUEL INJECTION TYPICAL FAILURE MODES

    BMW

       Models 528, 530, 733 (L-Jetronic) - 0 280 001 XXX
         no typical failure mode, very reliable
       Model 318 (L-Jetronic) - 0 280 000 XXX
         intermittent running, excessive rich fuel mixture
       Model 733 (Motronic 1st) - 0 261 200 XXX
         no typical failure mode, very reliable
       Models 325, 528, 633, 733 (Motronic 2nd) - 0 261 200 XXX
         intermittent running, excessive fuel mixture, starts and dies
       Models M3, M6, 535, 635, 735 (Motronic 3rd) - 0 261 200 XXX
         intermittent running, no ignition spark
       Models 325, 528, 635, 735, 750 (Motronic 4th) - 0 261 200 XXX
         high idle, no ignition spark, excessive rich fuel mixture
       Models 318, 325, 525, 740 (Motronic 5th) - 0 261 200 XXX
         no cylinder ignition spark, intermittent cylinder injection pulse, high idle
       Models 328, 540, 740, 750 (Motronic 6th) - 0 261 203 473
         no cylinder ignition spark
 
    MERCEDES BENZ

       Models 350, 450 (D-Jetronic) - 0 280 002 XXX
         intermittent running, no injection pulse, excessive fuel mixture
       Models 380, 450, 500 (CIS K-Lambda) - 0 280 800 XXX
         intermittent lean running, no O2 control
       Models 190, 260, 300, 420, 560 (CIS KE-Lambda) - 0 280 800 XXX
         no typical failure mode, very reliable
       Models C280, E320  (Motronic) - 0 261 20X XXX
         cylinder ignition or injection pulse

    PORSCHE

       Model 911SC (CIS K-Lambda) - 0 280 800 XXX
         intermittent lean running, no O2 control
       Model 911 DME - 0 261 200 XXX
         intermittent running, no ignition spark, excessive fuel floods engine
       Model 912, 914 (L-Jetronic) - 0 280 000 XXX
         no typical failure mode, very reliable
       Model 914 (D-Jetronic) - 0 280 000 XXX
         intermittent running, no injection pulse, excessive fuel mixture
       Model 928 (L-Jetronic) - 0 280 002 XXX
         no typical failure mode, very reliable
       Model 928 (LH-Jetronic) - 0 280 002 501 (502)
         no typical failure mode, very reliable
       Model 928 (LH-Jetronic) - 0 280 002 504 (506/7/8/9)
         no-start, constant injector pulse, no fuel pump, high CO level
       Model 924S, 944 (Motronic 2nd) - 0 261 200 XXX
         intermittent running, excessive fuel mixture, starts and dies
       Model 944 DME - 0 261 200 XXX
         intermittent running, no ignition spark
       Model 944S, 964 (Motronic 4th) - 0 261 200 XXX
         no typical failure mode, very reliable
       Model 951 DME - 0 261 200 XXX
         intermittent running, no ignition spark
       Model 968 (Motronic 4th) - 0 261 203 070
         no ignition spark
       Model 993 (Motronic 4th) - 0 261 203 XXX
         no typical failure mode, very reliable
       Model 993 (Motronic 6th) - 0 261 204 XXX
        no cylinder spark, excessive fuel floods engine
       Model 986/996 (Motronic 7th) - 0 261 204 XXX
        no cylinder spark, excessive fuel floods engine


           BOSCH IGNITION TYPICAL FAILURE MODES

    BMW

       Models 528, 633 - 0 227 100 025
         intermittent ignition spark

    MERCEDES BENZ

       Models 350, 450 - 0 227 051 XXX
         intermittent ignition spark
       Models 380, 450, 500 - 0 227 100 XXX
         intermittent ignition spark, no ignition spark
       Models 190, 260, 300, 420, 560 - 0 227 400 XXX
         intermittent ignition spark, catastrophic failure, non-repairable

    PORSCHE

       Model 911 - 0 227 200 XXX
         intermittent ignition spark, no ignition spark
       Models 911SC, 930 - 0 227 300 XXX
         no ignition spark, no hot start
       Model 924 - 0 227 100 010
         intermittent ignition spark, no ignition spark
       Model 928 - 0 227 100 008
         intermittent ignition spark, no ignition spark
       Model 928 (EZK) - 0 227 400 013
         no typical failure mode, very reliable
       Model 951 (KLR) - 0 261 201 XXX
         no typical failure mode, very reliable
       Model 965 (EZ) - 0 227 400 744
         no typical failure mode, catastrophic failure, non-repairable


          CLIMATE CONTROL TYPICAL FAILURE MODES

    PORSCHE

       Model 928 - 928 573 060 XX
         no compressor clutch
       Model 944 - 944 653 021 01
         compressor clutch switch failure
       Model 964 - 964 659 04Y XX
          very reliable, except for a rare excessive standby current draw,
          rear blower fuse (F1 - 30A) blown causing no front blower
          except at minimum temperature, limited diagnostics (XX = 00)
       Model 993 - 993 659 04Y XX
          very reliable, except for a rare excessive standby current draw




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