If you are searching for a PCV breather hose Audi fix because your 3.0T idles like it has hiccups, throws a lean code, and smells faintly of hot oil, you are on the right track: a cracked breather hose is near the top of the suspect list. The Audi version of this part is molded plastic, and ten years of heat, oil vapor and vacuum turn it into something with the flexibility of a potato chip. The good news: this is a cheap part and one of the easier leaks to find. For B8 S4, C6 A6, C7 A7 and 4L Q7 owners, the Vorsprung PCV breather hose for Audi 3.0T, 06E103207AP is the direct fix at a fraction of the dealer price.
This guide covers what the pcv breather hose on an Audi 3.0T actually does, how it fails, the three part numbers you are most likely to need, and how to confirm fitment before you order.
What the PCV Breather Hose Does on the Audi 3.0T
The PCV valve separates oil mist from crankcase blow-by gases. The breather hose (Audi calls it a pipe or hose depending on the catalog) carries those cleaned gases from the PCV valve into the intake tract so they get burned. It is a sealed path. Any crack lets unmetered air into the intake, which the mass airflow sensor never counted, and the ECU has to guess. It guesses badly.
On the EA837 the hose runs across the top rear of the engine in a lot of heat. It is molded plastic with quick-connect ends and O-rings, and the most common failure points are the connector ends and elbows.
Symptoms of a Cracked PCV Breather Hose
- ✅ Rough, erratic or hunting idle, often worse when warm.
- ✅ Lean codes (P0171/P0174) and intake air leak codes.
- ✅ Whistle or hiss that changes with engine speed.
- ✅ Oil residue around the hose ends or on the back of the engine.
- ✅ Broken retaining tabs from a previous repair attempt.
The same symptoms show up with a torn PCV valve diaphragm or a leaking intake manifold gasket, so do a smoke test before you buy. Our Audi PCV valve guide walks through the test sequence and the Hengst valve part numbers.
Audi 3.0T PCV Breather Hose Part Numbers
Audi revised this part several times, and model-year cutovers overlap (2013 S4 and S5 were split by build date). Treat the table as a starting point, and confirm with your VIN or the number molded into your old hose before ordering.
| Part number | Typical applications (confirm by VIN) | Vorsprung | Genuine Audi |
|---|---|---|---|
| 06E103207AP (supersedes AC, AH) | B8 S4, C6 A6 quattro, C7 A7, 4L Q7 | Vorsprung PCV pipe 06E103207AP, $64.99 | Genuine 06E103207AP, $159.99 |
| 06E103207P (interchangeable with N and AM) | 2009-2011 C6 A6, 2012-2013 C7 A6/A7, 2013 D4 A8, 2010-2016 S4/S5, 2010-2013 4L Q7 | Vorsprung PCV pipe 06E103207P / AM, $34.99 | Dealer pricing |
| 06E103207AR (supersedes AE, AJ) | 2016-2018 C7 A6/A7, 2015-2018 D4 A8, late B8.5 S4/S5, 2017-2019 4M Q7 | Vorsprung breather hose 06E103207AR, $79.99 | Dealer pricing |
Send us your VIN if the table leaves you in doubt. It takes us a minute and saves you a return.
OE vs Vorsprung vs Typical Aftermarket Hose
The genuine Audi 06E103207AP costs $159.99 with us. The Vorsprung replacement for the same part number is $64.99, made to factory dimensions and built from heat and oil-resistant material. Typical aftermarket hoses from overseas marketplace sellers are cheaper still, but fit and connector quality are a gamble, and a hose that pops off under boost is not a bargain.
| Vorsprung 06E103207AP | Typical budget aftermarket | Genuine Audi | |
|---|---|---|---|
| Fit | Factory dimensions, drop-in | Hit or miss connectors | Factory |
| Material | Heat and oil-resistant construction | Unknown | Factory plastic |
| Fitment support | VIN check on request | None | Dealer parts counter |
| Price | $64.99 | Varies | $159.99 |
Same fit, same job, and more money left for the parts that make power. Grab the Audi 3.0T PCV breather hose 06E103207AP and keep the Audi Tax in your wallet.
