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Audi B5 S4 2.7T Engine Electrical Parts

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Take control of your day. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTEK - Corporate Logo
ES#:
4492818
Mfg#:
40-255
In Stock at Vendor
$118.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#277731 - 058905379 - Air Temperature Sensor - Measures the temperature of the air entering the engine - Genuine Volkswagen Audi - Audi Volkswagen

Measures the temperature of the air entering the engine affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
277731
Mfg#:
058905379
Ships in 8 Business Days
7% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$121.99

This product was last offered at the strikethrough price on
07-04-2026

$113.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2898720 - 443919578C - A/C Clutch Control Relay - Engages the magnetic clutch on the compressor - Vemo - Audi Volkswagen

Engages the magnetic clutch on the compressor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Vemo - Corporate Logo
ES#:
2898720
Mfg#:
443919578C
In Stock at Vendor
$56.99

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

$54.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4849592 - 038903803E - Voltage Regulator - Maintains a constant voltage level by controlling the alternator's output. - Vemo - Audi Volkswagen

Maintains a constant voltage level by controlling the alternator's output. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For Bosch style alternators

Brand:
Vemo - Corporate Logo
ES#:
4849592
Mfg#:
038903803E
In Stock at Vendor
$54.06 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#275298 - 038903119K - Alternator Pulley - Does not include securing hardware - Genuine Volkswagen Audi - Audi Volkswagen

Does not include securing hardware affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For Bosch style alternators

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
275298
Mfg#:
038903119K
In Stock
ON SALE!
$107.99

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

$106.96 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#258812 - 058905105 - Ignition Coil - Priced Each - Does not include the spark plug boot - Genuine Volkswagen Audi - Audi Volkswagen

Does not include the spark plug boot affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
258812
Mfg#:
058905105
In Stock
ON SALE! SAVE 34%
$157.99

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

$103.69 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2864566 - 034-108-6001 - MAF Housing Adapter - RS4 - Seamlessly install your 034Motorsport 85mm MAF Housing with a factory RS4 airbox - 034Motorsport - Audi

Seamlessly install your 034Motorsport 85mm MAF Housing with a factory RS4 airbox affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
2864566
Mfg#:
034-108-6001
Ships in 2 Business Days
ON SALE! SAVE 10%
$112.00

This product was last offered at the strikethrough price on
06-28-2026

$100.80 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#270501 - 026133784G - Leak Detection Pump Elbow - Connects the leak detection pump to the vacuum reservoir adapter - Genuine Volkswagen Audi - Audi Volkswagen

Connects the leak detection pump to the vacuum reservoir adapter affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
270501
Mfg#:
026133784G
Ships in 2 Business Days
9% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$21.99

This product was last offered at the strikethrough price on
07-04-2026

$19.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2812980 - 058905161B - Hall Sender - Priced Each - Measures cam position and relays it to the ECU - Hamburg Tech - Audi Volkswagen

Measures cam position and relays it to the ECU affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2812980
Mfg#:
058905161B
Ships in 1 Business Day
$95.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2932400 - ATD382 - 100 Piece Mini Car Fuse Assortment - You never know when you will blow a fuse so it always good to have extra - ATD Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche

You never know when you will blow a fuse so it always good to have extra affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
ATD Tools - Corporate Logo
ES#:
2932400
Mfg#:
ATD382
Ships in 2 Business Days
$31.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2899179 - 4D0951253 - Fuel Pump Relay - 372 - Keep the fuel pump going - Vemo - Audi Volkswagen

Keep the fuel pump going affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Vemo - Corporate Logo
ES#:
2899179
Mfg#:
4D0951253
Special Order: No Guaranteed ETA
$91.99 USD
Free Shipping
on orders $49 and up
ES#5051 - ATP-FLS-022 - Universal Oxygen Sensor Bung - Priced Each - Stainless steel weld-in nut for any O2 sensor - ATP - Audi BMW Volkswagen

Stainless steel weld-in nut for any O2 sensor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
ATP - Corporate Logo
ES#:
5051
Mfg#:
ATP-FLS-022
Ships in 6 Business Days
$12.95 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Shut down quickly & remotely - required by many racing organizations affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Rennline - Corporate Logo
ES#:
2839899
Mfg#:
EL25RED
Ships in 5 Business Days
$45.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4069842 - 101000063AA - Spark Plug - Priced Each - Keep your engine running strong - Bosch FR-7-KPP-33+ - Bosch - Audi Volkswagen

Keep your engine running strong - Bosch FR-7-KPP-33+ affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
4069842
Mfg#:
101000063AA
In Stock at Vendor
$12.99

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

$10.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3410515 - 078905377 - Knock Sensor - Brown Connector - Priced Each - Detects engine ping for timing adjustment - FAE - Audi

Detects engine ping for timing adjustment affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
From VIN 8D-X-260001, split is in the 1999 model year

Brand:
FAE - Corporate Logo
ES#:
3410515
Mfg#:
078905377
In Stock
Limited Qty Sale
$48.99

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

$42.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4492815 - 40-339 - CTEK CT5 Power Sport  - The CT5 POWERSPORT (part# 40-339) makes sure you're ready for action every time. - CTEK - Audi BMW Volkswagen Mercedes Benz MINI Porsche

The CT5 POWERSPORT (part# 40-339) makes sure you're ready for action every time. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTEK - Corporate Logo
ES#:
4492815
Mfg#:
40-339
In Stock at Vendor
$84.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Electrical Parts

With automotive electrical content growing yearly, it has never been more important to keep your charging and electrical system in top working condition. ECS Tuning stocks a huge and constantly growing inventory of electrical sensors, electric motors, and electronic actuators from original equipment and name-brand aftermarket suppliers.

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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