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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHABS sensor spacer needed? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Replace inductive speed sensor (old style)
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Performed · outcome unconfirmed · Original poster
So I replaced an inductive speed sensor (old style) on my front wheel carrier with a hall-effect sensor (new style).
ABS sensor spacer needed? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Replace inductive speed sensor (old style)' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check on the diagrams' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
I checked on the diagrams that I have the correct sensor, there is only one stub axle for the whole lineup and wheel carriers should be the same.
ABS sensor spacer needed? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check whether the right side would detect normally
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
I will swap left and right sensor (as the right wasn't working at all) to at least rule out a wiring issue and check whether the right side would detect normally.
ABS sensor spacer needed? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace anything
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
ABS sensor spacer needed? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace due
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
If the speed sensor has been removed or replaced due to an ABS fault, a traction control fault, or as part of post-accident repairs, a functional test must be carried out using the Porsche System Tester 2 – via the ‘Actual Values’ menu, ‘Speed’ submenu.
ABS sensor spacer needed? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check whether the right side would detect normally
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
I will swap left and right sensor (as the right wasn't working at all) to at least rule out a wiring issue and check whether the right side would detect normally.
ABS sensor spacer needed? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace due
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
If the speed sensor has been removed or replaced due to an ABS fault, a traction control fault, or as part of post-accident repairs, a functional test must be carried out using the Porsche System Tester 2 – via the ‘Actual Values’ menu, ‘Speed’ submenu.
ABS sensor spacer needed? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Test must be carried out
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
If the speed sensor has been removed or replaced due to an ABS fault, a traction control fault, or as part of post-accident repairs, a functional test must be carried out using the Porsche System Tester 2 – via the ‘Actual Values’ menu, ‘Speed’ submenu.
ABS sensor spacer needed? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Coverage and how to read this overview
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
So I replaced an inductive speed sensor (old style) on my front wheel carrier with a hall-effect sensor (new style). The sensor itself is fine and reads the correct currents, but it doesn't follow the 48 teeth profile of the stub axle (more like 2 pulses/ rev).
The parts diagram mentions a spacer, but no firm answer whether or when it would be needed. So I am turning to you guys
Do late model (> 2002) 986 have a spacer on the front ABS sensors?
I checked on the diagrams that I have the correct sensor, there is only one stub axle for the whole lineup and wheel carriers should be the same. So I can just imagine this spacer....
Descripotion in here
does not mention any spacer.It is not completely clear.
No need to source the spacer, why not using normal washers or other distance pieces and testing it again to ensure you really need them.
But:
If the speed sensor has been removed or replaced due to an ABS fault, a traction control fault, or as part of post-accident repairs, a functional test must be carried out using the Porsche System Tester 2 – via the ‘Actual Values’ menu, ‘Speed’ submenu.
And:
The optimum air gap (the distance between the sensor tip and the ABS ring) in these systems is typically between approximately 0.5 mm and a maximum of 1.5 mm.
Plus what I found:
The aluminium wheel hubs on early 996 models, in particular, are extremely prone to oxidation around the ABS sensor mounting. The corroded aluminium pushes the sensor up slightly (increasing the gap). Garages then tend to scrape the bore clean. If too much material is removed in the process, or if the factory-fitted spacer is omitted, the new sensor will sit too low
Thanks. I measured the gap which is about 0.5mm on one side and 0.6mm on the other. I loosened the screw holding it to the wheel carrier and it pushed itself out a bit (due to the bend in the wires). This didn't really change anything.
Also I blew it clean with compressed air as I figured there might be parts of the old sensor stuck between the teeth (not really visible though). Some rust and dust blew out, but no change.
As you might imagine, I am a bit puzzled now. I will swap left and right sensor (as the right wasn't working at all) to at least rule out a wiring issue and check whether the right side would detect normally.
To be continued..
This is a source reference. Confirm exact model applicability in the original material.