Shop the Vorsprung PCV Breather Hose 06E103207AP, $64.99
✅ Factory-dimension replacements and genuine options ✅ VIN fitment checks from real 3.0T owners ✅ Fast US shipping
What to Look for When Buying a PCV Breather Hose
- ✅ Match the part number, not just "3.0T". Three different hoses cover this engine.
- ✅ Check that the quick-connect ends and O-rings are included and seat with a positive click.
- ✅ Look for heat and oil-resistant material. The factory plastic is exactly what failed.
- ✅ Replace clamps and inspect neighboring hoses. Brittle plastic rarely fails alone.
- ✅ If you are tuning or tracking the car, consider whether a PCV relocation makes more sense.
Fitment in Plain English
Early B8 S4s, C6 A6 quattros, C7 A7s and 4L Q7s generally use the 06E103207AP breather hose. Many 2010-2016 S4 and S5 cars, early C7 A6 and A7, the 2013 A8 and 2010-2013 Q7 use the 06E103207P / AM pipe, and early-build 2013 S4 and S5 cars are likely in this group. Later CREC-era cars (2016-2018 A6 and A7, 2015-2018 A8, 2017-2019 4M Q7) and some late B8.5 S4 and S5 cars use the 06E103207AR breather hose. EA825 4.0T owners: we do not stock a 4.0T breather hose right now, so use the Audi parts catalog by VIN.
Install Tips
- ✅ Access varies by model and part number, so check the repair procedure for your car first, and take photos of the routing before anything comes off.
- ✅ Release the quick-connect tabs gently. Old plastic snaps if you pry.
- ✅ Lightly oil the O-rings with clean engine oil so they seat without rolling.
- ✅ Smoke test again after install and clear codes.
- ✅ If the supercharger is coming off anyway, add the Hengst PCV valve and the GLT TruSeal intake manifold gasket set.
- ✅ Planning a relocation? The billet PCV housing adapter and 19mm to 10AN quick connect are the starting point. Our braided oil lines guide covers AN hose basics.
While you are chasing leaks, check the oil filter housing too. Our oil filter housing gasket guide and step-by-step replacement guide cover that common 3.0T weep. More maintenance parts live in our maintenance musts collection.
PCV Breather Hose Audi FAQ
What does the PCV breather hose do on an Audi?
It carries cleaned crankcase gases from the PCV valve into the intake so they are burned. A crack lets unmetered air in and causes lean running and rough idle.
What are the symptoms of a bad PCV breather hose on an Audi 3.0T?
Rough or hunting idle, lean codes like P0171 and P0174, a hiss that changes with RPM, oil residue at the hose ends, and sometimes misfires.
Which PCV breather hose fits my Audi?
Common 3.0T part numbers are 06E103207AP, 06E103207P (also AM and N) and 06E103207AR. Model-year cutovers overlap, so confirm with your VIN or the number on your old hose.
Is the Vorsprung hose the same as the genuine Audi part?
It is an aftermarket replacement made to factory dimensions for the same part number, not a genuine Audi part. We also stock the genuine 06E103207AP if you prefer it.
Can a cracked PCV breather hose cause a check engine light?
Yes. The leak adds unmetered air, which commonly sets lean and intake leak codes, and can cause misfire codes at idle.
Can I reuse the old O-rings on a PCV breather hose?
It is not worth it. Old O-rings harden with the hose. Use the seals supplied with the new part and lightly oil them before installing.
Should I replace the PCV valve at the same time?
Only if it tests bad or if the supercharger is already coming off. A smoke test tells you whether the leak is at the hose, the valve, or both.
Bottom Line on the PCV Breather Hose for Audi 3.0T
Picking the right PCV breather hose Audi part number is most of the job. A cracked hose on a 3.0T is a small plastic part causing a big idle headache. Smoke test it, match the part number to your VIN, and replace it with a hose that fits like factory without the dealer markup. For B8 S4, C6 A6, C7 A7 and 4L Q7 cars, start with the Vorsprung 06E103207AP PCV breather hose. Everyone else, check the P/AM and AR versions above.
Shop the Vorsprung PCV Breather Hose 06E103207AP, $64.99
Drive the difference. Drive Vorsprung.
Prices checked September 25, 2026 and subject to change.
