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BMW E39 525i M54 2.5L

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BMW E39 525i M54 2.5L Engine Electrical Parts

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Mass Air Flow Sensor (MAF)

Complete with housing. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bremmen Parts - Corporate Logo
ES#:
5507032
Mfg#:
13621432356
Ships on Nov 27, 2026
ON SALE! SAVE 10%
$89.99

This product was last offered at the strikethrough price on
10-08-2026

$80.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Stop Light Switch

Mounts behind the brake pedal 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bremmen Parts - Corporate Logo
ES#:
5505324
Mfg#:
61316967601
Ships on Nov 27, 2026
ON SALE! SAVE 10%
$13.99

This product was last offered at the strikethrough price on
10-08-2026

$12.59 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Alternator

ES#5492752 - 12317501690 - Alternator - Restore your BMW's charging system back to original factory standards with this high-quality replacement alternator from Febi Bilstein. - Febi - BMW

Restore your BMW's charging system back to original factory standards with this high-quality replacement alternator from Febi Bilstein.

Brand:
Febi - Corporate Logo
ES#:
5492752
Mfg#:
12317501690
Special Order: No Guaranteed ETA
$245.99 USD
Free Shipping
on orders $49 and up

Crankshaft Sensor With Sealing Ring

ES#5492666 - 12141709616 - Crankshaft Sensor With Sealing Ring - Restore precise ignition timing and smooth engine response with this direct-replacement crankshaft position sensor from Febi Bilstein. - Febi - BMW

Restore precise ignition timing and smooth engine response with this direct-replacement crankshaft position sensor from Febi Bilstein.

Brand:
Febi - Corporate Logo
ES#:
5492666
Mfg#:
12141709616
Special Order: No Guaranteed ETA
$14.99 USD
Free Shipping
on orders $49 and up

Starter Motor

Restore reliable engine cranking with this replacement starter motor from Febi Bilstein.

Brand:
Febi - Corporate Logo
ES#:
5493179
Mfg#:
12412354693
Special Order: No Guaranteed ETA
$147.99 USD
Free Shipping
on orders $49 and up

OEM BMW Engine Air Pump

Common source of emissons related issues

Brand:
Pierburg - Corporate Logo
ES#:
3032195
Mfg#:
11721433959
Special Order: No Guaranteed ETA
$250.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Temperature Sensor And Gauge Kit - Green/White

ES#3173689 - oiltempgaugeKT - Oil Temperature Sensor And Gauge Kit - Green/White - The perfect combination for your oil temperature needs, a Turner oil sensor flange with a Prosport gauge! - Assembled By ECS - BMW

The perfect combination for your oil temperature needs, a Turner oil sensor flange with a Prosport gauge! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
3173689
Mfg#:
OILTEMPGAUGEKT
Back Ordered
ON SALE!
$196.99

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

$193.26 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Oil Temperature Sensor And Gauge Kit - Blue/Red

ES#3173690 - oiltempgaugeBRKT - Oil Temperature Sensor And Gauge Kit - Blue/Red - The perfect combination for your oil temperature needs, a Turner oil sensor flange with a Prosport gauge! - Assembled By ECS - BMW

The perfect combination for your oil temperature needs, a Turner oil sensor flange with a Prosport gauge! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
3173690
Mfg#:
OILTEMPGAUGEBRKT
Back Ordered
ON SALE!
$196.99

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

$193.26 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Remanufactured Alternator - 120amp

ES#2834927 - 12317501599rKT - Remanufactured Alternator - 120amp - Price includes $111 core charge - Bosch - BMW

Price includes $111 core charge We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
2834927
Mfg#:
12317501599RKT
Back Ordered
$446.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Priced Each

ES#2873855 - 11781742050 - Oxygen Sensor - Priced Each - 2 required in each application - Febi - BMW

2 required in each application We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2873855
Mfg#:
11781742050
Special Order: No Guaranteed ETA
$110.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

BMW | Sensor, fuel tank pressure

ES#4854512 - 16137193479 - BMW | Sensor, fuel tank pressure - Vemo - BMW MINI

Brand:
Vemo - Corporate Logo
ES#:
4854512
Mfg#:
16137193479
Special Order: No Guaranteed ETA
$152.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

CTEK MXS 25EC

Fully automatic 8 step smart charger and battery support unit that delivers 25A to 12V batteries from 40–500Ah.

Brand:
CTEK - Corporate Logo
ES#:
4492939
Mfg#:
40-128
Back Ordered
$437.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

CTEK Pro Battery Tester

Don't leave yourself stranded with a dead battery.

Brand:
CTEK - Corporate Logo
ES#:
4492938
Mfg#:
40-209
Back Ordered
$1103.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Universal Battery Relocation Kit

Odyssey 680 - Switch Mount

Brand:
Rennline - Corporate Logo
ES#:
2839918
Mfg#:
EL4138
Back Ordered
ON SALE! SAVE 16%
$173.00

This product was last offered at the strikethrough price on
10-07-2026

$145.00 USD
Free Shipping
on orders $49 and up

Rennline Universal Battery Mount Kit

Odyssey 925-Switch Mount To be used with the Odyssey 925 battery

Brand:
Rennline - Corporate Logo
ES#:
2839915
Mfg#:
EL4134
Back Ordered
$189.00 USD
Free Shipping
on orders $49 and up

Rennline Universal Battery Mount Kit Odyssey 925

This Battery Relocation Kit is designed to work with the Odyssey 925 lightweight battery

Brand:
Rennline - Corporate Logo
ES#:
2839916
Mfg#:
EL4135
Back Ordered
$168.00 USD
Free Shipping
on orders $49 and up

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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