2001 Audi A3 emission

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Condition	Value

expand_moreDiesel exhaust gas values


Cut-off control speed	4800–5200 rpm4800–5200 rpm4800–5200 rpm
Diesel conditioning gas injections	10
from 60° C engine oil temperature
Diesel conditioning speed	4800–5200 rpm4800–5200 rpm4800–5200 rpm
from 60° C engine oil temperature
Maximum K-value	2 1/m2 1/m2 1/m
Measuring mode	B
Measuring sensor	1
Measuring time	0.5 s0.5 s0.5 s
Stoppage time	1 s1 s1 s

expand_moreGeneral exhaust gas values


Diagnostic socket location	The diagnostic socket is at the lower edge of the dashboard on the driver's side.

expand_moreIdling speed with automatic gearbox

expand_moreAll Audi gasoline straight-4 1.6 L AEH engines


APF engine	670–860 rpm670–860 rpm670–860 rpm
Otherwise	760–880 rpm760–880 rpm760–880 rpm

expand_moreAll Audi gasoline straight-4 1.8 L AGN engines


AGN engine	760–840 rpm760–840 rpm760–840 rpm
APG engine	660–860 rpm660–860 rpm660–860 rpm


All Audi diesel straight-4 1.9 L AGR engines	860–940 rpm860–940 rpm860–940 rpm
All Audi diesel straight-4 1.9 L AHF engines	860–940 rpm860–940 rpm860–940 rpm

expand_moreAll Audi gasoline straight-4 1.8 L AJQ engines


AJQ engine	640–920 rpm640–920 rpm640–920 rpm
ARY engine	640–760 rpm640–760 rpm640–760 rpm


All Audi diesel straight-4 1.9 L ALH engines	860–940 rpm860–940 rpm860–940 rpm
All Audi diesel straight-4 1.9 L ASV engines	860–940 rpm860–940 rpm860–940 rpm
All Audi diesel straight-4 1.9 L ASZ engines	790–870 rpm790–870 rpm790–870 rpm
All Audi diesel straight-4 1.9 L ATD engines	790–870 rpm790–870 rpm790–870 rpm

expand_moreAll Audi gasoline straight-4 1.6 L AVU engines


AVU engine	670–860 rpm670–860 rpm670–860 rpm
BFQ engine	780–900 rpm780–900 rpm780–900 rpm


All Audi diesel straight-4 1.9 L AXR engines	790–870 rpm790–870 rpm790–870 rpm

expand_moreAll other modifications


AGU engine	800–920 rpm800–920 rpm800–920 rpm
AQA engine	720–840 rpm720–840 rpm720–840 rpm
ARZ engine	700–820 rpm700–820 rpm700–820 rpm
AUM engine	640–840 rpm640–840 rpm640–840 rpm

expand_moreIdling speed with manual gearbox

expand_moreAll Audi gasoline straight-4 1.6 L AEH engines


APF engine	670–860 rpm670–860 rpm670–860 rpm
Otherwise	760–880 rpm760–880 rpm760–880 rpm

expand_moreAll Audi gasoline straight-4 1.8 L AGN engines


AGN engine	760–840 rpm760–840 rpm760–840 rpm
APG engine	660–860 rpm660–860 rpm660–860 rpm

expand_moreAll Audi gasoline straight-4 1.8 L AGU engines


AGU engine	800–920 rpm800–920 rpm800–920 rpm
AQA engine	800–920 rpm800–920 rpm800–920 rpm
ARZ engine	650–850 rpm650–850 rpm650–850 rpm
AUM engine	640–840 rpm640–840 rpm640–840 rpm

expand_moreAll Audi gasoline straight-4 1.8 L AJQ engines


AJQ engine	640–920 rpm640–920 rpm640–920 rpm
ARY engine	700–840 rpm700–840 rpm700–840 rpm

expand_moreAll Audi gasoline straight-4 1.6 L AVU engines


AVU engine	670–860 rpm670–860 rpm670–860 rpm
BFQ engine	780–900 rpm780–900 rpm780–900 rpm


