18 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHSpeedometer difference
Leading reported evidence
Run correct tire specs
Performed · outcome unconfirmed
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 performed work without a confirmed outcome
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.
Performed · outcome unconfirmed
So I checked and I'm running the correct tire specs that came with the car.
Leading evidence: 'Run correct tire specs' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run correct tire specs' (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
My speedo is out by 4kmh when im doing 100kmh so i'm actually doing 96kmh for those that use kmp/h
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.
18 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T130754Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Why does the speedometer show 3-4 miles faster than actual speed of car? Hooked up to computer to show speed compared to GPS compared to speedometer, first two are the same and speedo shows 3 mph faster.
I know mine is 4 MPH off...if I drive 34 MPH by the speedometer the road side radar says I'm going 30 MPH. I've heard speculation that it is a pre-factored deal for European cars marketed in the ROW, and US. But that could also just be internet garbage. I never watch the speedometer very much really, just the tachometer and driving with the flow of traffic.
It's intentional. Many posts about it. My other German car does the same thing. You can get the actual MPH via OBDII
European Union
member states must also grant type approval to vehicles meeting similar EU standards. The ones covering speedometers
[7]
[8]
[9]
are similar to the UNECE regulation in that they specify that:
The indicated speed must never be less than the actual speed, i.e. it should not be possible to inadvertently speed because of an incorrect speedometer reading.
Until a couple of weeks ago, I assumed my Mazda3 did the same thing. For years I have been driving 12 or 13 over on the highway, assuming I was going about 9 over. I found out that the Mazda3 speedometer is dead on.
Smaller wheel diameter. The speed is derived from the speed sensors in the wheel hubs, and it is all digital. So a smaller diameter wheel would spin faster. However, I don't think any one would go for that.
