This Volkswagen Jetta came in with the check engine light on. Our diagnostic showed an air leak, and the inspection found more. We quoted everything, and the owner picked the air leak pipes, engine mounts, driveshafts, battery and a service for now. $3,250 nett.
Job completed: September 2026
| Car | Volkswagen Jetta |
|---|---|
| Symptom | Check engine light on |
| Fault found | Air leak shown on the diagnostic scan, with the intake air pipes and purge valve pipe advised for replacement; front driveshaft boots cracked and leaking grease; battery test at 8%; minor engine oil seepage and coolant leak items noted |
| Repair done | Replaced the air pipe from the air filter housing, the air pipe from the cylinder head and the purge valve with its pipe; replaced the engine mount set; replaced both front driveshafts; new battery; engine oil and filter service |
| Parts | Original engine mounts; reconditioned driveshafts; Varta EFB battery; aftermarket air pipes |
| Time taken | Timeline confirmed when you book |
| Cost | $3,250 nett (from $3,028 before GST): air leak pipes and purge valve $1,335 with labour, engine mounts $645, driveshafts $640, battery $240, service $168. |
| Warranty | No warranty term for this job; every item quoted and approved first |
The check engine light was on. It is easy to put off, especially when you are busy.
But the light is the engine's computer telling you something is wrong. On this car the diagnostic showed an air leak. A warning left on can also mask a new fault that comes along.
The job record does not state the year, engine or mileage of this car, so we leave them out.
Like most modern cars, it relies on a sealed intake system. The engine's computer measures the air coming in, so a split pipe or a leaking valve lets in air it cannot account for.
Our diagnostic scan showed an air leak. Our team advised replacing the air pipework: the pipe from the air filter housing, the pipe from the cylinder head, and the purge valve with its pipe.
The inspection also found:
We quoted everything, with a total and a downtime estimate.
The engine's computer mixes fuel with the air it measures. When a pipe or valve leaks, extra air gets in without being measured. The mixture goes off, the computer notices, and it can turn on the check engine light.
In general, rubber and plastic pipes in a hot engine bay can harden and crack with age. The job record does not identify a physical cause on this car, so we will not guess.
The owner went through the quote with us. The owner chose to handle the coolant work separately. The oil seepage work was left for later, at the owner's choice.
What we did:
A few days later the owner noticed a spring-like sound at full steering lock. We checked the car, noted the front right brake was slightly misaligned, and told the owner the car was OK.
The full inspection quote was $7,787 before GST, including the coolant and oil leak work. The owner chose this scope instead, every line before GST:
Total: $3,028 before GST, or $3,300.52 with GST. We discounted it to $3,250 nett.
The two air pipes and the purge valve work came to $1,335 before GST including labour.
Get it scanned soon, even if the car feels fine. A warning light left on for months can hide a second fault.
Ask for the full picture while the car is on the hoist, then decide what to do now and what to plan for later. On this Jetta, the owner chose the air leak, mounts, driveshafts, battery and service now, left the oil seepage for later, and handled the coolant work separately.
This Volkswagen Jetta (check engine light air leak repair) was handled at 1 Car Service, an independent workshop in Sin Ming AutoCity, Singapore. For Volkswagen, we use dealer-level ODIS diagnostics. We hold a 4.9★ rating from 1,803+ Google reviews.
WhatsApp us your Volkswagen model. We run a diagnostic, show you what we find, and quote each item separately so you can fix the urgent things now and plan the rest.
On this Jetta, two air pipes and the purge valve with its pipe came to $1,335 before GST including labour. What your scan shows may be different, so we scan and inspect first.
It is worth it when you see the full list and choose the order. This owner got an itemised quote for everything we found and chose which items to do first, for $3,250 nett.
If the light is steady and the car drives normally, you can usually drive it to the workshop. If it is flashing, or the car is running badly, stop and call us. Either way, get it scanned soon.
Yes. We use ODIS, the dealer-level diagnostic system for Volkswagen and Audi.
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