All other modifications	860–940 rpm860–940 rpm860–940 rpm


Minimum engine oil temperature at VET	176°F176°F80°C

expand_morePetrol exhaust gas values


CO content at idling speed	0–0.5 %0–0.5 %0–0.5 %

expand_moreCO content at increased idling speed

expand_moreAll Audi gasoline straight-4 1.8 L AGN engines


AGN engine	0–0.3 %0–0.3 %0–0.3 %
APG engine	0–0.2 %0–0.2 %0–0.2 %

expand_moreAll Audi gasoline straight-4 1.8 L AGU engines


AUM engine	0–0.2 %0–0.2 %0–0.2 %
Otherwise	0–0.3 %0–0.3 %0–0.3 %


All other modifications	0–0.3 %0–0.3 %0–0.3 %

expand_moreDelta lambda

expand_moreAll Audi gasoline straight-4 1.8 L AGN engines


AGN engine	0.03 λ0.03 λ0.03 λ


All other modifications	0.03 λ0.03 λ0.03 λ

expand_moreIncreased idling speed

expand_moreAll Audi gasoline straight-4 1.6 L AEH engines


APF engine	4300–4800 rpm4300–4800 rpm4300–4800 rpm
Otherwise	2500–2800 rpm2500–2800 rpm2500–2800 rpm

expand_moreAll Audi gasoline straight-4 1.8 L AGN engines


AGN engine	2500–2800 rpm2500–2800 rpm2500–2800 rpm
APG engine	2500–3000 rpm2500–3000 rpm2500–3000 rpm


All Audi gasoline straight-4 1.8 L AJQ engines	2500–2800 rpm2500–2800 rpm2500–2800 rpm
All Audi gasoline straight-4 1.8 L APP engines	2500–2800 rpm2500–2800 rpm2500–2800 rpm
All Audi gasoline straight-4 1.8 L ARY engines	2500–2800 rpm2500–2800 rpm2500–2800 rpm
All Audi gasoline straight-4 1.8 L AUQ engines	2500–2800 rpm2500–2800 rpm2500–2800 rpm

expand_moreAll Audi gasoline straight-4 1.6 L AVU engines


AVU engine	4300–4800 rpm4300–4800 rpm4300–4800 rpm
BFQ engine	2500–2800 rpm2500–2800 rpm2500–2800 rpm

expand_moreAll other modifications


AUM engine	2500–3000 rpm2500–3000 rpm2500–3000 rpm
Otherwise	2500–2800 rpm2500–2800 rpm2500–2800 rpm


Lambda sensor design	wideband sensor
Lambda value	0.97–1.03 λ0.97–1.03 λ0.97–1.03 λ

expand_moreMaximum HC content at idling


All Audi gasoline straight-4 1.8 L AJQ engines	100 ppm100 ppm100 ppm
All Audi gasoline straight-4 1.8 L APP engines	100 ppm100 ppm100 ppm
All Audi gasoline straight-4 1.8 L ARY engines	100 ppm100 ppm100 ppm
All Audi gasoline straight-4 1.8 L AUQ engines	100 ppm100 ppm100 ppm
All other modifications	70 ppm70 ppm70 ppm

expand_morePetrol conditioning speed

expand_moreAll Audi gasoline straight-4 1.6 L AEH engines


APF engine	4300–4800 rpm4300–4800 rpm4300–4800 rpm
Otherwise	2500–2800 rpm2500–2800 rpm2500–2800 rpm

expand_moreAll Audi gasoline straight-4 1.8 L AGN engines


AGN engine	2500–2800 rpm2500–2800 rpm2500–2800 rpm
APG engine	2500–3000 rpm2500–3000 rpm2500–3000 rpm

