ABS - Speed Sensor (Front) Wire Kinked
90mercedes04TO: OUR MERCEDES-BENZ PASSENGER CAR
DATE: May 1990 (supersedes 33/27, April 1990)
SUBJECT: MODIFIED FRONT AXLE SPEED SENSOR MODELS 124, 126 AND 201
REF.NO. 33/27a
Note: This S.I. contains additional parts information and model applicability. Please discard your copy of S.I. 33/27.
As of November 1989, a speed sensor with a modified wire mounting point is installed on the front axle.
Effective Serial Number
Model Chassis End Number
124.0/.1/.230 B 119671
124.090/.290 F 128718
126 A 514907
201 F 681905
Figure 1:
A fixed sleeve in the area of the clamp-on point prevents the wire from kinking. In addition, a red arrow on the sensor wire determines the position of the rubber grommet for proper positioning of the speed sensor cable.
Figure 2:
Figure 3:
Observe the following during repair work:
Only the modified version will be available as a replacement part once the inventory of the previous version is depleted. When replacing the speed sensor on vehicles manufactured prior to the effective chassis end number, the bracket (29 and 32) and the ABS cable (57) must also be replaced (Figure 2).
To replace the bracket (29) on model 126 vehicles, the brake line (5, Figure 3) first be removed from the bracket. Upon installation of the new bracket, ensure that the proper brake line connections are made and the front brakes are bled (42-010).
Parts Information
In Case of Warranty:
Time Allowance
02-3324 Front wheel speed sensor - left, Repl.
0.7 hr. | 25/80
(from previous to modified version) 0.8 hr. | 40
1.0 hr. | 50/70
02-3325 Front wheel speed sensor - right, Repl.
0.7 hr. | 25/80
(from previous to modified version) 0.8 hr. | 40
1.0 hr. | 50/70
Damage Code
43123 .. Speed sensor, front axle (ABS)
Please select proper damage type coding from topic 42.04 of microfiche
S.I. 33/27a