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Audi A4 Engine Service & Maintenance Parts

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ECS Tuning Timing Belt Kit - Ultimate Plus

ES#1893863 - 078198675 - ECS Tuning Timing Belt Kit - Ultimate Plus - The most comprehensive timing belt kit on the market! - Assembled By ECS - Audi

The most comprehensive timing belt kit on the market! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
1893863
Mfg#:
078198675
Back Ordered
ON SALE!
$277.71 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Cooling System Refresh Kit - Level 1

ES#2586303 - 06B121111K1KT - Cooling System Refresh Kit - Level 1 - Replace your thermostat, temp sensor and expansion tank with one kit! - Assembled By ECS - Audi

Replace your thermostat, temp sensor and expansion tank with one kit! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2586303
Mfg#:
06B121111K1KT
Ships in 3 Business Days
ON SALE! SAVE 49%
$546.99

This product was last offered at the strikethrough price on
05-02-2026

$276.63 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Rear Oxygen Sensor - Priced Each

ES#4135682 - 06E906265Q - Rear Oxygen Sensor - Priced Each - Keep your engine running efficiently - Denso - Audi

Keep your engine running efficiently Fits the left and right position

Brand:
Denso - Corporate Logo
ES#:
4135682
Mfg#:
06E906265Q
Ships in 2 Business Days
$142.99

This product was last offered at the strikethrough price on
05-07-2026

$137.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Left (Cylinders 4-6)

ES#3419356 - 1K0998262N - Oxygen Sensor - Left (Cylinders 4-6) - Found before the catalytic converter - Walker - Audi Volkswagen

Found before the catalytic converter

Brand:
Walker - Corporate Logo
ES#:
3419356
Mfg#:
1K0998262N
Ships in 2 Business Days
$161.99

This product was last offered at the strikethrough price on
04-10-2026

$137.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Air Filter

ES#1831859 - 33-2945 - Performance Air Filter - Drop in replacement for your vehicle - K&N - Audi

Drop in replacement for your vehicle

Brand:
K&N - Corporate Logo
ES#:
1831859
Mfg#:
33-2945
Ships in 8 Business Days
$68.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Drain Plug Washer - Priced Each

ES#4537 - 216-26031 - Drain Plug Washer - Priced Each - Replace with every oil service to prevent leaks. 26x1.5 - Elring - Audi Volkswagen

Replace with every oil service to prevent leaks. 26x1.5 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Up to VIN 8D-X-199999, split is in the 1999 model year (with the original oil pan)

Brand:
Elring - Corporate Logo
ES#:
4537
Mfg#:
216-26031
In Stock
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cooling System Refresh Kit - Level 3 With ECS Billet Aluminum J-Plug

ES#2795706 - 06B121132EKT4 - Cooling System Refresh Kit - Level 3 With ECS Billet Aluminum J-Plug - Includes ECS' upgraded J-plug, replace critical cooling system components & perform a proper coolant system flush - Assembled By ECS - Audi

Includes ECS' upgraded J-plug, replace critical cooling system components & perform a proper coolant system flush 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2795706
Mfg#:
06B121132EKT4
Ships in 3 Business Days
ON SALE! SAVE 17%
$330.99

This product was last offered at the strikethrough price on
05-02-2026

$274.71 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Timing Belt Kit - Ultimate Plus

ES#5953 - AWMTBKV2 LVwaf - Timing Belt Kit - Ultimate Plus - Our most complete timing belt kit with coolant - Assembled By ECS - Audi

Our most complete timing belt kit with coolant 10X Entries Into Our F80 M3 Sweepstakes
From VIN 8D-1-042385, split is in the 2001 model year

Brand:
Assembled By ECS - Corporate Logo
ES#:
5953
Mfg#:
AWMTBKV2 LVWAF
Ships in 7 Business Days
ON SALE!
$280.99

This product was last offered at the strikethrough price on
04-08-2026

$274.46 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Fuel Filter

ES#2568762 - 1H0201511A - Fuel Filter - Restore fuel mileage and performance - Hengst - Audi Volkswagen
ECS Tuning recommends this product.