expand_moreAll Audi gasoline straight-4 1.8 L AJQ engines


AUQ engine	2500–3000 rpm2500–3000 rpm2500–3000 rpm
Otherwise	2500–2800 rpm2500–2800 rpm2500–2800 rpm

expand_moreAll Audi gasoline straight-4 1.6 L AVU engines


AVU engine	4300–4800 rpm4300–4800 rpm4300–4800 rpm
BFQ engine	2500–2800 rpm2500–2800 rpm2500–2800 rpm

expand_moreAll other modifications


AUM engine	2500–3000 rpm2500–3000 rpm2500–3000 rpm
Otherwise	2500–2800 rpm2500–2800 rpm2500–2800 rpm


Petrol conditioning time	120 s120 s120 s

expand_moreSpeed for disturbance variable


All Audi gasoline straight-4 1.6 L AEH engines	660–980 rpm660–980 rpm660–980 rpm

expand_moreAll Audi gasoline straight-4 1.8 L AGN engines


AGN engine	660–940 rpm660–940 rpm660–940 rpm

expand_moreAll Audi gasoline straight-4 1.8 L AJQ engines


AJQ engine	640–920 rpm640–920 rpm640–920 rpm
APP engine	600–920 rpm600–920 rpm600–920 rpm
ARY engine	540–940 rpm540–940 rpm540–940 rpm


All Audi gasoline straight-4 1.6 L AKL engines	660–980 rpm660–980 rpm660–980 rpm
All Audi gasoline straight-4 1.6 L APF engines	660–980 rpm660–980 rpm660–980 rpm

expand_moreAll other modifications


AGU engine	700–1020 rpm700–1020 rpm700–1020 rpm

expand_moreAQA engine


With automatic gearbox	620–940 rpm620–940 rpm620–940 rpm
With manual transmission	700–1020 rpm700–1020 rpm700–1020 rpm

expand_moreARZ engine


With automatic gearbox	600–920 rpm600–920 rpm600–920 rpm
With manual transmission	550–950 rpm550–950 rpm550–950 rpm

expand_moreTest speed for lambda sensor signal

expand_moreAll Audi gasoline straight-4 1.6 L AEH engines


APF engine	670–860 rpm670–860 rpm670–860 rpm

expand_moreAll Audi gasoline straight-4 1.8 L AGN engines


APG engine	660–860 rpm660–860 rpm660–860 rpm

expand_moreAll Audi gasoline straight-4 1.8 L AJQ engines


AUQ engine	640–840 rpm640–840 rpm640–840 rpm

expand_moreAll Audi gasoline straight-4 1.6 L AVU engines


AVU engine	670–860 rpm670–860 rpm670–860 rpm
BFQ engine	780–900 rpm780–900 rpm780–900 rpm

expand_moreAll other modifications


AUM engine	640–840 rpm640–840 rpm640–840 rpm

To reduce environment impact and pass government inspections keep emission parameters at the level prescribed by Audi.

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2001 Audi A3 user's manual. Keep in mind that all information here is provided “as is” without any warranty of any kind.

Before doing any DIY service please check your insurance policy and Audi warranty policy for your region. In some regions DIY service may invalidate your warranty.

Maintenance Items

Service Intervals

Conquer your fears and never give up!

DIY car service is not as difficult as it looks like and it might save you thousands of dollars per year. It might be even fun and a good thing to do with your kids on a weekend to teach them how basic machinery works. It's really hard to screw something up and damage your car permanently if you use right tools, follow Audi A3 service manual and use right parts and fluids in prescribed amounts. Even modern cars stuffed with electronics can be serviced in your garage or even in your driveway. Changing engine oil, brake fluid, ATF, replacing brake pads, and etc. It's all may be done by yourself in a mater of a couple of hours.

Doing basic service for your 2001 Audi A3 you're not only saving money, but also also improving your technical skills and learning something new.

2001 Audi A3 First generation facelift Emission

Table of Contents

Conquer your fears and never give up!

Audi A3 First generation facelift model years

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