2021 Mercedes S Class alternator price snapshot
- Low
- $85
- Average
- $376
- High
- $788
Year-specific price guide
Used 2021 Mercedes S Class Alternator prices
Year-specific used alternator pricing for the 2021 Mercedes S Class, built from real salvage yard and junkyard listings with condition grade and fitment detail.
SKWritten bySaurabh Kumar · Co-Founder & CTO
SK
Saurabh Kumar
Co-Founder & CTO, Part Price Guide
Built the pricing pipeline that collects and normalizes used OEM part listings from salvage yards and online marketplaces across the US.
ASReviewed byAmbika Sharma · Co-Founder & COO
Last updatedSep 30, 2026AS
Ambika Sharma
Co-Founder & COO, Part Price Guide
12 years of project management and technical operations experience. Reviews price guides for sample size, fitment accuracy, and data freshness.
Part overview
About the 2021 Mercedes S Class alternator
A used 2021 Mercedes S Class alternator costs between $85 and $788, with a median of $299 from 53 salvage yard listings.
What the alternator does, common failure signs, and prices across all vehicles: used alternator price guide →
Price summary
A used 2021 Mercedes S Class alternator costs $85 to $788, with a median asking price of $299. Based on 53 priced salvage yard listings across the US, compatible across 2014–2021 (7 model years), updated Sep 30, 2026. Prices exclude shipping, core charges, and installation.
Grade A (excellent)$299
USD
Condition comparison
Price by part grade
Grade AClean / low wear$85–$78851 listings
Grade XUngraded$574–$6002 listings
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $85–$788 | 51 | |
| Grade XUngraded | $574–$600 | 2 |
Median by grade
Grade price comparison
Grade A$299
Ungraded$600
Median asking price by seller-reported condition grade · $85–$788 overall range
Replacement cost
What is the 2021 Mercedes S Class alternator replacement cost?
- Used part
- $299
- 2021 Mercedes S Class median asking price
- Labor
- $95–$375
- 1–2.5 hours at $95–$150/hr
- Estimated total
- $395–$675
- median used part + labor
Labor is a typical independent-shop range for alternator replacement, not a quote for your vehicle. The part price is the live median from the salvage-yard listings on this page. Full alternator replacement cost breakdown
Fitment matters
Price by trim & variant
Year-specific context
How does the 2021 Mercedes S Class compare?
The 2021 guide is based on 67 observed listings, including 53 with posted prices. Its $299 median is 48% above the Mercedes S Class guide's $202 median.
Among the 8 model years with current price data, 2021 ranks #7 from lowest to highest median.
Interchange data shows this part is also listed under model years 2014, 2015, 2016, 2018, 2019, 2020. Shopping across all 7 compatible years may surface better prices or condition grades.
Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.
Compare model years
What does a Mercedes S Class alternator cost in other years?
Keep browsing this vehicle
What other Mercedes S Class parts are priced?
01wide ±108%
AC Compressor
$250median
$80$620
02wide ±181%
ABS Module
$255median
$75$1,000
03wide ±198%
Air Bag
$225median
$50$940
04wide ±209%
Axle Shaft
$278median
$50$1,212
05wide ±136%
Blower Motor
$105median
$45$331
06wide ±259%
Brake Caliper
$280median
$50$1,499
07wide ±181%
Rear Bumper Assembly
$946median
$170$3,600
08wide ±190%
Front Bumper
$600median
$225$2,500
09wide ±137%
Rear Bumper
$550median
$150$1,655
10wide ±239%
Car Radio
$271median
$55$1,350
11wide ±171%
Center Console
$212median
$63$787
12wide ±189%
AC Condenser
$200median
$45$800
13wide ±222%
Control Arm
$180median
$50$849
14
Differential
Price data updating
15wide ±137%
Door Assembly
$998median
$250$2,975
16wide ±125%
Drive Shaft
$342median
$108$962
17wide ±105%
Engine
$9,999median
$3,995$25,000
18wide ±229%
Engine Computer
$241median
$44$1,150
19wide ±133%
Exhaust Manifold
$250median
$79$742
20wide ±145%
Fender
$475median
$122$1,499
21wide ±70%
Fog Light
$242median
$70$410
22wide ±246%
Front Seat
$402median
$90$2,070
23wide ±182%
Fuel Pump
$150median
$33$580
24wide ±176%
Fuel Tank
$340median
$125$1,324
25wide ±252%
Grille
$300median
$50$1,560
26wide ±118%
Headlight Assembly
$1,450median
$425$3,850
27wide ±207%
Heater Core
$116median
$60$540
28wide ±99%
Hood
$1,000median
$215$2,185
29wide ±175%
Ignition Switch
$100median
$35$384
30
Instrument Cluster
Price data updating
31wide ±135%
Intake Manifold
$181median
$35$525
32wide ±75%
Master Cylinder
$87median
$45$175
33wide ±116%
Side Mirror
$600median
$210$1,599
34tight ±15%
Power Steering Pump
$831median
$630$887
35wide ±87%
Quarter Panel
$777median
$340$1,685
36wide ±166%
Radiator
$200median
$55$720
37wide ±190%
Rear View Mirror
$119median
$40$493
38wide ±148%
Starter
$125median
$30$400
39wide ±139%
Steering Column
$225median
$75$699
40wide ±129%
Steering Rack
$950median
$300$2,750
41wide ±149%
Steering Wheel
$610median
$150$1,973
42wide ±203%
Strut
$350median
$78$1,500
43wide ±216%
Sunroof
$660median
$150$2,999
44wide ±86%
Tail Light
$406median
$175$872
45wide ±243%
Tailgate
$560median
$100$2,825
46wide ±189%
Throttle Body
$120median
$39$493
47spread ±40%
Torque Converter
$755median
$299$909
48wide ±77%
Transfer Case
$590median
$293$1,200
49wide ±226%
Transmission
$1,799median
$305$8,444
50wide ±269%
Transmission Control Module
$135median
$25$750
51wide ±256%
Turbocharger
$450median
$90$2,398
52wide ±174%
Water Pump
$150median
$25$546
53wide ±134%
Wheels
$475median
$125$1,400
54wide ±112%
Window Regulator
$199median
$50$495
Common questions
2021 Mercedes S Class alternator FAQ
How much is a used 2021 Mercedes S Class alternator?
Based on 53 priced salvage-yard listings, a used 2021 Mercedes S Class alternator lists between $85 and $788, with a median asking price of $299.
How much does it cost to replace a 2021 Mercedes S Class alternator?
Using a used part, a 2021 Mercedes S Class alternator replacement typically runs $395–$675 all-in: the median used alternator for this year lists at $299, and independent-shop labor for alternator replacement typically takes 1–2.5 hours at $95–$150/hr ($95–$375). Labor is a national part-level estimate, not a quote for your vehicle.
Will a 2021 Mercedes S Class alternator fit another year?
Based on salvage-yard interchange data, listings for the 2021 Mercedes S Class alternator also appear under model years 2014, 2015, 2016, 2018, 2019, 2020, suggesting these years share compatible fitments. Always verify the exact part number, drivetrain, trim, and your VIN before buying — interchange compatibility can vary by variant.