When consumer diagnostics firm Carly released a nationwide mystery shop claiming drivers were being charged up to five times the “expected standard” of £110 for a simple oxygen sensor repair, we knew the figures didn’t add up.
Garage Matters immediately put questions directly to Carly to challenge their methodology. Did their baseline account for OE-quality parts? Did it include diagnostic labour? And how did they distinguish between a malicious “upsell” and a responsible garage carrying out a routine Vehicle Health Check (VHC)?
Carly’s exclusive response to our questions clarifies those sensational consumer headlines—but it also delivers a sobering reality check for the aftermarket.
Related: Mainstream media’s lazy attack on garages: Why latest “rip-off” report is flawed
1. The £110 Figure Was Just the Minimum
Garage Matters asked Carly if the £110 benchmark accounted for the difference between budget aftermarket parts and the OE components professional shops use to guarantee a repair.
“It was a range, with £110 being the lowest in that range,” a Carly spokesperson admitted to Garage Matters. “The overall £110-£260 range factors in price variations for garage type, parts, labour rates and location.”
They also explicitly stated to Garage Matters: “Yes, labour time was included.”
Garage Matters verdict
This is where app-based estimators collide with workshop reality. If a genuine OE-quality oxygen sensor (like Bosch or NTK) costs £60 to £100, and you factor in 20% VAT, a £110 total bill leaves virtually nothing for an hour of professional diagnostic time.
By validating £110 as the baseline “expected standard,” the data relies on rock-bottom labour rates and budget aftermarket parts, setting a completely false expectation for the consumer.
When you apply real-world workshop maths, a £260 quote from an independent or a £328 quote from a main dealer isn’t a “three-times rip-off”, it is simply the realistic cost of proper diagnostic labour, OE parts, and a workshop warranty.
2. The “phantom” upsells
In their initial report, Carly accused several garages of unnecessary upselling (e.g., advising on brake pads and spark plugs).
Garage Matters challenged them on this: advising a customer on worn brakes during a diagnostic visit is the sign of a responsible garage carrying out a duty of care.
Their answer leaves no room for defense.
“In the case of the mystery shop, the car was fully prepared and inspected before and after each garage visit and did not have the additional faults raised by the garages in question, so these were pretty clear-cut cases,” Carly stated.
Garage Matters verdict
Carly maintains the garages caught in their sting were actively attempting to sell “phantom” repairs. When a workshop recommends brake replacements on a car with perfectly healthy pads, it damages the reputation of the entire independent sector.
Carly stressed to Garage Matters that their goal was “not to attack garages, but to try to close the information gap.”
For the honest independent garage, the antidote to this growing consumer distrust is already in your toolbox: Digital Video VHCs.
If you are recommending brake pads, show the customer the wear indicator on video. Total transparency is the only way to prove your quotes are fair, accurate, and essential.
