Audi A6 EGR delete
Forty thousand miles a year up and down the motorway, then a fortnight of school runs. The high-mileage company car that never quite gets a hot run is the A6 whose EGR we come out to. Mobile software delete, £220.
Call 0161 694 7331. We come to you within a 40-mile radius of Eccles.
For off-road and track use only.
How the A6 gets used
The A6 diesel is the North West's company car. Sales reps, contract managers, consultants, directors of firms with three sites: an A6 Avant or saloon at 30,000 to 40,000 miles a year, most of it on the motorway network. Long runs suit the engine. The EGR sees the rest of the week: hotel car parks, cold starts at six in the morning, twenty minutes of crawling through Salford, and the days between trips when the car does a two-mile nursery run and nothing else.
Older A6s go on to a second and third life as private cars, taxi work and airport runs, where the mileage stays high but the trip length drops. Every short, cool run leaves soot in the intake and on the valve. On the V6 cars the cooler takes the same abuse and, with age, starts to leak coolant into the intake. High mileage does not foul an EGR. Short mileage does, and every A6 gets its share.
What changes after the delete
No more limp mode from the EGR on the way to a meeting. No EGR codes, no engine management light from that system. The ECU stops commanding the valve, so a sticking valve is no longer a fault the car can see, and the circuit is closed in software, so exhaust gas stops passing through the cooler and the coolant-loss route on the V6 cars closes with it. The valve, cooler and bypass flap stay on the engine and stop being used. No repeat valve bill, no second cooler. The car stays where it is parked and is back in use inside the hour.
A6 engines we cover
A6 C6 2.0 TDI, 2.7 TDI and 3.0 TDI, 2004 to 2011
The 2.0 TDI was pump-düse until 2008, then the common-rail EA189. The 2.7 and 3.0 TDI V6s carry the cooler-led fault: coolant loss with no leak, then valve and throttle fouling.
A6 C7 2.0 TDI and 3.0 TDI, 2011 to 2018
EA189 2.0 TDI to around 2014, then the EA288 with high-pressure and low-pressure EGR circuits. The 3.0 TDI EA897 V6 has the buried cooler; reaching it is most of any replacement bill.
A6 C8 40 TDI, 45 TDI and 50 TDI, 2018 onward
The 40 TDI is the EA288 evo, the 45 and 50 TDI the EA897 evo V6, all with twin-circuit EGR. Newer cars, shorter record, same remap.
All three generations are covered. See the Audi EGR delete hub for the rest of the range, or call 0161 694 7331 to confirm an engine not listed.
More than one A6
Company fleets with a handful of A6s, a taxi firm with two on airport work, a family with an A6 and a Q5. We do several cars in one visit at an office car park, depot or yard, and work around who needs their car back first. £220 per car, about an hour each. Send us each reg beforehand and we confirm engine and ECU type for every one before we set off, so nothing waits on the day.
Questions from A6 operators
Can you come to a site, depot or farm to do an A6?
I run more than one A6. Can you do them in a single visit?
How long is the A6 off the road for?
Can you do the DPF and the EGR on the A6 in the same visit?
Arrange a visit for your A6: call 0161 694 7331, tell us where the car is and when it is off the job, and we will confirm the engine and a time.
£220 per vehicle, we come to you, and same-day and next-day slots are common across Greater Manchester, Cheshire and Lancashire. No call-out charge, no strip-down, no second visit. For off-road and track use only.