911uk

Lambda sensor recommendations C4

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5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHLambda sensor recommendations C4

Leading reported evidence

Replace exhaust

Suggestion or failed attempt

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.

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 am changing the exhaust on my C4.
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Lambda sensor recommendations C4

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Leading evidence: 'Replace exhaust' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace exhaust' (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.

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1 matching discussions · 5 captured posts examined · 0 partial discussions

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Use genuine bosch

Suggestion or failed attempt

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
I think I used genuine Bosch but just went for the cheapest ones I could find but from a well known parts place to make sure they weren't Chinese copies.
Original post Read captured discussion
Lambda sensor recommendations C4

Frequently discussed actions (2)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Replace exhaust

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 am changing the exhaust on my C4.
Original post Read captured discussion
Lambda sensor recommendations C4

Use genuine bosch

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
I think I used genuine Bosch but just went for the cheapest ones I could find but from a well known parts place to make sure they weren't Chinese copies.
Original post Read captured discussion
Lambda sensor recommendations C4

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.

5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

911uk: 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: 20261026T161109Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I am changing the exhaust on my C4. The old Lsmbda sensors were wotking, but they are going to come out of the old cat in one piece. Any experience of aftermarket sensors of is it best just to go OEM? MC

POST 2Original post

I think I used genuine Bosch but just went for the cheapest ones I could find but from a well known parts place to make sure they weren't Chinese copies.

POST 3Original post

Just had Bosch fitted to mine and no problems. Got them from Top Gear when I bought my exhaust as they came up as an option when making the purchase can't remember the exact cost think they were about £85 each.

POST 4 / ORIGINAL POSTEROriginal post

Thanks for the replies. I'll source some Bosch ones when I'm ready to fit them. MC

POST 5Original post

Forgot to say that one of the old sensors was removed just to make absolutely sure the Bosch replacements were the same. The new Bosch ones looked exactly the same as OEM. Cheers Stu.

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