Restore fuel mileage and performance 5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat! Hengst is our preferred OEM filtration supplier!

Brand:
Hengst - Corporate Logo
ES#:
2568762
Mfg#:
1H0201511A
In Stock
$20.99 USD
Free Shipping
on orders $49 and up

Rear Oxygen Sensor - Priced Each

ES#4057477 - 1K0998262T - Rear Oxygen Sensor - Priced Each - Keep your engine running efficiently - Denso - Audi Volkswagen

Keep your engine running efficiently

Brand:
Denso - Corporate Logo
ES#:
4057477
Mfg#:
1K0998262T
Ships in 2 Business Days
$139.99

This product was last offered at the strikethrough price on
05-07-2026

$135.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Hightec SYNTH RS SAE 0W-40 - 1 Liter

ES#5374159 - 20020-0010-99 - Hightec SYNTH RS SAE 0W-40 - 1 Liter - High-performance engine oil with an optimal viscosity grade produced using fully synthetic polyalpha-olefins (PAO). - ROWE - Audi BMW Volkswagen Mercedes Benz MINI Porsche

High-performance engine oil with an optimal viscosity grade produced using fully synthetic polyalpha-olefins (PAO).

Brand:
ROWE - Corporate Logo
ES#:
5374159
Mfg#:
20020-0010-99
In Stock
$16.99 USD
Free Shipping
on orders $49 and up

Timing Belt Kit - Ultimate Plus

ES#5952 - AWMTBKV2EVWAF - Timing Belt Kit - Ultimate Plus - Our most complete timing belt kit with coolant - Assembled By ECS - Audi

Our most complete timing belt kit with coolant 10X Entries Into Our F80 M3 Sweepstakes
Up to VIN 8D-1-042384, split is in the 2001 model year

Brand:
Assembled By ECS - Corporate Logo
ES#:
5952
Mfg#:
AWMTBKV2EVWAF
Ships in 7 Business Days
ON SALE!
$284.99

This product was last offered at the strikethrough price on
05-02-2026

$271.72 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Cooling Flange Replacement Kit - With Coolant

ES#2602886 - 06B121132EKT - Cooling Flange Replacement Kit - With Coolant - Cure the common coolant leak coming from the back of your engine compartment - Assembled By ECS - Audi

Cure the common coolant leak coming from the back of your engine compartment 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2602886
Mfg#:
06B121132EKT
Ships in 3 Business Days
ON SALE!
$97.99

This product was last offered at the strikethrough price on
05-02-2026

$90.49 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Spark Plugs - Set Of Six (#PFR6U-11G)

ES#5456 - PFR6U-11G-6 - Spark Plugs - Set Of Six (#PFR6U-11G) - The easiest way to restore performance and MPGs. - NGK - Audi

The easiest way to restore performance and MPGs. We Price Match - Give Us A Call or Chat!

Brand:
NGK - Corporate Logo
ES#:
5456
Mfg#:
PFR6U-11G-6
Ships in 2 Business Days
$135.36

This product was last offered at the strikethrough price on
07-02-2026

$135.06 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oil Filter - Pack Of 10

ES#5136 - 06D115562.10 - Oil Filter - Pack Of 10 - Stock up for future maintenance! - Hengst - Audi Volkswagen

Stock up for future maintenance! 5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Hengst - Corporate Logo
ES#:
5136
Mfg#:
06D115562.10
In Stock
$89.99 USD
Free Shipping

Ignition Coil - Priced Each

ES#2877821 - 06E905115E - Ignition Coil - Priced Each - Keep your engine running smooth - Denso - Audi Volkswagen

Keep your engine running smooth

Brand:
Denso - Corporate Logo
ES#:
2877821
Mfg#:
06E905115E
Ships in 2 Business Days
$53.82 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Service & Maintenance Parts

An ounce of prevention improves engine reliability and heads off big-ticket repairs. On average, the modest cost or periodic maintenance pays handsome rewards. Plan now to put your car on a regular schedule that includes fluid and filter changes, inspections, and recommended service.

Let us help you find the parts that fit your Audi

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Manufacturer names and/or part numbers are used only for identification purposes.

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